Environmental pollution size of the Bishkek Solid Waste Landfill and treatment of generated leachate wastewater

Authors : Venera EDİLBEK KYZY, Nurzat SHAYKİEVA, Kubat KEMELOV, Mustafa DOLAZ, Mehmet KOBYA

Pages : 122-128

Doi:10.51354/mjen.928670

View : 18 | Download : 11

Publication Date : 2021-12-06

Article Type : Research Paper

Abstract : The disposal of municipal solid wastes insert ignore into journalissuearticles values(MSW); is one of the important issues today. The MSW is generally disposed of in a landfill. The disintegration of wastes in landfill generates the wastewater known as leachate and it became one of the budding environmental impacts. The landfill leachate seeps into natural ponds next to the Bishkek insert ignore into journalissuearticles values(Kyrgyzstan); landfill. The MSWs are dumped with an irregular landfill in Bishkek, and it has been observed that this situation creates many environmental pollution problems insert ignore into journalissuearticles values(air pollution due to the combustion of wastes and generated biogas, due to leakage of leachate from the landfill); around the landfill. The leachate in the ponds is not treated and leaks into the environment. In this study, the potential of the coagulation-flocculationinsert ignore into journalissuearticles values(CF); and electrooxidation insert ignore into journalissuearticles values(EO); processes was investigated for the treatment of leachate from the sanitary landfill located in Bishkek-Kyrgyzstan. The initial COD insert ignore into journalissuearticles values(1400 ± 50 mg/L);, TOC insert ignore into journalissuearticles values(540 ± 15 mg/L);, and ammonia nitrogen insert ignore into journalissuearticles values(315 ± 10 mg/L); from landfill leachate were treated by the CF process as 33, 23, and 14% at pH 6.5 with alum dosage of 5 g/L, and 40, 29 and 10.1% at pH 8.5 with ferric chloride dosage of 5 g/L, respectively. Removal efficiencies at applied currents of 1.0, 3.0, and 5.0 A with an EO reactor using boron-doped diamond insert ignore into journalissuearticles values(BDD); plate anode and stainless steel insert ignore into journalissuearticles values(SS); plate cathode were 67.20, 88.30, and 97.90% for COD, 60.10, 85.38, and 95.53% for TOC, and 48.9, 94.6 and 99.8% for ammonia nitrogen, respectively. As a result, it was seen that Bishkek’s irregular solid waste landfilling leachate, which causes environmental pollution, was effectively treated with the EO process. By establishing a regular landfill, Bishkek municipal solid wastes must be disposed of in the landfill and treated of the leachate.
Keywords : Solid waste landfill, landfill leachate treatment, coagulation, electrooxidation