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Views: 1135 Author: Site Editor Publish Time: 2026-01-20 Origin: Site
The Republic of Yemen is located at the southwestern tip of the Arabian Peninsula, covering a land area of 528,000 square kilometers with a total population of approximately 40.6 million (2025). Arabic is the official language, and Islam is the state religion. Bordering the Red Sea to the west and the Gulf of Aden to the south, Yemen boasts a 1,906-kilometer coastline and holds significant strategic importance. However, since the outbreak of the civil war in 2014, the country has fallen into a predicament of political division and economic collapse, becoming one of the least developed countries globally. Yemeni cities are concentrated in regions such as Sana'a, Aden, and Taiz. While 70% of the population resides in rural areas, urban regions, as political and economic hubs, face particularly acute challenges in ensuring drinking water supply. This issue directly impacts people's livelihood stability and social order, making it a key focus of the Yemeni government's people's livelihood projects.
Yemen is one of the countries with the lowest per capita water resources in the world, with less than 100 cubic meters of per capita annual water resources—far below the international water scarcity threshold of 1,000 cubic meters. Its water supply structure is extremely simplistic, with groundwater accounting for over 90% of total water supply. However, over-extraction has accelerated the depletion of aquifers. The United Nations Development Programme (UNDP) warns that if current extraction rates persist, all groundwater sources in Yemen will dry up within 20 years, with aquifers in southern regions like Aden Governorate already on the verge of exhaustion. Surface water resources are scarce and unstable, with only seasonal rivers in the western mountainous areas. Rainfall is concentrated during the rainy season but difficult to store and utilize.
War and resource shortages have led to widespread substandard water quality, with the main issues including: 1) High salinity pollution: Chloride and total dissolved solids (TDS) levels in groundwater exceed standards in many areas, with TDS concentrations exceeding 1,500mg/L in some regions—far surpassing Yemen's national standards. This problem is particularly severe in coastal and delta areas, where long-term reliance on high-salinity water poses health risks to residents. 2) Excessive fluoride: Fluoride concentrations reach up to 12mg/L in regions such as the Gulf of Aden coast and the Dali'ah Basin, well above the WHO safety limit of 0.5-1.5mg/L. This has led to a high incidence of dental fluorosis, skeletal lesions, and other diseases among local residents. 3) Microbial pollution: Groundwater in areas like the Tuban Delta in Lahij Governorate is contaminated by human waste, resulting in excessive coliform bacteria. Coupled with the lack of disinfection facilities, the risk of waterborne disease transmission is extremely high. 4) Aging and leaking pipelines: Over 40% of water is lost during transportation, while pollutants seep into the pipeline network, further deteriorating end-point water quality.
The civil war that erupted in 2014 inflicted devastating damage on Yemen's water treatment and supply systems. Over 70% of urban water supply facilities nationwide operate abnormally, with even higher damage rates in rural areas. The original groundwater monitoring system (the NWR MIS database established in 2010) ceased operation due to the war, and only a small number of manual equipment and internationally aided monitors (such as 8 groundwater level recorders) maintain basic data collection, making comprehensive water quality control impossible. Aging and leaking pipelines, paralyzed pumping stations, and a lack of disinfection equipment have become common problems. In some communities in Lahij Governorate, water supply systems with a 40-year history are nearly obsolete, relying on diesel-powered pumping which is costly. Most households are forced to purchase water from informal water tankers at high prices or travel long distances to fetch water.
Yemen's local water treatment equipment manufacturing industry is underdeveloped, with core equipment (filtration, disinfection, reverse osmosis devices) relying heavily on imports. In 2022, the water treatment equipment market size was approximately 520 million US dollars, with the high-end market dominated by European, American, and Japanese enterprises, while local enterprises only cover mid-to-low-end products such as filtration equipment and water pumps. Technology application is limited to basic disinfection (e.g., chlorination) and simple filtration, with minimal use of advanced treatment technologies such as reverse osmosis and seawater desalination. Additionally, there is a shortage of professional operation and maintenance teams. Due to funding constraints, local water companies (LCs) struggle to achieve full coverage with monthly water quality sampling and monitoring, and most areas fail to ensure that residual chlorine at the end-point meets the standard (≥0.3mg/L).
