Treatment of Landfill Leachate by Anammox Process

Treatment of Landfill Leachate by Anammox Process

Grzegorz Cema (Silesian University of Technology, Poland) and Adam Sochacki (Silesian University of Technology, Poland & Czech University of Life Sciences, Czech Republic)
DOI: 10.4018/978-1-5225-1037-6.ch011
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Abstract

In most cases, the anammox process is used for nitrogen removal from reject water coming from dewatering of digested sludge. However, there are more industrial streams suitable for treatment by partial nitritation/anammox process. The landfill leachate may be a good example of such wastewater. Generally, landfilling is the most used solution for treatment of urban solid wastes. The problem with landfill leachate production and management is one of the most important issues associated with the sanitary landfills. These streams are highly contaminated wastewater with a complex mixture of organic and inorganic compounds and characterized by a high ammonia content and low biodegradable organic fraction matter. The objective of this chapter is the short characteristic of landfill leachate and a short review of its treatment methods with special focus on nitrogen removal by partial nitritation/anammox process.
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Characteristics Of Landfill Leachate

Landfill leachate is generated by the rainwater infiltrating through the landfill site, the surface and groundwaters flowing into the site as well as water present in the wastes and generated as a result of organic matter degradation. The quality and the quantity of leachate is mainly related to: chemical and physical properties of waste, volumes of infiltrating water, environmental conditions, the landfill age and also storage and reclamation techniques (Christensen et al., 2001; Kulikowska & Klimiuk 2008; Müller et al., 2015).

Generally, the discharge from landfill depends on rainfall, evaporation losses and redistribution in time of infiltrating water in the soil cover and in the waste deposited. The water infiltrating into the site may be transpired to the atmosphere, evaporated from the surface soil, stored in cover soil or percolate downwards through the cover (Peyton & Schroeder 1993; Bengtsson et al., 1994). The water balance on the landfill site can be summarized as follows (Blakey, 1992):

(1) Where:L – leachate production, P – precipitation, R – surface run-off, ΔUs – change in soil moisture storage, ET – actual evaporative losses from the bare-soil/evapotranspiration losses from a vegetated surface, ΔUw – change in moisture content of the refuse components.

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