In landfills, after several days or even years of garbage decomposition, accompanied by precipitation, surface water, and groundwater infiltration, brown black garbage leachate is produced, commonly known as "garbage soup".
The 2008 version of the standard for leachate from garbage can be called the "strictest in the world". Not only is it stricter than similar standards in most developed countries, but it is also stricter than other industries such as chemical and pharmaceutical industries in China. From first tier cities to small county towns, landfill sites and even regulatory authorities are tackling the challenge of how to meet emission standards under very strict national standards?
The environmental protection water circle has selected 24 cases of garbage leachate treatment projects for everyone. The detailed explanation is as follows:
Anhui Province Garbage Leachate Treatment Project
Case 1
Project Name: Guangzhou Huahao Energy and Environmental Protection Group Co., Ltd
Project Name: Expansion Project of Leachate Treatment for a Domestic Waste Incineration Power Generation Project in Hefei City
Project scale: 400 t/d
Running time: 2016
Processing technology: pretreatment system (pre settling tank+regulating tank)+anaerobic system (UASB)+MBR system (two-stage A/O+UF)+NF
Emission standard: The maximum allowable emission concentration of leachate treatment pollution in this project should be in accordance with the current national standard "Comprehensive Emission Standard for Leachate" (GB8978-1996) Level 1 standard, and some indicators should comply with the standards of the leachate plant in Hefei Demonstration Park
Project features: Reasonable process design, excellent construction quality, stable and compliant operation, making it a representative project of domestic waste incineration power plants
Case 2
Project Name: Wuhan Weimeng Environmental Protection Technology Co., Ltd
Project Name: Leachate Treatment Project of a Domestic Waste Landfill in a County, Anhui Province
Project scale: 120 t/d
Running time: 2016
Processing technology: pretreatment system+A/O+two-stage electrochemistry+A/O
Emission Standard: Pollution Control Standard for Landfills of Domestic Waste GB16889-2008 (Table 2)
Project features: Unlike traditional membrane processes for treating leachate, this process adopts a non membrane process of biochemistry and electrochemistry, without the production of concentrated solution!
Case Three
Project Name: Wuhan Tianyuan Environmental Protection Co., Ltd
Project Name: Bengbu Landfill Leachate Treatment Project
Project scale: 300 t/d
Operation time: Leachate in October 2011, concentrated solution in October 2015
Processing technology:
Leachate adopts "pretreatment+MBR (two-stage)+NF/RO"
The concentrated solution adopts "MVR (tube evaporator)"
Emission standards: Table 2 of the "Pollution Control Standards for Landfills of Municipal Solid Waste" (GB16889-2008)
Project features: Excellent representative in concentrated liquid treatment engineering
Hubei Province Garbage Leachate Treatment Project
Case Four
Project Name: Nanjing Wandesi Environmental Protection Technology Co., Ltd
Project Name: Yichang Xiaoting Domestic Waste Sanitary Landfill Construction Project - Leachate Treatment Station Construction Project Case
Project scale: 300 t/d leachate+100 t/d concentrate
Running time: 2016
Processing technology:
Leachate: pretreatment+A/O+MBR+NF+RO
Concentrated leachate: pretreatment+MVR evaporation process
Emission standard: The discharge water quality meets the standards in Table 2 of the "Pollution Control Standards for Landfills of Municipal Solid Waste" (GB16889-2008).
Project features: The concentrated leachate adopts the "pretreatment+MVR" process, which has mature equipment and technology, small footprint, and the ability to precipitate and recover salts. It effectively solves the problem of concentrated liquid treatment and greatly reduces secondary pollution.
Garbage leachate has the characteristics of high concentration of organic pollutants, complex composition, high concentration of ammonia nitrogen, high salt content, poor biodegradability, strong toxicity, and high content of heavy metal ions. Currently, the most commonly used process in engineering is the "pretreatment+AO-MBR+NF+RO" process, which runs stably and has good treatment effect. The final effluent can meet the standards of Table 2 or Table 3 of the "Pollution Control Standard for Landfill Sites of Domestic Waste GB16889-2008".