To effectively improve urban drinking water conditions and address the purification of high-salinity and highly polluted water, the Yemeni government has included urban drinking water security in its key people's livelihood projects, actively promoting the procurement of water treatment equipment and the upgrading of water supply systems. Considering factors such as the standardization of government procurement processes, international procurement efficiency, and technical adaptability, the Yemeni government launched an urban drinking water treatment equipment procurement project through a third-party procurement agency. After multiple rounds of screening and technical demonstration, it was ultimately decided to purchase 6 ton reverse osmosis equipment from UMEK for urban centralized drinking water purification projects.
This batch of 6 ton reverse osmosis equipment is precisely tailored to the characteristics of urban water quality in Yemen. It can effectively reduce TDS content in groundwater, remove fluoride and microbial pollutants, ensuring that the treated water quality meets Yemen's Water Law and WHO drinking water standards, and satisfies the daily drinking needs of urban residents. Upon project completion, it will fill the gap in advanced water treatment technology locally, provide stable and safe drinking water supply to target cities and towns, alleviate the dual pressures of water scarcity and water pollution in Yemeni urban areas, and lay the foundation for the large-scale upgrading of urban water supply systems in the future, helping Yemen gradually restore its people's livelihood security capabilities.
As the core front-end link of the 6 ton reverse osmosis equipment, the pretreatment system directly determines the operating efficiency, service life of the subsequent reverse osmosis membrane, and the final effluent quality. Combining the characteristics of high TDS, microbial content, and fluoride in Yemeni urban groundwater, as well as adapting to local operating conditions such as intermittent water supply and weak infrastructure, the pretreatment system for this project adopts a highly reliable and easy-to-maintain configuration plan. Each component has a clear division of labor and complementary advantages, as detailed below:
The system is equipped with two 316 stainless steel raw water pumps with a rated flow rate of 10 tons per hour and a lift of 38 meters, adopting a redundant design of "one in use, one standby" to accurately adapt to complex water supply scenarios in Yemen. The advantages and configuration reasons are as follows:
Precise Adaptation of Flow Rate and Lift: The rated flow rate of 10 tons per hour far exceeds the processing requirements of the subsequent 6 ton reverse osmosis equipment, ensuring stable front-end water supply pressure and avoiding uneven water intake and decreased desalination rate of the reverse osmosis membrane due to fluctuations in source water pressure. The 38-meter lift can effectively overcome the resistance of quartz sand and activated carbon filter tanks, while providing sufficient water intake power for subsequent chemical dosing mixing and reverse osmosis systems. It adapts to the low water pressure conditions of old wells and pipelines in Yemeni urban areas, solving the problem of insufficient water intake pressure.
Advantages of 316 Stainless Steel Material: In response to the high salinity of Yemeni groundwater and the presence of trace corrosive impurities in some areas, 316 stainless steel offers stronger corrosion resistance, oxidation resistance, and chloride ion erosion resistance compared to ordinary carbon steel or 304 stainless steel. It can effectively prevent pump impellers and casings from rusting and damage due to long-term contact with high-salinity water, extending equipment service life and reducing maintenance costs caused by spare parts shortages in Yemen.
Necessity of Redundant Design with One in Use and One Standby: Yemeni urban areas face unstable power supply, complex water supply conditions, and limited technical level of local operation and maintenance personnel. The "one in use, one standby" design allows for immediate switching to the standby pump during main pump failure, maintenance, or overhaul, ensuring continuous water supply of the pretreatment system. This avoids water cuts for urban residents due to equipment shutdown and reserves sufficient time for fault repair, without relying on rapid response from external technical support, adapting to local operation and maintenance conditions.
