The impact of leachate recirculation on municipal solid waste landfill operating characteristics
TL;DR: Landfill bioreactor technology offers important advantages in the management and treatment of municipal solid waste, including accelerated waste stabilization rates, enhanced gas production, facilitated leachate management, volume reduction and minimized long-term liability.
About: This article is published in Waste Management & Research.The article was published on 1996-08-01. It has received 271 citations till now. The article focuses on the topics: Bioreactor landfill & Waste collection.
Citations
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TL;DR: Today, the use of membrane technologies, more especially reverse osmosis (RO), either as a main step in a landfill leachate treatment chain or as single post-treatment step has shown to be an indispensable means of achieving purification.
2,178 citations
Cites background from "The impact of leachate recirculatio..."
...The eachate recycle not only improves the leachate quality, but also hortens the time required for stabilization from several decades o 2–3 years [53]....
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TL;DR: None of the individual physico-chemical techniques is universally applicable or highly effective for the removal of recalcitrant compounds from stabilized leachate, but adsorption, membrane filtration and chemical precipitation are the most frequently applied and studied worldwide.
604 citations
TL;DR: A state of art review of leachate treatment technologies, its fundamental background studies, and environmental implications confirms that the expanding of activated carbons adsorption represents a potentially viable and powerful tool, leading to the superior improvement of environmental conservation.
496 citations
TL;DR: In this article, the advantages and disadvantages of various existing leachate treatments discussed under the items: (i) Leachate channeling (combined treatment with domestic sewage, recycling) (ii) Biological processing (aerobic and anaerobic) (iii) Chemical/physical treatment (flotation, coagulation/flocculation, chemical precipitation, adsorption, ammonium stripping, chemical oxidation, ion exchange and electrochemical treatment) (iv) Membrane filtration (microfiltration, ultrafiltration and reverse osmosis).
Abstract: Problem Statement: Sanitary landfilling is the most common way to eliminate solid urban wastes. An important problem associated to landfills is the production of leachates. This study is a review of landfill leachate treatments. Approach: The advantages and disadvantages of the various existing leachate treatments discussed under the items: (i) Leachate channeling (combined treatment with domestic sewage, recycling) (ii) Biological processing (aerobic and anaerobic) (iii) Chemical/physical treatment (flotation, coagulation/flocculation, chemical precipitation, adsorption, ammonium stripping, chemical oxidation, ion exchange and electrochemical treatment) (iv) Membrane filtration (microfiltration, ultrafiltration, nanofiltration and reverse osmosis). Conclusion: The major fraction of old or biologically treated leachate was large recalcitrant organic molecules that are not easy removed during biological treatment. So that, in order to meet strict quality standards for direct discharge of leachate into the surface water, a development of integrated methods of treatment, a combination of biological, chemical, physical and membrane process steps, were required. Today, the use of membrane technologies, more especially Reverse Osmosis (RO), either as a main step in a landfill leachate treatment chain or as single post-treatment step had shown to be an indispensable means of achieving purification.
250 citations
TL;DR: Electrochemical oxidation can be employed as a complementary treatment system with biological process for conventional landfill leachate treatment as well as a standalone system for ammonium nitrogen removal from bioreactor landfill leachesate, according to the conclusion.
194 citations
References
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01 Jan 1973
131 citations
"The impact of leachate recirculatio..." refers background in this paper
...However, a nonlinear regression of chronological, declining COD data was performed for a series of laboratory studies of leachate recirculation and conventional, single-pass operations (Pohland 1975; Pohland 1980; Tittlebaum 1982, Pohland et al. 1992)....
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TL;DR: In this article, a 699-day test period was used to evaluate leachate production from shredded municipal soil wastes and its stabilization and associated gas production monitored over a six-week test period.
Abstract: Leachate production from shredded municipal soil wastes and its stabilization and associated gas production monitored over a 699-day test period have indicated that once leachate is generated and recycled, rapid conversion of readily available organic constituents occurs. The landfill thereby serves as an anaerobic biochemical stabilization process which promotes sequential conversion of complex materials through intermediates to final end products. The overall results indicate that leachate recycle will enhance predictability and accelerate stabilization of readily available organic constituents with increased rates of gas production. Decreasing the time required for stabilization to a matter of months rather than years provides attractive alternatives for better operational control, energy recovery and rapid realization of potentials for land reclamation and ultimate use without some of the uncertainties associated with conventional landfill management practices.
124 citations
"The impact of leachate recirculatio..." refers background in this paper
...However, a nonlinear regression of chronological, declining COD data was performed for a series of laboratory studies of leachate recirculation and conventional, single-pass operations (Pohland 1975; Pohland 1980; Tittlebaum 1982, Pohland et al. 1992)....
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TL;DR: Leachate recirculation has been shown in lysimeter, pilot-scale and full-scale investigations to reduce the time required for waste stabilization, improve leachate quality, and to enhance the rate of gas production as mentioned in this paper.
121 citations
TL;DR: In this article, the authors demonstrate the beneficial effect of leachate circulation for cell stabilization in sanitary landfills and show that the added capital and operational costs that such a recirculation implies must be weighed against the benefits of accelerated stabilization before they can be incorporated into actual design practice.
Abstract: The study presented in this paper commenced in 1972, to test the hypothesis that stabilization of refuse in a sanitary landfill can be accelerated by the controlled application of moisture with a resulting reduction in the time during which the landfill presents a potential source of pollution. The scope of the project reported here was limited to a field study of five large field units maintained under different moisture regimes. The results of this study demonstrate the beneficial effect of leachate circulation for cell stabilization. The added capital and operational costs that such a recirculation implies must be weighed against the benefits of accelerated stabilization before they can be incorporated into actual design practice.
118 citations
"The impact of leachate recirculatio..." refers background in this paper
...of its waste depth, while dry cells settled less than 8% (Leckie et al. 1979)....
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98 citations