Scientific basis of dissolved organic carbon limitation for landfilling of municipal treatment sludge – Is it attainable and justifiable? |
| |
Authors: | S Sözen E Ubay Cokgor G Insel D Okutman Tas H Dulkadiroglu C Karaca A Filibeli S Meric D Orhon |
| |
Institution: | 1. Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey;2. ENVIS Energy and Environmental Systems Ltd., ITU Ar? Teknokent, Ar? 1 Binas?, 16, 34469 Maslak, Istanbul, Turkey;3. Engineering Faculty, Environmental Engineering Department, Dokuz Eylul University, 35160 Buca, Izmir, Turkey;4. Çorlu Engineering Faculty, Environmental Engineering Department, Namik Kemal University, Çorlu, Tekirday, Turkey |
| |
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. |
| |
Keywords: | Dissolved organic carbon EU legislation Hydrolysis Landfilling Municipal sludge Soluble microbial product |
本文献已被 ScienceDirect 等数据库收录! |
|