Two 4065 model fiberglass reinforced plastic (FRP) filter tanks are configured, adopting a series process of "first-stage quartz sand filtration + second-stage coconut shell activated carbon filtration"—a core pretreatment link targeting impurities and odors in Yemeni groundwater. The advantages and configuration logic of each component are as follows:
Adaptability of 4065 FRP Filter Tank Material and Specifications: The 4065 model corresponds to a filter tank with a diameter of 40 inches and a height of 65 inches, featuring sufficient volume to match the 10 tons per hour flow rate of the raw water pump. This ensures adequate water retention time in the tank for thorough filtration. FRP material offers light weight, high strength, acid and alkali resistance, and corrosion resistance. Compared to metal filter tanks, it can effectively resist erosion from high-salinity water and the acid-alkali environment during subsequent chemical dosing. It is also easy to transport and install in complex terrains of Yemeni urban areas without the need for heavy hoisting equipment, with a service life of over 15 years, adapting to local long-term use needs.
First-Stage Filtration with Medium-Grade Quartz Sand: The filter tank is filled with medium-grade quartz sand (particle size 0.8-1.2mm), whose core function is to remove physical impurities such as suspended solids, sediment, and colloidal particles in groundwater. Due to over-extraction, Yemeni groundwater often contains a large amount of sediment and formation particles. If these impurities directly enter the reverse osmosis membrane, they will scratch and clog the membrane surface, leading to decreased membrane flux, ineffective desalination rate, and significantly shortened membrane service life (reverse osmosis membranes are core consumables that are difficult to purchase locally in Yemen and costly). Medium-grade quartz sand offers uniform pores, high filtration precision, and large dirt-holding capacity, effectively retaining impurities with particle size ≥5μm. Meanwhile, it has a good backwashing effect and can achieve regular backwashing through subsequent automatic valves to restore filtration capacity, adapting to local high-impurity water quality conditions.
Second-Stage Filtration with Coconut Shell Activated Carbon: The second-stage filter tank is filled with high-quality coconut shell activated carbon, whose core role is to adsorb organic matter, odors, residual chlorine (if there is a subsequent disinfection link), and some trace heavy metals in groundwater, while assisting in removing some fluoride precursors. Affected by microbial pollution and formation organic matter, groundwater in Yemeni urban areas has odors in some regions, and excessive fluoride is a prominent problem. Compared to coal-based activated carbon, coconut shell activated carbon offers a large specific surface area, strong adsorption capacity, low ash content, and long service life. Its adsorption efficiency for organic matter and odors can reach over 85%, while optimizing water taste and providing cleaner inlet water for the subsequent reverse osmosis membrane. This avoids organic pollution of the reverse osmosis membrane and further ensures that the final effluent quality meets drinking water standards.
Both filter tanks are equipped with Runxin Valve F99B1 model automatic control valves, which core function is to address the weak technical capabilities of local operation and maintenance personnel in Yemen and the difficulty of manual operation, while ensuring the stable operation of the filtration system. The advantages and configuration reasons are as follows:
Adaptability of Automatic Control Function: The Runxin Valve F99B1 features fully automatic backwashing, forward washing, and operation switching functions. It can automatically start the backwashing program through preset time or flow parameters without manual intervention. Local water utility personnel in Yemen have limited professional skills, and manual backwashing is prone to problems such as inaccurate time control and non-standard operation, leading to decreased filtration effect or filter tank damage. The fully automatic design can significantly reduce operation and maintenance difficulty, minimize human errors, and ensure the long-term stable operation of the filtration system.
High Reliability and Adaptability: This model of valve adopts a corrosion-resistant material valve core, which can adapt to high-salinity water quality and acid-alkali environments, with excellent sealing performance to avoid water leakage, pressure relief, and other issues. It also supports single-tank independent operation and dual-tank alternating operation modes, enabling backwashing of a single tank without interrupting water supply, ensuring continuous water output of the pretreatment system, which is consistent with the demand for stable water supply of urban residents in Yemen. In addition, Runxin valves have strong spare parts versatility and low failure rates. Even if a failure occurs, replacement can be completed through simple training, adapting to the current situation of insufficient local spare parts supply.
Two independent dosing tanks and supporting SEKO dosing pumps are configured, whose core function is to adjust the pH value of inlet water to adapt to the operating requirements of the reverse osmosis membrane, while addressing the problem of fluctuating pH values of Yemeni groundwater. The advantages and configuration logic of each component are as follows:
Dual Dosing Tank Design: The dosing tanks are made of acid and alkali resistant PE material, with a volume adapted to the system flow rate. The dual-tank design can realize "one in use, one standby" or store different chemicals separately (used for storing pH regulators in this project), avoiding system shutdown due to chemical exhaustion. The local chemical procurement cycle in Yemen is long, and the dual dosing tanks can reserve sufficient chemicals in advance, while facilitating chemical replacement and dosing tank cleaning and maintenance, ensuring the continuous and stable operation of the chemical dosing link, and avoiding damage to the reverse osmosis membrane due to pH imbalance.
