Assessment of Treatment Efficiency of Lysimeter Leachate Using Leachate Pollution Index

Document Type: Original Article


Department of Civil Engineering, Khulna University of Engineering & Technology (KUET) Khulna-9203, Bangladesh


This study illustrates the leachate treatment efficiency based on leachate pollution index (LPI) of pre- treatment leachate as well as post-treatment leachate with chemical coagulants. Leachate samples were collected at regular intervals of time from the leachate collection chamber of the landfill lysimeter at KUET campus, Bangladesh to compute its pollution potential. The landfill lysimeter consists of one open dump lysimeter-A with leachate detection (A1) and collection system (A2) as well as two sanitary landfill lysimeters B and C having two different types of cap liner. The relevant parameters of leachate sample were measured in the laboratory to evaluate sub-pollution (sub-LPIs) in terms of LPI in organic pollutant (LPIor), inorganic pollutant (LPIin) and heavy metal (LPIhm) as well as the overall LPI. Moreover, the values of LPI in pre-treatment leachate were to be found 19.53, 25.33, 23.48 and 23.74 for the A1 and A2 systems of open lysimeter-A, as well as the collection systems of sanitary lysimeters- B and C, respectively. It reveals significantly the higher values than that of LPI of 5.77, 7.38 and 7.38 for the maximum leachate discharge standards of Bangladesh, India and Hong Kong, respectively. The leachate was then treated with ferric chloride (FeCl3), poly alluminum chloride (PAC), ferrus sulphate (FeSO4) and aluminum sulphate (Al2(SO4)3) in various dosages and pH values. The concentrations in post-treatment leachate by using FeCl3  at optimum dosage were to be  found below the limit of maximum leachate discharge standards.  Study also reveals the values of LPI of 5.32, 5.69, 5.32 and 5.24 in post-treatment leachate for the A1 and A2 systems of open lysimeter-A, as well as the collection systems of sanitary lysimeters-B and C, respectively belowthe values of LPI in leachate of maximum discharge standards. Finally, it can be concluded that differences in the level of contaminants of pre- treatment and post-treatment leachate indicated the role of leachate treatment system in minimizing the level of contaminants and lowering the risk of leachate contamination based on LPI.


1.      Ehrig, H.-J.,  1983. Quality and quantity of sanitary  landfill leachate. Waste Management  & Research, 1(1): 53-68.

2.     Rafizul,   I.M.,   M.K.   Howlader   and   M.   Alamgir,   2012. Construction and evaluation  of simulated pilot scale  landfill  lysimeter in Bangladesh. Waste management, 32(11): 2068-2079.

3.     Rafizul, I.M. and M. Alamgir, 2012. Characterization and tropical seasonal variation of leachate: Results from landfill lysimeter studied. Waste management, 32(11): 2080-2095.

4.     Visvanathan,  C., J. T ränkler, P. Kuruparan and Q. Xiaoning. Influence of landfill operation and waste composition on leachate control–lysimeter experiments under tropical conditions. in 2nd Asia Pacific Landfill Symposium in Seoul, Korea. 2002.

5.     Halim, A.A., H.A. Aziz, M.A.M. Johari, K.S. Ariffin and M.N. Adlan, 2010. Ammoniacal nitrogen and COD removal from semi- aerobic landfill leachate using a composite adsorbent: fixed bed column adsorption performance. Journal of hazardous materials, 175(1): 960-964.

6.      Kumar,  D.   and   B.J.   Alappat,  2005.  Evaluating  leachate contamination potential of landfill sites using leachate pollution index. Clean T echnologies and EnvironmentalPolicy, 7(3): 190-197.

7.      Umar, M., H.A. Aziz and M.S.  Yusoff, 2010. Variability of parameters involved in leachate pollution index and determination of LPI from four landfills in Malaysia. International Journal of Chemical Engineering, 2010.

8.      Kumar, D. and B.J. Alappat. Analysis of leachate contamination potential of a municipallandfill using leachate pollution index. in Workshop on Sustainable Landfill Management. 2003.

9.     Sharma, A., S. Meesa, S. Pant, B.J. Alappat and D. Kumar, 2008. Formulation of a landfill pollution potential index to compare pollution potential of uncontrolled landfills. Waste Management & Research, 26(5): 474-483.

10.   Kumar, D. and B.  Alappat.  A technique to quantify landfill leachate pollution. in Proc., 9th International Waste Management Landfill Symposium, Cagliari, Italy, Paper. 2003.

11.   Ebeling, J.M., Sibrell, P.L., Orden, S.R. and Summerfelt, S.T., 2003. Evaluation of chemical coagulation-flocculation  aids for removal of suspended  solids  and phosphorus from  Intensive recalculating   aquaculture    effluent   discharge.    Aquaculture Engineering,, 29(1-2): 23-42.

12.   Mahmud, K.,  M.D. Hossain  and S.  Shams,  2012. Different treatment strategies  for  highly  polluted  landfill  leachate in developing countries. Waste management, 32(11): 2096-2105.

13.   APHA., Standard Methods for the Examination of Water and Wastewater   15ed1981:   APHA   American   Public    Health Association.

14.   Kumar, D. and B.J. Alappat, 2004. Selection of the appropriate aggregation  function for calculating leachate pollution  index. Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, 8(4): 253-264.

15.   Kale,  S.S.,   A.K.  Kadam,  S.  Kumar  and  N.  Pawar,  2010. Evaluating pollution potential of leachate from landfill site, from the Pune metropolitan city and its impact on shallow basaltic aquifers. Environmental monitoring and assessment, 162(1-4): 327-346.

16.   Ferdaush, J., 2013. T reatment of landfill leachate by the physico chemical methods.

17.   India, G.o., Municipal solid wastes (management and handling) rules., M.o.E.a.F. T he gazette of India, Editor 2000, Government of India: Delhi, India.

18.   Environmental Protection Department (EPD), H.K.s.a.r.H., 2005. T echnical memorandum for effluent discharged into drainage and sewage  system, inland and  coastal water,  advanced  landfill leachate  treatment  using  an  integrated  membrane  process. Desalination 149(1-3): 109-114.