eprintid: 4574 rev_number: 22 eprint_status: archive userid: 351 dir: disk0/00/00/45/74 datestamp: 2016-01-15 02:06:22 lastmod: 2021-08-27 17:15:23 status_changed: 2016-01-15 02:06:22 type: monograph metadata_visibility: show item_issues_count: 2 creators_name: Masliev, I. creators_name: Somlyody, L. creators_name: Koncsos, L. creators_id: 1488 creators_id: 1437 title: On Reconciliation of Traditional Water Quality Models and Activated Sludge Models ispublished: pub internal_subjects: iis_mod internal_subjects: iis_wat abstract: Models of the oxidation of organic material developed for river water quality management and for biological wastewater treatment differ widely in state variables and process descriptions due to their development history, environmental conditions and the objectives of the two approaches. The IAWPRC/IAWQ Activated Sludge Model No. 1 (ASM-I) resulted from a coordinated effort of a dedicated specialist group at the mid 1980s and thus free of the inconsistencies inherent in ambient water quality models such as QUAL2E developed in the course of the past three decades. The reconciliation of the ASM-1 and QUAL2E attempted in the present work may help in developing integrated pollution abatement strategies considering treatment and riverine processes in a unified way. It is shown that, after some modifications, a model similar to ASM-1 can be successfully applied to riverine conditions. It is also demonstrated that simple first-order kinetics models (such as the Streeter-Phelps and extended Streeter-Phelps ones) can be derived from the ASM-1 and QUAL2E as their asymptotic forms under the assumption that "fast" variables attain their long-term equilibrium levels. Models of ASM-1 type should, therefore, be applied when there are abrupt temporal or spatial changes in the system, otherwise simpler models adequately reflect the behavior of the oxidation system. Finally, an international effort to develop a standardized and improved river water quality model following the procedure of ASM-I looks more than desirable. date: 1995-02 date_type: published publisher: WP-95-018 iiasapubid: WP-95-018 price: 10 creators_browse_id: 1436 creators_browse_id: 1584 full_text_status: public monograph_type: working_paper place_of_pub: IIASA, Laxenburg, Austria pages: 36 coversheets_dirty: FALSE fp7_type: info:eu-repo/semantics/book citation: Masliev, I. , Somlyody, L. , & Koncsos, L. (1995). On Reconciliation of Traditional Water Quality Models and Activated Sludge Models. IIASA Working Paper. IIASA, Laxenburg, Austria: WP-95-018 document_url: https://pure.iiasa.ac.at/id/eprint/4574/1/WP-95-018.pdf