Advantages of SEKO Dosing Pumps: SEKO brand metering dosing pumps are selected, featuring accurate metering, a wide adjustment range, corrosion resistance, and stable operation. The pH value of Yemeni groundwater fluctuates greatly due to formation influences (pH value is below 6.5 or above 8.5 in some regions), while the optimal operating pH range of the reverse osmosis membrane is 6.0-8.0. Excessively high or low pH values will accelerate membrane aging and corrosion, reducing desalination efficiency. The SEKO dosing pump can accurately adjust the chemical dosage through manual or subsequent linkage control, ensuring that the inlet water pH value is stably maintained within the optimal range. Meanwhile, the pump body is made of corrosion-resistant material, which can adapt to the corrosion of pH regulators (such as sodium hydroxide and hydrochloric acid), has a long service life, and is equipped with a complete fault alarm function, facilitating local personnel to detect and handle problems in a timely manner.
Core Necessity of pH Adjustment: In addition to protecting the reverse osmosis membrane, a stable pH value can improve the removal efficiency of fluoride and heavy metals by the subsequent reverse osmosis system, while avoiding the precipitation of impurities in water due to abnormal pH values, which may clog membrane pores or pipelines. Combined with the complex and volatile characteristics of Yemeni groundwater quality, this chemical dosing system is a key link to ensure that the final effluent quality meets standards and extends the service life of the entire set of water treatment equipment.
In summary, each configuration of the pretreatment system is designed around the characteristics of urban groundwater quality in Yemen, local operation and maintenance conditions, and people's livelihood water supply needs, balancing reliability, stability, and ease of operation and maintenance. It provides high-quality inlet water for the subsequent 6 ton reverse osmosis system, ensuring the long-term stable operation of the entire set of equipment and continuously supplying safe drinking water to urban residents.
The reverse osmosis system is the core advanced purification unit of this 6 ton water treatment project. It receives clean water output from the pretreatment system and accurately removes pollutants such as high TDS, fluoride, and microorganisms in groundwater through membrane separation technology, ultimately achieving up-to-standard water supply. All configurations of this system are designed around Yemen's high-salinity water quality, intermittent operation conditions, and local operation and maintenance needs, balancing purification efficiency, equipment stability, and ease of operation. The specific configurations and analyses are as follows:
As the "last line of defense" for the reverse osmosis membrane, the security filter is installed at the front end of the high-pressure pump. Its core function is to retain fine impurities not completely removed by the pretreatment link, avoiding scratching and clogging of the reverse osmosis membrane. Its configuration logic and advantages are as follows:
Adaptability of FRP Material: A FRP filter is selected instead of a metal filter. On the one hand, it can resist erosion from Yemen's high-salinity water quality and the slight acid-alkali environment after front-end chemical dosing, avoiding secondary pollution caused by pipeline rust. On the other hand, it features light weight, strong pressure resistance (adapting to system pressure), and convenient transportation and installation, which is consistent with the current situation of complex terrain and limited hoisting conditions in Yemeni urban areas. Meanwhile, its service life is consistent with that of the front-end filter tanks, reducing the frequency of later replacement and maintenance.
12-Core 40-Inch Specification Design: The large-capacity design of 12-core 40-inch corresponds to a rated processing flow rate of up to 12 tons per hour, far exceeding the demand of the subsequent 6 ton reverse osmosis system. It can ensure stable water flow rate and avoid decreased filtration precision due to insufficient flow rate. Meanwhile, the sufficient number of filter elements can increase dirt-holding capacity and extend the filter element replacement cycle. Considering the long local filter element procurement cycle and high cost in Yemen, this design can effectively reduce operation and maintenance costs and shutdown frequency, ensuring continuous system operation.
