Abstract
Despite the huge current challenges in sewage sludge treatment and disposal in China, anaerobic sludge stabilisation (AnSS) is still not a state-of-the-art process in WWTP in the country. However, the potential benefits of anaerobic sludge stabilisation may outweigh the drawbacks. One of these drawbacks is the backload from the sludge liquor that increases the nutrient load in the biological treatment stage. This work shows via computer modelling that not only can the sludge production and disposal costs be significantly reduced, but also that, with sensible automation and operational strategies (e.g., bypass of primary clarifiers, use of a centrate dosing strategy, incorporation of ammonium nitrogen sensors, etc.), the effects of the backload can be counteracted for nitrogen removal, even considering that wastewater in China often has an unfavourable C/N ratio for nitrogen removal. The tested strategies would even improve the overall plant performance in terms of norm compliance, sludge production, energy use, and energy production
Funder
Federal Ministry of Education and Research
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous)
Reference30 articles.
1. Biologische Stabilisierung von Klärschlamm: Merkblatt DWA-M 368,2014
2. Wastewater Engineering: Treatment and Resource Recovery;Tchobanoglous,2014
3. Umstellung von Kläranlagen auf Schlammfaulung: Energetisches und Ökonomisches Optimierungspotenzial;Gretzschel,2014
4. Current state of sludge production, management, treatment and disposal in China
5. Development, current state and future trends of sludge management in China: Based on exploratory data and CO2-equivaient emissions analysis
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献