Beijing Municipal Solid Waste Leachate Treatment Project
Case Five
Project Name: Beijing Jielv Technology Development Co., Ltd
Project Name: Beijing Shougang Biomass Energy Waste Leachate Treatment Project
Project scale: 900 t/d
Running time: 2013
Processing technology: medium temperature anaerobic+membrane bioreactor (MBR)+nanofiltration (NF)+reverse osmosis (RO)
Emission standard: The maximum allowable emission concentration of leachate treatment pollution in this project should be in accordance with the current national standard "Comprehensive Emission Standard for Leachate" (GB8978-1996) Level 1 standard, and some indicators should comply with the standards of the leachate plant in Hefei Demonstration Park
Project characteristics: This project has the strictest treatment standards in China (CODcr<30mg/L). In 2013, it was declared as a Beijing Science and Technology Plan project and was rated as the "Development and Demonstration Project of Low Energy Consumption Treatment Technology for Leachate from Garbage Incineration Power Plants"
Shaanxi Province Garbage Leachate Treatment Project
Case Six
Project Name: Jiangsu Yunshuiyao Environmental Technology Co., Ltd
Project Name: Datong Municipal Solid Waste Incineration Plant Leachate Treatment Project
Project scale: 200 t/d
Processing technology: UASB+MVC evaporation+DI ion exchange
Emission standards: Table 2 standard of "Pollution Control Standards for Landfills of Domestic Waste" (GB16889-2008).
Project features: The recovery rate can reach up to 90%, and a small amount of concentrated liquid can be re sprayed for treatment, making it possible to achieve zero discharge treatment of leachate from incineration plants.
Shandong Province Garbage Leachate Treatment Project
Case Seven
Project Name: Beijing Tiandiren Environmental Protection Technology Co., Ltd
Project Name: Qingdao Xiaojianxi Garbage Comprehensive Treatment Plant Leachate Treatment Expansion and Renovation Project
Project scale: 900 t/d
Running time: 2011
Processing technology: "Membrane Bioreactor (MBR)+Disc Tube Reverse Osmosis (DTRO)+Aerated Zeolite Biofilter"
Emission standard: Class A of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002)
Project features: The water source comes from mixed water from incineration plants, landfills, and composting plants; High effluent discharge standards; Won the 2012 Ministry of Housing and Urban Rural Development Technology Demonstration Project
Case Eight
Project Name: Jiangsu Jinshan Environmental Protection Company
Project Name: Leachate Treatment Project of Heze Municipal Solid Waste Comprehensive Treatment Plant in Shandong Province
Project scale: 150 t/d
Processing technology: A/O+UF+NF+RO process
Emission standard: "Pollution Control Standards for Landfills of Domestic Waste" (GB16889-2008)
Project feature: Through water balance, no concentrated liquid needs to be processed
Shanxi Province Garbage Leachate Treatment Project
Case Nine
Project Name: Xinjiang Hengyi Environmental Protection Technology Co., Ltd
Project Name: Shanxi Solid Waste Disposal Center Urban Domestic Waste Leachate Treatment Project
Project scale: 100 t/d
Running time: 2011
Processing technology: pretreatment system (regulating tank+coagulation sedimentation)+anaerobic system (UASB)+SBR+MBR+RO system
Emission standard: Emission standard of "Pollution Control Standards for Landfills of Municipal Solid Waste" (GB16889-2008)
Project features: The combination of low energy consumption and high load UASB and SBR treatment process is an effective way to remove organic matter and ammonia nitrogen from leachate, and is the main treatment process of the system.