Core Advantages of 5μm PP Cotton Filter Elements: 40-inch 5μm precision PP cotton filter elements are adopted, featuring high filtration precision, strong dirt-holding capacity, convenient replacement, and low cost. They can accurately retain fine suspended solids, colloidal particles, and microbial residues with particle size ≥5μm. Compared to other filter elements, PP cotton filter elements can be replaced without professional tools, adapting to the current situation of limited technical level of local operation and maintenance personnel in Yemen. Meanwhile, the 5μm precision can accurately match the inlet water requirements of the reverse osmosis membrane, avoiding scratching of the membrane surface by fine impurities and maximizing the service life of the reverse osmosis membrane (a core high-value consumable).
The high-pressure pump is the power core of the reverse osmosis system, requiring sufficient pressure to the reverse osmosis membrane to achieve water molecule permeation and separation. A special model from Nanfang Pump is selected for this project, with highly targeted configurations and advantages as follows:
Reliability of Brand and Model: As a well-known domestic brand of high-pressure pumps, Nanfang Pump's CDMF series vertical multistage pumps are specifically designed for water treatment reverse osmosis systems, featuring stable operation, low failure rate, and strong versatility of spare parts. Yemen lacks professional maintenance teams locally, and the high reliability of this model can reduce the frequency of failures. Meanwhile, general spare parts are easy to supplement through international procurement channels, avoiding long-term system shutdown due to pump failures.
Precise Adaptation of Flow Rate and Lift: The design parameters of rated flow rate of 12 tons per hour and lift of 166 meters accurately match the operating requirements of 8 reverse osmosis membranes. The 166-meter lift can be converted into a pressure of approximately 23.8MPa, far exceeding the working pressure required by the reverse osmosis membrane (fully adapting to the pressure with 450psi membrane housings). It can ensure stable water production efficiency even under conditions of high TDS in Yemeni groundwater and increased membrane resistance, avoiding decreased desalination rate and reduced water production due to insufficient pressure. Meanwhile, the 12 tons per hour flow rate can reserve sufficient redundancy to cope with flow fluctuations of the pretreatment system, ensuring uniform water intake of the membrane module.
Guarantee of 316 Stainless Steel Material: The pump body is made of 316 stainless steel, which offers stronger corrosion resistance and chloride ion erosion resistance compared to ordinary materials. It can be directly adapted to Yemen's high-salinity inlet water environment, avoiding rust and wear of pump impellers and pump chambers due to long-term contact with high-salinity water, extending equipment service life and reducing maintenance and replacement costs in war-torn areas.
Advantages of Vertical Multistage Structure: The vertical structure occupies a small area, adapting to the current situation of limited space in Yemeni urban water treatment stations. The multistage pressure boosting design can achieve stable pressure output, avoiding impact on the reverse osmosis membrane due to pressure fluctuations. Meanwhile, it operates with low noise and moderate energy consumption, consistent with local operating conditions of unstable power supply and high energy costs.
The membrane module is the core purification unit of the reverse osmosis system, responsible for separating water molecules from pollutants. Its configuration directly determines the effluent quality and system operating efficiency. The design logic adapting to Yemen's high-salinity water quality is as follows:
FRP Membrane Housings (450psi, 4 Units): 450psi (approximately 3.1MPa) pressure-resistant FRP membrane housings are selected. Each membrane housing can load 2 8040-specification reverse osmosis membranes, and 4 membrane housings are equipped with a total of 8 membrane modules, forming a series operation mode. FRP material offers high pressure resistance, corrosion resistance, and light weight, which can adapt to the high-pressure operating conditions of the reverse osmosis system, while avoiding secondary pollution caused by rust of metal membrane housings. The 450psi pressure resistance level reserves sufficient safety redundancy to cope with changes in membrane resistance caused by fluctuations in Yemeni water quality, preventing membrane housing damage due to pressure overload. In addition, the membrane housings adopt standardized interfaces, facilitating the installation, replacement, and maintenance of membrane modules, adapting to local operation and maintenance conditions.
