Landfill Leachate Biological Treatment

Ehrig, H. I. 1984. Treatment of sanitary landfill leachate biological treatment. Waste Manage. Res. 2(2) 131-52 cited in Chem. Abstr. CA 102(2) 11727L... 

Irvine, R.L., S.A. Sojka and J.F. Colaruotolo. Enhanced Biological Treatment of Leachates from Industrial Landfills. Hazardous Waste, Vol 1, No. l,1984.pp. 123-135. 

Mureebe, A.K., D.A. Busch and P.T. Chen. Anaerobic Biological Treatment of Sanitary Landfill Leachate. In Hazardous Wastes and Hazardous Materials, Atlanta, Georgia, 1986. 

Fortuitous or co-metabolic biodegradation may account for a significant portion of the removal of xenobiotics in the environment.24 Numerous examples of co-metabolic activity have been described for pure substrates,22 but co-metabolism has been very difficult to demonstrate in mixed-substrate, mixed-culture systems, because products of the co-metabolic reactions of one species may be degraded by another.24 To encourage co-metabolism, easily degradable co-substrates should be included in the leachate prior to biological treatment. Fatty acids, which often occur in landfill leachates, may fulfill this requirement. 

The key issues in developing an effective biological landfill leachate treatment process are the following ... 

Case 2 Comparison of Two Biological Treatment Processes Using Attached-Growth Biomass for Sanitary Landfill Leachate Treatment... 

Loukidou, M.X. and Zouboulis, A.I., Comparison of two biological treatment processes using attached-growth biomass for sanitary landfill leachate treatment, Environ. Pollut., Ill, 273-281, 2000. 

Venkataramani ES, Ahlert RC, Corbo P. 1984. Biological treatment of landfill leachates. CRCCritRev Environ Control 14 333-376. 

Methods developed for treatment of landfill leachates can be classified as physical, chemical and biological, which are usually used in combinations in order to improve the treatment efficiency. Biological treatment methods used for the leachate treatment can be classified as aerobic, anaerobic and anoxic processes which are... 

Kargi, E., Pamukoglu, M.Y. 2004a. Adsorbent supplemented biological treatment of pre-treated landfill leachate by fed-batch operation. Biores Technol 94 285-291. 

Otto Aqua-Tech HCR [High-Capacity Reactor] A high-intensity biological treatment process for purifying effluents from food processing, certain industrial processes, and landfill leachate. The waste is circulated rapidly through a vertical loop reactor, and air is injected at the top. Invented at the Technical University of Clausthal-Zellerfeld developed and commercialized by Otto Oeko-Tech. Eleven plants had been installed in Germany and Italy by 1991. See also Deep Shaft, Biobor HSR. 

Many of the treatments effected by chemical addition may also be achieved by biological treatment, and biological treatment is currently favoured by most landfill operators as the most appropriate means of reducing the leachate-associated hazard. 

Treatments of landfill leachate in a two-stage RO system with biological pre-treatment have been also proposed (Linde et al., 1995). In this case tubular membranes were used in the first step to reduce membrane fouling of RO spiral wound membranes used in the second stage. An improvement of this process can be obtained by replacing the RO unit in the first stage by a NF unit with a consequent decrease in operating costs (Peters, 1998). 

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