Sichuan Province Garbage Leachate Treatment Project
Case 10
Project Name: China Municipal Engineering North China Design and Research Institute
Project Name: Chengdu Solid Waste Sanitary Disposal Site Leachate Treatment Expansion Project
Project scale: 1000 t/d
Processing technology: MBR+NF+RO process is adopted, and the concentrated solution adopts coagulation precipitation+UF+AOP+BAC process
Emission standards: Table 2 of the Pollution Control Standards for Landfills of Municipal Solid Waste (GB16889-2008)
Project features: In addition to meeting the standard for leachate discharge, concentrated solution can also meet the standard for discharge
Case Eleven
Project Name: Chengdu Xingrong Group
Project Name: Chengdu Wanxing Power Plant Garbage Leachate Treatment Project
Project scale: 850 t/d
Processing technology: Adopting the "MBR+NF+RO/DTRO" process
Guangdong Province Garbage Leachate Treatment Project
Case 12
Project Name: Beijing Jielv Technology Development Company
Project Name: Zhuhai Xikengwei Landfill Leachate Treatment Phase II Project
Project scale: 660 t/d
Processing technology: "Anaerobic+Membrane Bioreactor (MBR)+Nanofiltration (NF)/Reverse Osmosis (RO)"
Emission standards: Table 2 of the Pollution Control Standards for Landfills of Municipal Solid Waste (GB16889-2008) and the effluent water quality requirements of the Guangdong Province's Water Pollution Discharge Limitation Standards (DB44/26-2001)
Project feature: Low operating costs in the same process
Case 13
Project Name: Zhuhai Water Group
Project Name: Guangdong Zhuhai Xikengwei Garbage Sanitary Landfill Leachate Treatment Station Phase II Project
Project scale: 660 t/d
Processing technology: Adopting "medium temperature anaerobic+membrane bioreactor MBR+membrane deep treatment NF/RO"
Emission standards: The wastewater discharge from the leachate treatment station complies with the stricter requirements of Table 2 of the "Pollution Control Standards for Landfills" (GB 16889-2008) and the first level standard of the second period of the "Water Pollutant Discharge Limits" (DB44/26-2001) in Guangdong Province
Jiangsu Province Garbage Leachate Treatment Project
Case 14
Project Name: Beijing Tiandiren Environmental Protection Technology Co., Ltd
Project Name: Nantong Municipal Waste Treatment Center Landfill Leachate Upgrading and Renovation Project in Jiangsu Province
Project scale: 200 t/d
Running time: 2013
Processing technology: MBR+DTRO+post-treatment+concentrated solution treatment
Emission standards: Table 3 of the "Pollution Control Standards for Landfills of Municipal Solid Waste" (GB16889-2008)
Project features: The process includes a DTZ concentrated liquid treatment system, which solves the problem of concentrated liquid.
Case 15
Project Name: Jiangsu Weili Environmental Protection Technology Co., Ltd
Project Name: Nanjing Shuige Organic Waste Treatment Plant Sewage Treatment Station Renovation and Expansion Project
Project scale: 800 t/d
Running time: 2013
Processing technology: MBR (two-stage)+NF/RO
Emission standards: Table 2 of the Pollution Control Standards for Landfills of Municipal Solid Waste (GB16889-2008)
Project features: Enhanced denitrification process, non full scale RO, generally NF effluent meets the standard, which can reduce the production of concentrated solution.
Jilin Province Garbage Leachate Treatment Project
Case 16
Project Name: Dalian Guangtaiyuan Environmental Protection Technology Co., Ltd
Project Name: Emergency Project for Leachate from Mogugou Municipal Solid Waste Sanitary Landfill in Changchun City
Project scale: 600 t/d
Running time: 2013
Processing technology: MVR evaporation
Emission standards: Table 3 of the "Pollution Control Standards for Landfills of Municipal Solid Waste" (GB16889-2008)
Project features: No biochemical process, not affected by low temperatures in northern winter.
