Study on Treatment Technology of Mature Landfill Leachate

2011 ◽  
Vol 365 ◽  
pp. 155-159
Author(s):  
Xuan Bai ◽  
Xiao Min Hu ◽  
Ming Jun Shan ◽  
Da Wei Pan ◽  
Yan Qiu Wang ◽  
...  
Keyword(s):  
Energy Saving ◽  
Organic Pollutants ◽  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Physicochemical Process ◽  
Treatment Technology ◽  
Removal Rates ◽  
Mature Landfill Leachate

An energy saving processes was developed on the treatment of mature landfill leachate. The process adopted biochemical and physicochemical process to deal with COD and NH3-N which were the main pollutant indexes according to the characteristics of mature landfill. The experimental wastewater was from leachate pond of Anshan Yang’eryu landfill. The principle and course of simultaneous nitrogen removal and degradation of organic pollutants were elucidated. For the treated landfill leachate by the process, COD and TN removal rates reached over 95% and 65%, respectively, reaching the first class standard of “Sewage Comprehensive Discharging Standard”(GB8978-1996) for china.

The ecological filter system for treatment of decentralized wastewater

2016 ◽  
Vol 74 (7) ◽  
pp. 1553-1560
Author(s):  
Kun Zhong ◽  
Yi-yong Luo ◽  
Zheng-song Wu ◽  
Qiang He ◽  
Xue-bin Hu ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Organic Pollutants ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Nitrogen And Phosphorus ◽  
Treatment Technology ◽  
Removal Rates ◽  
Carbon Nitrogen Ratio ◽  
Ecological Filter ◽  
Aerated Filter

A vertical flow constructed wetland was combined with a biological aerated filter to develop an ecological filter, and to obtain the optimal operating parameters: The hydraulic loading was 1.55 m3/(m2·d), carbon–nitrogen ratio was 10, and gas–water ratio was 6. The experimental results demonstrated considerable removal efficiency of chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) in wastewater by the ecological filter, with average removal rates of 83.79%, 93.10%, 52.90%, and 79.07%, respectively. Concentration of NH4+-N after treatment met the level-A discharge standard of GB18918-2002. Compared with non-plant filter, the ecological filter improved average removal efficiency of COD, NH4+-N, TN, and TP by 13.03%, 25.30%, 14.80%, and 2.32%, respectively: thus, plants significantly contribute to the removal of organic pollutants and nitrogen. Through microporous aeration and O2 secretion of plants, the ecological filter formed an aerobic–anaerobic–aerobic alternating environment; thus aerobic and anaerobic microbes were active and effectively removed organic pollutants. Meanwhile, nitrogen and phosphorus were directly assimilated by plants and as nutrients of microorganisms. Meanwhile, pollutants were removed through nitrification, denitrification, filtration, adsorption, and interception by the filler. High removal rates of pollutants on the ecological filter proved that it is an effective wastewater-treatment technology for decentralized wastewater of mountainous towns.

Fast startup of one-stage nitritation-ANAMMOX reactor for high-rate nitrogen removal from mature landfill leachate

2019 ◽  
Vol 149 ◽  
pp. 1-10 ◽  
Author(s):  
Huosheng Li ◽  
Shaoqi Zhou ◽  
Yujie Qin ◽  
Jianyou Long ◽  
Fanson Zheng ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Landfill Leachate ◽  
High Rate ◽  
One Stage ◽  
Mature Landfill Leachate
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