کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4472134 | 1315058 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Different treatment strategies for highly polluted landfill leachate in developing countries Different treatment strategies for highly polluted landfill leachate in developing countries](/preview/png/4472134.png)
The aim of this research was to determine appropriate treatment technique for effective treatment of heavily polluted landfill leachate. We accomplished several treatment experiments: (i) aerobic biological treatment, (ii) chemical coagulation, (iii) advanced oxidation process (AOP) and (iv) several combined treatment strategies. Efficiency of these treatment procedures were monitored by analysing COD and colour removal. Leachate used for this study was taken from Matuail landfill site at Dhaka city. With extended aeration process which is currently used in Matuail landfill site for leachate treatment, maximum COD and colour removal of 36% and 20%, respectively could be achieved with optimum retention period of 7 days. With optimum aluminium sulphate dose of 15,000 mg/L and pH value of 7.0, maximum COD and colour removals of 34% and 66%, respectively were observed by using chemical coagulation. With optimum pH of 5.0 and optimum dosages of reagents having H2O2/Fe2+ molar ratio of 1.3 the highest removal of COD and colour were found 68% and 87%, respectively with sludge production of 55%. Fenton treatment which is an advanced oxidation process was the most successful between these three separate treatment procedures. Among the combined treatment options performed, extended aeration followed by Fenton method was the most suitable one.
► We use several treatment processes to remove organic matter from leachate.
► We perform aeration, coagulation, Fenton process and some combined strategies.
► Extended aeration is not a fully satisfactory treatment option for Matuail leachate.
► Fenton treatment is the most suitable between all three separate treatment methods.
► Extended aeration followed by Fenton process was the most appropriate one.
Journal: Waste Management - Volume 32, Issue 11, November 2012, Pages 2096–2105