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RISS 인기검색어
- 검색키워드
- 저자 : Abdelhadi Makan (검색결과 2 건)
- 무료
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Solid household waste characterization and fresh leachate treatment
Fatima Benyoucef,Abdelhadi Makan,Abderrahman El Ghmari,Aziz Ouatmane 대한환경공학회 2015 Environmental Engineering Research Vol.20 No.4
This study aims to characterize solid household waste and to present physicochemical characteristics of fresh leachate before landfilling in Kasba Tadla city, Morocco. Obtained results show that household waste produced in 2013 were about 11,787 tons, or 0.27 tons/capita/year. These wastes were composed essentially of organic materials (74%), paper (8%), plastics (9%), metals (1%), and glass (0.5%). However, monthly produced leachate ranges from a maximum of 130.92 ㎥ during summer and a minimum of 21.88 ㎥ in winter. Moreover, leachate treatment using Upflow Anaerobic Sludge Blanket technique was accompanied by a decrease in electrical conductivity, certainly related to leachate-sediment chemical exchanges. Otherwise, the same acidity reduction phenomenon occurs when pH value increased from 4.49 to 6.17 after 24 hours, confirming the system response since the early stages of treatment. In addition, temporal evolution of the treatment efficiency in terms of COD highlighted a very important reduction which reached 94% after 5 days with an average temperature of 25℃.
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Influence of hydraulic retention time on biogas production during leachate treatment
Souaad Baati,Fatima Benyoucef,Abdelhadi Makan,Abdelaziz El Bouadili,Abderrahmene El Ghmari 대한환경공학회 2018 Environmental Engineering Research Vol.23 No.3
The main objective of this study is to investigate the influence of hydraulic retention time (HRT) on biogas production during leachate treatment using an anaerobic reactor type Upflow Anaerobic Sludge Blanket. For this purpose, four HRTs ranging from 12 to 48 h were experienced. The obtained results showed that higher amount of biogas could be produced during longer HRTs. However, HRTs longer than 48 h could not affect clearly the biogas generation and considered as unnecessary given the small additional amount of biogas produced during the degradation process. A volume of 0.434 L/Lleachate/d was achieved during the treatment with a HRT of 48 h. The higher biogas production, the smaller chemical oxygen demand (COD) values achieved. Besides, COD removal and biogas production positively correlate, showing that the active biomass has degraded effectively the organic load to produce biogas. Moreover, all the analyzed physicochemical parameters have experienced a decrease after 48 h except for the pH, which increased to approximately neutral value. More precisely, a decrease of 93.8%, 89.7%, 95%, 70%, 77%, and 84.4% was recorded for COD, electrical conductivity, total suspended solid, turbidity, NH₄⁺-N, and NO₃⁻-N, respectively.
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