Tianjin Municipal Solid Waste Leachate Treatment Project
Case 17
Project Name: Wuxi Hedan Environmental Protection Company
Project Name: Tianjin Binhai New Area Dagang Garbage Incineration Power Plant Leachate Treatment Project
Project scale: 300 t/d
Running time: 2013
Processing technology: CLR (anaerobic system)+HDR (high-efficiency aerobic system)+A3O3 (three-stage AO system)
Emission standard: Grade III standard of Comprehensive Wastewater Discharge Standard (DB12/356-2008)
Project features: This process belongs to the non membrane process, which can avoid membrane replacement and concentrated liquid production
Shanghai Municipal Solid Waste Leachate Treatment Project
Case 18
Project Name: Jiangsu Weili Environmental Protection Technology Co., Ltd., Sumitomo Precision Industrial Technology (Shanghai) Co., Ltd
Project Name: Shanghai Laogang Landfill Leachate Treatment Project
Project scale: 1600 t/d incineration plant leachate+1600 t/d landfill leachate
Processing technology: MBR+NF+RO/MVC process is adopted, and the concentrated solution adopts advanced ozone oxidation combination technology (SHAS) technology
Project features: Large scale, thorough treatment of concentrated solution
Zhejiang Province Garbage Leachate Treatment Project
Case 19
Project Name: Hangzhou Environment Group Co., Ltd., Qinghai Jieshen Environmental Energy Industry Co., Ltd., South China University of Technology
Project Name: Hangzhou Tianziling Landfill Leachate Treatment Project
Project scale: 1200 t/d
Processing technology: JSBC+secondary Fenton+secondary BAF
Project feature: No membrane process is used, therefore no concentrated solution is produced
Case 20
Project Name Enterprise: Zhejiang Tailai Environmental Protection
Project Name: Xiangshan Landfill Leachate Treatment Project
Project scale: 400 t/d
Processing technology: Adopting "MBR+NF+RO/AOP"
Case 21
Project Name: Shanghai Kangheng Environment Co., Ltd
Project Name: Treatment of Leachate from Garbage Incineration Plant in Yinzhou District, Ningbo City
Project scale: 800 t/d
Processing technology: "MBR+NF+RO"
Heilongjiang Province Garbage Leachate Treatment Project
Case 22
Project Name: Sande Group, Nanjing Ruijiete Membrane Separation Technology Co., Ltd
Project Name: Heilongjiang Province Urban Domestic Waste Leachate Treatment Project
Project scale: 100 t/d
Processing technology: pre-treatment system (regulating tank+coagulation sedimentation)+anaerobic system (UASB)+two-stage A/O+MBR+RO system
Emission standard: Emission standard of "Pollution Control Standards for Landfills of Municipal Solid Waste" (GB16889-2008)
Project features: Two stage A/O enhanced denitrification, efficient MBR flat membrane stable and compliant discharge
Guangxi Province Garbage Leachate Treatment Project
Case 23
Project Name: Guangxi Huadu Environmental Investment Co., Ltd., Guangxi Jinyuan Environmental Protection Technology Co., Ltd
Project Name: Leachate Treatment Project of Shanglin County Domestic Waste Sanitary Landfill
Project scale: 100 t/d
Processing technology: pretreatment (coagulation+magnetic flocculation)+"anaerobic+aerobic+MBR+ultrafiltration+reverse osmosis"
Emission standard: After the effluent water quality meets the first level standard of the "Environmental Pollution Standard for Sanitary Landfills of Domestic Waste" (GB16889-2008), it will be discharged
Project features: Ultra magnetic coagulation technology is used for pre-treatment of leachate. The leachate from garbage is treated by magnetic coagulation from the inlet to the outlet in only about 15 minutes.
Shenzhen Municipal Solid Waste Leachate Treatment Project
Case 24
Project Name: Shanghai Jingyu Environmental Engineering Co., Ltd
Project Name: Shenzhen Laohukeng Leachate Treatment Station Phase II Zero Emission Treatment Project
Project scale: 1745 t/d
Processing technology: TSMM garbage leachate concentrate specialized equipment, biochemical, anaerobic MBR、 Concentrated solution nanofiltration, reverse osmosis
Discharge standard: The effluent meets the water quality standard for use as make-up water for open circulating cooling water in the "Industrial Water Quality for Urban Wastewater Reuse" (GB/T 19923-2005).
Project features: Total effluent volume: 1736m3/d; Total recovery rate: 99.5%, used for cooling circulating water in the factory area; Organic concentration: 0.5%, resource utilization; Produce a concentrated solution with high salt content: 20%, which is then evaporated and crystallized to produce salt products.
