Volume 9, Issue 2 (9-2016)                   ijhe 2016, 9(2): 197-210 | Back to browse issues page

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Mousavi S, Parvaneh M. Evaluating the Effect of Powdered Activated Carbon (PAC) on the Efficiency of Leachate Treatment by Aerobic Sequencing Batch Reactor (ASBR). ijhe. 2016; 9 (2) :197-210
URL: http://ijhe.tums.ac.ir/article-1-5453-en.html
1- PhD Environmental Engineering, Department of Environmental Health Engineering, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran , seyyedarm@yahoo.com
2- MSc Environmental Health Engineering, Faculty of Health, Member of the Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
Abstract:   (2859 Views)

Background and Objectives: Conventional methods of leachate treatment are inefficient due to high pollution loads and characteristics of the leachate. In recent years, an integrated method has been developed considerably. The aim of this research was to evaluate the effect of powdered activated carbon on the treatment of landfill leachate of Kermanshah City by a columnar aerobic sequencing batch reactor.

Materials and Methods: This study was carried out in three reactors having a total volume of 2000 mL and each having an effective volume of 600 mL in the bench scale. To the reactors 2 and 3 that were similar from environmental conditions and operation point of view with reactor 1 (with no carbon powder), 5 and 10 g/L of PAC were added, respectively. The effects of different doses of PAC (0, 5, 10 g/L) and hydraulic detention times (HRT = 48, 96, 144 h) were investigated in order to remove the Chemical Oxygen Demand (COD) and ammonia nitrogen (NH3-N) from the leachate. The efficiency was investigated using two -way ANOVA test in SPSS software (Ver. 16).

Results: The results of two-way ANOVA showed that there was a significant difference (P-value=0.001) between the removal efficiency of COD and NH3–N at different HRTs with different doses of PAC. The highest removal efficiency achieved at HRT=144 h for COD and NH3-N was in Reactor 1 were 50.11 ± 4.42 and 19.85 ± 1.49%; in reactor 2: 55.67 ± 1.6 and 25.7 ± 0.89%; and in reactor 3: 58.02 ± 3.99and 25.48 ± 1.7%, respectively.

Conclusion: It can be concluded that the combination of biological - activated carbon compared with the biological process, can remove COD and NH3–N of strong sewages such as landfill leachate, although achieving standard treatments using this method is not possible.

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Type of Study: Research | Subject: wastewater
Received: 2015/05/1 | Accepted: 2016/05/2 | Published: 2016/09/18

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