Perspectives on Biological Treatment of Sanitary Landfill Leachate

Abstract

Landfilling, one of the prevailing worldwide waste management strategies, is presented together with its benefits and environmental risks. "side from biogas, another non-avoidable product of landfilling is landfill leachate, which usually contains a variety of potentially hazardous inorganic and organic compounds. It can be treated by different physico-chemical and biological methods and their combinations. The composition and characteristics of landfill leachate are presented from the aspect of biotreatability. The treatment with activated sludge, mainly consisting of bacterial cultures under aerobic and anaerobic conditions in various reactor systems, is explained, including an extensive literature review. The potential of fungi and their extracellular enzymes for treatment of municipal landfill leachates is also presented, with a detailed review of the landfill leachate treatment studies. The future perspectives of biological treatment are also discussed.

Removal efficacy of toxic metals in leachate through micro-organisms isolated from the natural environment

“…Conventional treatment methods, although effective, are environmentally harmful to landfill leachate treatment and are also technologically expensive (Dursun 2006;Fan et al 2008;Hermosilla et al 2009). Although many chemical and physical methods have been used to treat leachate (Akgul et al 2013;Gotvajn and Pavko 2015), many authors have confirmed, for example, the ability of carbon as an adsorbent to remove various inorganic and organic pollutants (Al-Saadi et al 2013;Saleh and Gupta 2014). The use of adsorbents is a widely accepted approach for removing pollutants from wastewater.…”

Kinetics of the Organic Compounds and Ammonium Nitrogen Electrochemical Oxidation in Landfill Leachates at Boron-Doped Diamond Anodes

“…The probable presence of non-biodegradable emerging pollutants is also of concern. The outcome is thus unsatisfactory and requires the inclusion of an additional treatment step to meet the discharging standards [13][14][15][16]. Recently, AOPs are considered to be among the most efficient methods in disinfecting and purifying ground water and natural water, as well as being used in wastewater treatment [17,18].…”