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Addition of activated carbon to batch activated sludge reactors in the treatment of landfill leachate and domestic wastewater
Author(s) -
Aktaş Özgür,
Çeçen Ferhan
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.450
Subject(s) - leachate , nitrification , activated sludge , powdered activated carbon treatment , chemical oxygen demand , wastewater , activated carbon , chemistry , adsorption , waste management , pulp and paper industry , bioreactor , sewage treatment , sequencing batch reactor , environmental chemistry , environmental engineering , environmental science , nitrogen , organic chemistry , engineering
Leachate from a municipal landfill was combined with domestic wastewater and was treated in batch activated sludge systems. The effectiveness and applicability of the addition of Powdered Activated Carbon (PAC) to activated sludge reactors was investigated. Isotherm tests were carried out with PAC in order to estimate the extent of adsorption of organic matter onto PAC. Then, in activated sludge reactors COD (Chemical Oxygen Demand) removal and nitrification were studied both in the absence and presence of PAC for comparison purposes. In both cases, Oxygen Uptake Rates (OUR) were measured with respect to time in order to investigate substrate removal and change in microbial activity. Addition of PAC to activated sludge increased COD removal by removing mainly the non‐biodegradable fraction in leachate. The COD decreases in batch reactors were best expressed by a first‐order kinetic model that incorporated this non‐biodegradable leachate fraction. With added PAC, nitrification was also enhanced. But in all of the batch runs a significant accumulation of NO 2 ‐N took place, indicating that the second step of nitrification was still inhibited. © 2001 Society of Chemical Industry