Efficiency of Coagulation Process and Constructed Wetland for the Treatment of Municipal Solid Waste Landfill Leachate
Journal Title: Scholars Journal of Engineering and Technology - Year 2017, Vol 5, Issue 9
Abstract
Landfill leachate is a fluid that is from the external water which enter into the landfill solid waste, dissolve and rinse the dissolved materials including organic matter. It usually has high content of organic matter, electrical conductivity and high concentrations of nitrogen, toxic compounds and heavy metals. Hence, formation of landfill leachate threatens the public health and environment. Proper treatment of landfill leachate is therefore vital to remove hazardous components before discharge. Further, composition of landfill leachate varies from time to time and site to site. There are number of leachate treatment methods which have been used. Some methods are inefficient, and some are expensive and energy consuming and thus not suitable for many landfill sites, particularly in rural areas of developing countries. Assessment of available and affordable treatment methods for a particular landfill site is necessary to find out their efficiency in removing hazardous matters from the leachate. In this context, the present study was aimed to characterize the landfill leachate and to determine the efficiency of coagulation process and constructed wetland for the treatment of landfill leachate. Coagulation studies were performed with Alum and Calcium hydroxide at various doses to find the effect of coagulant type and its dose on removal of COD and turbidity. Constructed wetland vegetated with typhalatifoliawas used to assess its ability to remove COD, BOD5 and NH4-N. Landfill leachate was found to have high concentration of TDS, COD, BOD5 and NH4-N. It was observed that Alum can remove up to 50% COD at 15 g/l dose whilst Calcium hydroxide removes up to 75% COD at 20 g/l dose. More than 90% of turbidity could be removed by coagulation process using Alum and Calcium hydroxide. Constructed wetland removes more than 68% of COD, 70% of BOD5 and 50% NH4-N at seventh day of incubation. The removal efficiency increases with retention time. Keywords:Alum, Calcium hydroxide, coagulation, constructed wetland, landfill leachate
Authors and Affiliations
R. Thivyatharsan, M. Rajendran
Keywords
Related Articles
- EP ID EP385885
- DOI -
- Views 102
- Downloads 0
Determination of Tensile Stress and Bond Stress with Concrete of a Rattan (Calamus guruba)
Bangladesh is a region where abundant amount of rattan (or cane) is available of different types. This paper attempts to understand several properties of Zali bet (Calamus guruba). It is easily available in many parts of...
Prediction Method on Wellbore Stability Based on Analytic Hierarchy Process and Fuzzy Evaluation
Wellbore stability are influenced by many complex factors, and there is no commonly used prediction method on wellbore stability until now. Use of an efficient decision making technique which can take into account severa...
The "Pure Contagion" Effect between SHIBOR and Multinational Benchmark Interest Rates
By the Crisis contagion canonical model put forward by Pesaran & Pick, this paper verified whether there is a pure contagion effect between the SHIBOR and the benchmark interest rates of several representative countries,...
Existence of Positive Solutions for Nonlinear Fourth-order Boundary Value Problems
The nonlinear fourth-order boundary value problem is studied in this paper, where .The existence result of at least one positive solution to above fourth-order boundary value problem is obtained...
Design and Development of Inverted Down Draft Gasifier for Cooking Purpose
Energy is a key input for technological, industrial, social and economical development of a nation. However, a large number of consumers in domestic, agricultural, commercial and industrial sectors are faced with a situa...