Pilot-scale experiment on anaerobic bioreactor landfills in China

Journal Article · Sun Jul 01 04:00:00 EDT 2007 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2006.07.008· OSTI ID:21023875

Jiang, Jianguo ^[1]; Yang, Guodong; Deng, Zhou; Huang, Yunfeng ^[1]; Huang, Zhonglin; Feng, Xiangming; Zhou, Shengyong; Zhang, Chaoping ^[2]

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1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, PR China (China)
2. Xiaping Solid Waste Landfill, Shenzhen 518019, PR China (China)

Developing countries have begun to investigate bioreactor landfills for municipal solid waste management. This paper describes the impacts of leachate recirculation and recirculation loadings on waste stabilization, landfill gas (LFG) generation and leachate characteristics. Four simulated anaerobic columns, R1-R4, were each filled with about 30 tons of waste and recirculated weekly with 1.6, 0.8 and 0.2 m{sup 3} leachate and 0.1 m{sup 3} tap water. The results indicated that the chemical oxygen demand (COD) half-time of leachate from R1 was about 180 days, which was 8-14 weeks shorter than that of R2-R4. A large amount of LFG was first produced in R1, and its generation rate was positively correlated to the COD or volatile fatty acid concentrations of influent leachates after the 30th week. By the 50th week of recirculation, the waste in R1 was more stabilized, with 931.2 kg COD or 175.6 kg total organic carbon released and with the highest landfill gas production. However, this contributed mainly to washout by leachate, which also resulted in the reduction of LFG generation potential and accumulation of ammonia and/or phosphorus in the early stage. Therefore, the regimes of leachate recirculation should be adjusted to the phases of waste stabilization to enhance efficiency of energy recovery. Integrated with the strategy of in situ leachate management, extra pre-treatment or post-treatment methods to remove the nutrients are recommended.

• OSTI ID: 21023875
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 7 Vol. 27; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AMMONIA
CARBOXYLIC ACIDS
CHEMICAL OXYGEN DEMAND
CHINA
DRINKING WATER
ENERGY RECOVERY
LANDFILL GAS
LEACHATES
PHOSPHORUS
SANITARY LANDFILLS
SIMULATION
SOLID WASTES
STABILIZATION
WASHOUT