Scientific basis of dissolved organic carbon limitation for landfilling of municipal treatment sludge - Is it attainable and justifiable?
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
Pergamon-Elsevier Science Ltd
Access Rights
info:eu-repo/semantics/closedAccess
Abstract
This study evaluated the scientific and technical basis of the dissolved organic carbon (DOC) limitation imposed on municipal sludge for landfilling, mainly for assessing the attainability of the implemented numerical level. For this purpose, related conceptual framework was analyzed, covering related sewage characteristics, soluble microbial products generation, and substrate solubilization and leakage due to hydrolysis. Soluble COD footprint was experimentally established for a selected treatment plant, including all the key steps in the sequence of wastewater treatment and sludge handling. Observed results were compared with reported DOCs in other treatment configurations. None of the leakage tests performed or considered in the study could even come close to the prescribed limitation. All observed results reflected 10-20 fold higher DOC levels than the numerical limit of 800 mg/kg (80 mg/L), providing conclusive evidence that the DOC limitation imposed on municipal treatment sludge for landfilling is not attainable, and therefore not justifiable on the basis of currently available technology. (C) 2014 Elsevier Ltd. All rights reserved.
Description
Keywords
Dissolved organic carbon, EU legislation, Hydrolysis, Landfilling, Municipal sludge, Soluble microbial product, Waste-Water Characterization, Soluble Microbial Products, Activated-Sludge, Sewage-Sludge, Cod Fractionation, Respirometric Assessment, Temperature, Hydrolysis, Biodegradability, Removal
Journal or Series
Waste Management
WoS Q Value
Q1
Scopus Q Value
Q1
Volume
34
Issue
9