DuPont BW30PRO-400 Reverse Osmosis Membranes: DuPont BW30PRO-400 brackish water reverse osmosis membranes are selected, which are core adaptive configurations for Yemen's high-TDS groundwater, with significant advantages: 1) High desalination rate: The removal rate of TDS, fluoride, and heavy metals can reach over 99.5%, which can reduce TDS in Yemeni groundwater exceeding 1,500mg/L to the range meeting Yemen's "Water Law No. 33 of 2002" and WHO standards (≤650mg/L), while efficiently removing fluoride (reducing to the safe range of 0.5-1.5mg/L). 2) Strong pollution resistance: This model of membrane features an optimized membrane surface structure, which can resist pollution from organic matter and colloids in water, reduce the frequency of membrane pollution, and extend the cleaning cycle, adapting to complex water quality conditions in Yemen. 3) High water production efficiency: The rated water production of a single membrane can reach 400GPD (approximately 1.5 tons per hour), and 8 membrane modules operating in series can stably achieve the water production demand of 6 tons per hour, accurately matching the project's water supply target. 4) Long service life: The stability of DuPont membranes can ensure a service life of 3-5 years under standardized operation and maintenance, reducing the cost and difficulty of frequent membrane module replacement locally in Yemen.
As the "blood vessels" of the reverse osmosis system, high-pressure pipelines are responsible for transporting high-pressure inlet water, concentrated water, and produced water. The selection of 316 stainless steel material is a core choice adapting to system operating conditions, with advantages as follows:
Dual Guarantee of High Pressure Resistance and Corrosion Resistance: The pressure in the high-pressure section of the reverse osmosis system can reach 2-3MPa. 316 stainless steel offers excellent pressure resistance, which can avoid pipeline rupture and leakage due to high-pressure operation. Meanwhile, targeting the corrosiveness of Yemen's high-salinity water quality and concentrated water (higher salinity) after membrane separation, 316 stainless steel's chloride ion erosion resistance is far superior to 304 stainless steel. It can effectively prevent pipeline rust and perforation, avoiding water leakage, shutdown, and secondary pollution problems caused by pipeline damage.
Adaptation to Long-Term Operation Needs: The urban water supply project in Yemen requires long-term stable operation. 316 stainless steel pipelines have a long service life and low maintenance costs, without the need for frequent replacement, which is consistent with the current situation of local spare parts shortages and limited maintenance conditions. Meanwhile, their smooth inner walls can reduce water flow resistance and energy consumption, adapting to local operating conditions of energy shortage.
The control system is the "brain" of the entire reverse osmosis system, responsible for equipment startup and shutdown, parameter monitoring, fault alarm, and automatic operation. The configuration focuses on stability, ease of operation, and adaptability, with specific advantages as follows:
Weinview Human-Machine Interface (HMI) Touch Screen: A Weinview touch screen is selected as the operation terminal, featuring clear display, simple operation, and strong environmental resistance. The screen can real-time monitor key system parameters, including pressure at each section (inlet and outlet of the security filter, inlet and outlet of the high-pressure pump, inlet and outlet of the membrane module), produced water quality (TDS value, pH value), and equipment operating status (working conditions of pumps, valves, and membrane modules). It also supports parameter setting and fault alarm prompts (such as abnormal pressure and substandard water quality). Targeting the limited technical level of local operation and maintenance personnel in Yemen, the touch screen adopts a Chinese-English bilingual interface design (switchable on demand) with simple operation logic. Daily operation and maintenance can be completed without professional programming knowledge, significantly reducing operation difficulty.
Schneider Low-Voltage Electrical Appliances: Low-voltage electrical appliances (contactors, circuit breakers, relays, etc.) are selected from Schneider, featuring high stability, resistance to voltage fluctuations, and low failure rate. Yemeni urban areas face unstable power supply and frequent voltage fluctuations. Schneider low-voltage electrical appliances can adapt to wide voltage range operation, avoiding burnout of electrical components due to voltage fluctuations, and ensuring stable startup and operation of the system. Meanwhile, their general spare parts are easy to purchase, adapting to local emergency maintenance needs.
