In the field of environmental protection, the effective treatment of leachate has always been a very challenging task. Winsonda has achieved remarkable results in leachate treatment projects with its advanced technology and professional solutions. Two typical cases will be introduced in detail below.
Case 1: Breakthrough in the treatment of high-concentration and high-salt wastewater in large landfills
(1) Analysis of the customer’s dilemma
This customer operates a domestic waste landfill with the largest daily landfill volume in China and even in Asia. The high-concentration and high-salt wastewater it produces has complex components, including reverse osmosis concentrate, second-effect evaporation centrifugal mother liquor wastewater, and raw membrane concentrate. The previous treatment methods were exhausted when facing such difficult wastewater. The high-concentration mother liquor was like a stubborn “source of pollution”, which had a serious negative impact on the treatment system. The membrane system was frequently contaminated and scaled, resulting in a sharp decline in its filtration and separation performance and a significant shortening of its service life; the second-effect evaporator was also unable to effectively cope with the erosion of high-concentration impurities, reduced heat transfer efficiency, and poor equipment stability, and also faced the problem of shortened life. At the same time, the effluent quality is difficult to meet the discharge standards, and the high concentration of pollutants in the water continues to exceed the standard, which brings huge pressure to the subsequent environmental discharge. Frequent equipment maintenance, replacement and large-scale investment in chemical agents have caused the operating costs to rise like a snowball, casting a thick shadow on the sustainable development of the company.
(2) Winsonda Solution: Application of LT-ZQ-750 Low-temperature Evaporation Crystallizer
The LT-ZQ-750 low-temperature evaporation crystallizer developed by Winsonda is like a precise scalpel, directly hitting the key to the problem of high-concentration mother liquor treatment. Based on the advanced low-temperature evaporation principle, the equipment operates in a relatively low temperature environment, effectively avoiding the adverse effects of high temperature on wastewater components and excessive energy consumption. The precisely designed evaporation chamber and crystallizer inside can accurately control the evaporation rate and crystallization process of wastewater. By gradually evaporating water, the salt and other pollutants in the wastewater gradually reach saturation and crystallize out, realizing efficient concentration and purification of high-concentration wastewater.
(3) Excellent Results
After implementing the LT-ZQ-750 low-temperature evaporation crystallizer treatment solution, the results are remarkable. The concentration multiple of high-concentration wastewater has been successfully increased by 8 times, which means that the amount of wastewater treated by the front-end membrane system and the second-effect evaporator has been greatly reduced, and the pollutant load has been significantly reduced. The membrane system and the second-effect evaporator have been freed from the continuous erosion of high-concentration mother liquor, and their operating stability has been greatly enhanced, and their service life has been significantly extended, effectively reducing the frequency of equipment replacement and maintenance, saving the company a lot of equipment investment costs. With the improvement of treatment efficiency and the compliance of effluent water quality, the company’s pressure on environmental compliance has dropped sharply, and there is no need to pay high fines and environmental restoration costs for excessive emissions. The overall operating costs have been effectively controlled and reduced. More importantly, the company has successfully achieved the environmental protection goal of zero liquid discharge, taking a solid step forward in the field of environmental protection and becoming a model of sustainable development in the industry.
Case 2: A successful example of DTRO concentrated water treatment in a Sichuan enterprise
(1) Interpretation of the enterprise’s difficulties
This ecological and environmental protection enterprise located in Sichuan was in trouble when treating DTRO concentrated water from landfill leachate. The characteristics of DTRO concentrated water are extremely complex. High organic matter, high ammonia nitrogen, high suspended solids and high salt content make it a “hard bone” in the treatment process. The original treatment process seemed to be unable to cope with the concentrated water. The reinjected DTRO concentrated water continuously impacted the membrane system, causing the membrane pores to be blocked, the membrane pollution to increase, the membrane’s water permeability to decrease rapidly, and the life span to be sharply shortened. A large amount of water resources are bound in the concentrated water and cannot be effectively recycled. The water recovery rate continues to decline, which seriously wastes precious water resources. At the same time, the effluent water quality is turbid and various pollutant indicators are seriously exceeded. Not only does it pose a potential threat to the surrounding environment, but it also causes high operating costs due to poor treatment effects, including the consumption of a large amount of chemical agents, additional sewage treatment costs, and frequent equipment maintenance costs. The economic and environmental benefits of the enterprise have been seriously damaged.
(2) Winsonda’s response: Advantages of LT-25T low-temperature heat pump evaporator
The emergence of LT-25T low-temperature heat pump evaporator has brought a turning point for the company. The equipment is cleverly combined with the customer’s existing DTRO membrane system to form an efficient treatment system. The application of low-temperature heat pump technology enables the evaporator to operate efficiently at a lower temperature, making full use of the heat cycle of the heat pump to achieve efficient use of energy. During the treatment process, the LT-25T low-temperature heat pump evaporator first pre-concentrates the DTRO concentrated water. By precisely controlling the evaporation conditions, most of the water in the wastewater is evaporated and removed, which greatly reduces the volume of concentrated water, thereby effectively reducing the workload and difficulty of subsequent evaporation treatment. Its internal high-efficiency separation device can completely separate the water vapor generated by evaporation from the concentrated liquid, ensuring the stability and reliability of the treatment process.
(3) Remarkable results
After the introduction of the LT-25T low-temperature heat pump evaporator, the company’s DTRO landfill leachate treatment effect has achieved a qualitative leap. The concentration multiple of concentrated water has been steadily increased by 6-8 times, which greatly reduced the processing pressure of the DTRO membrane system, greatly improved the operating environment of the membrane system, and effectively extended its service life. With the substantial reduction in evaporation treatment volume, the company’s costs in equipment investment, energy consumption and chemical agent use have been significantly reduced, and the comprehensive operating costs have been effectively controlled and optimized. The effluent quality is clear and up to standard, and all pollutant indicators meet the environmental emission standards. The company has successfully gotten rid of the environmental protection dilemma and achieved a win-win situation of economic and environmental benefits. It has made positive contributions to ecological protection and environmental governance, and also provided valuable reference experience for companies in the same industry.
These two successful cases of Winsonda in the field of landfill leachate treatment fully demonstrate its outstanding strength and deep potential in environmental protection technology innovation. Through customized solutions, it not only helps companies solve practical environmental problems, but also promotes the progress and development of the entire industry in landfill leachate treatment technology, and injects strong impetus into the environmental protection goals of protecting green waters and green mountains and achieving sustainable development. In the future, Winsonda is expected to continue to lead the trend of environmental protection technology innovation and contribute more wisdom and strength to the global environmental protection cause.
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