International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 07 | July-2017
p-ISSN: 2395-0072
www.irjet.net
Study On Treatment Of Municipal Solid Waste Landfill Leachate By Fenton Process Bhavani S1, M.V Kanthi2 1PG
student, Department of Civil Engineering, Angadi Institute of Technology and Management, Belagavi-590009, Karnataka, India. 2Head Of Department, Department of Civil Engineering, Angadi Institute of Technology and Management, Belagavi-590009, Karnataka, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Experimental study has been carried out for the
treatment of municipal solid waste landfill leachate waste water by fenton process. Hydrogen peroxide and swarf is used as fenton reagent for the oxidation of pollutants. Fenton process is most effective in degradation of biodegradable and non-biodegradable organic matter in landfill leachate. By varying the depth of swarf i.e. 5cm, 10cm and 15cm study has been carried out. Physico-chemical analysis was carried on raw and treated leachate wastewater to know the efficiency of swarf in removing contaminants. The experimental studies reveal that the swarf of 10cm depth is more efficient in removing pollutants when compared to 5cm and 10cm depth of swarf. Finally obtained effluent characteristics are within limit according to Indian standards which can be discharged for land to irrigation. Key Words: Depth of swarf, Fenton process, leachate wastewater, Removal of pollutants.
1. INTRODUCTION Due to rapid urbanization and industrial growth led to the formation of municipal, plastic, hazardous and biomedical waste in huge quantities. With the production of waste causes pollution to air, water and soil. In developing countries the rise of municipal solid waste is increasing day by day [1]. The landfill is the most common technology used to dispose municipal solid residues in developing countries [2]. These MSW is dumped on land in more or less uncontrolled manner. An important problem associated with landfill is the production of leachate. Due to natural humidity, rainfall and water present in residue of organic matter generates the production of leachate. Generally leachate contains high concentrations of inorganic ions and soluble organic matter. If leachate is not treated properly and if it is discharged directly in to environment, there will be severe ill effects on soil, water and as well as to mankind. Landfill effluents (leachate) need to be treated on site to meet the standards for its discharge into the server or its direct disposal into surface water [3]. Leachate is a liquid which is drained or leached from landfill. A leachate is generally characterized by a strong odor and a dark color as well as retaining a large number of contaminants [4].It is a mixture of inorganic and organic substances. The concentration and composition of Š 2017, IRJET
|
Impact Factor value: 5.181
|
contaminants of leachate is influenced by what kind of landfill waste and its age. Leachate consists of mixture of organic and inorganic compounds associated with pathogenic microorganisms. The treatability of the leachate depends on its composition and characteristics, which are influenced by the type of waste and the age of the landfill [5] [6]. Release of untreated leachate in to environmental cause’s harmful effects on human life which lasts for decays. In land filling operation, management and treatment of leachate is an important standard operation. Leachate is classified based on age of landfill as young and old leachate. For young leachate the concentration of COD will be >10,000 mg/l while COD will be less than 30,000 mg/l for landfills older than 10 years [1]. Leachate characteristics mainly depend on the type of waste, age of landfill and moisture content. Based on type of waste leachate may have higher concentration of calcium as well as alkalinity. Landfill leachate which has ash mono fill is dominated by calcium components with varying amounts. Ash mono fill leachate has higher ionic strength which increases the solubility of minerals and decreases the formation of solid particles. MSW and combustion leachate is dominated by higher level of alkalinity [1]. Due to higher level of alkalinity there is a formation of mineral precipitate. The main characteristics of leachate which effects the environment are BOD, COD, ammonia, chloride, pH, manganese and zinc [2]. Leachate acts a medium for transfer of pollutants from landfill in to surface and ground water. Due to infiltration and passage of water through solid waste with combination of chemical, physical and microbial process led to the transfer of pollutants from waste materials in to water and then forming leachate. Leachate has higher organic strength i.e. 100 times more than raw sewage. Due to varieties of waste huge mixture of chemicals are present in leachate. Because of its high range of contaminants, it can destroy huge aquifers through its migration to ground water. Leachate migration can only possible by unlined and no leachate collection systems in landfills. Pollution of leachate can be only avoided by lining of landfills and treatment.
ISO 9001:2008 Certified Journal
|
Page 2375