Mitsubishi PLC Program Controller: As the control core, the PLC program controller is selected from Mitsubishi, featuring fast operation speed, strong anti-interference ability, and flexible programming. It can realize full automatic operation of the system, including linkage between the pretreatment and reverse osmosis systems, startup and shutdown protection of the high-pressure pump, flushing of the membrane module, and automatic shutdown in case of faults. This reduces manual intervention and avoids human operation errors. Meanwhile, its strong anti-interference ability can adapt to the complex power supply environment and on-site interference in Yemeni urban areas, ensuring accurate execution of control commands and long-term stable operation of the system.
This unit is responsible for storing pure water produced by the reverse osmosis system and achieving terminal sterilization through ultraviolet disinfection to ensure water supply safety. It adapts to the needs of intermittent water supply and microbial pollution risks in Yemeni urban areas, with advantages as follows:
50 Ton PE Anti-Corrosion Pure Water Tank: A 50-ton large-capacity PE pure water tank is selected, adapting to the intermittent water supply conditions in Yemeni urban areas. The system can operate at full load to produce and store water during periods of stable power supply, and continuously supply water to residents through tank reserves during power outages or equipment maintenance, ensuring continuous water supply. PE material is non-toxic, odorless, acid and alkali resistant, and corrosion resistant. It will not chemically react with pure water, avoiding secondary pollution. Meanwhile, it is light in weight and easy to install, without the need for complex foundation treatment, adapting to local construction conditions, and has a long service life with no frequent maintenance required. The 50-ton capacity can meet the daily water supply demand of target cities and towns, reserving sufficient reserve space to cope with sudden water supply gaps.
80W US LightSources Ultraviolet Lamp: A 80W US LightSources brand ultraviolet lamp is built into the water tank, whose core function is to perform terminal disinfection on the stored pure water, killing residual microorganisms (such as bacteria and viruses) not completely removed by the reverse osmosis system, ensuring that the microbial indicators of the effluent meet the standard of "zero coliform bacteria" in Yemen's "Water Law No. 33 of 2002". This brand of lamp offers high sterilization efficiency, long service life (up to 8,000 hours or more), and low energy consumption. The 80W power can cover the disinfection needs of the 50-ton water tank, with no chemical residue, avoiding deterioration of water taste or secondary pollution caused by chemical disinfection. Meanwhile, the lamp is equipped with a fault prompt function, facilitating operation and maintenance personnel to replace it in a timely manner, adapting to local operation and maintenance conditions. In addition, ultraviolet disinfection does not require the addition of chemicals, which can reduce the cost and difficulty of local chemical procurement and storage in Yemen.
In summary, the entire reverse osmosis system, through precise parameter matching, selection of highly reliable materials, and automatic control design, not only efficiently solves the core problems of high salinity and high pollution of urban groundwater in Yemen but also fully adapts to local operating conditions such as unstable power supply, weak operation and maintenance capabilities, and difficult spare parts procurement. It ensures the long-term stable operation of the system and continuously provides up-to-standard safe drinking water to urban residents.
The 6 ton reverse osmosis water treatment system customized by UMEK for Yemeni cities and towns is problem-oriented. All configurations are accurately laid out around local water quality characteristics and actual operation and maintenance conditions, efficiently solving core problems such as purification of high-salinity and high-fluoride groundwater, unstable power supply conditions, and limited operation and maintenance capabilities.
From the two-stage filtration and fully automatic backwashing design of the pretreatment system, to the precise parameter matching of the high-pressure pump and membrane module in the reverse osmosis unit, and then to the full-process closed-loop control of terminal water storage and disinfection, the entire set of equipment has always taken stable operation, convenient operation and maintenance, and long-term guarantee as the core goals, ensuring that the effluent quality continuously meets Yemen's "Water Law No. 33 of 2002" and WHO drinking water standards.
As a one-stop water treatment supplier, UMEK relies on 28 years of technical accumulation in the industry, 16 years of practical experience in foreign trade exports, and a project service network covering more than 120 countries around the world. It accurately grasps the water quality pain points and project implementation needs of different regions, providing a highly adaptive customized solution for this Yemeni project.
After the successful implementation of the project, it will directly improve the drinking water safety conditions of target cities and towns, providing stable and reliable high-quality water sources for local residents. It will also reaffirm UMEK's technical strength and global service capabilities in the water treatment field, providing a replicable and implementable practical model for water supply guarantee in regions facing global drinking water scarcity.
