<p>The purpose of this paper is to study the influence of waste age on quality of leachate leaching out from sanitarythat yield various pollutants that pose environmental pollution to soil and groundwater.</p>

This thesis deals with the treatment of urban landfill leachate by partial nitritation SBR (Sequencing Batch Reactor) technology as a preparative step for an anammox reactor.

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.

This study shows that the use of a landfill as a bioreactor for the conversion of nitrate to a harmless byproduct, nitrogen gas, is technically viable.

Removal of microorganisms from water due to passage through soil is of great importance in drinking water production. In the present study, results of laboratory experiments for the study of this issue are presented.