Research on leachate recirculation from different types of landfills.
Landfills can produce a great amount of leachate containing highly concentrated organic matter. This is especially true for the initial leachate from landfilled municipal solid wastes (MSW) that generally has concentrations of COD(Cr) and BOD(5) up to 80,000 and 50,000mg/L, respectively. The leachate could be disposed by means of recirculating technique, which decomposes the organics through the action of proliferating microorganisms and thereby purifies the leachate, and simultaneously accelerates organic decomposition through water saturation control. Data from experimental results indicated that leachate recirculating could reduce the organic concentration considerably, with a maximum reduction rate of COD(Cr) over 95%; and, using a semi-aerobic process, NH(3)-N concentration of treated leachate could be under 10mg/L. In addition, the organic concentration in MSW decreased greatly.
Wang
Qi
Q
Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, No. 8 of Dayangfang, Chaoyang District, Beijing 100012, China. wangqi@craes.org.cn
Matsufuji
Yasushi
Y
Dong
Lu
L
Huang
Qifei
Q
Hirano
Fumiaki
F
Tanaka
Ayako
A
D000332:Aerobiosis; D000641:Ammonia / Q000032:analysis; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D009576:Nitrobacter / Q000378:metabolism; D009606:Nitrosomonas / Q000378:metabolism; D010100:Oxygen / Q000032:analysis / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
D014874:Water Pollutants, Chemical; D000641:Ammonia; D010100:Oxygen