通过使用游离亚硝酸的污泥处理实现能源正向的废水处理
Towards energy positive wastewater treatment by sludge treatment using free nitrous acid.
作者信息
Wang Qilin, Hao Xiaodi, Yuan Zhiguo
机构信息
Advanced Water Management Centre (AWMC), The University of Queensland, QLD 4072, Australia.
Key Laboratory of Urban Stormwater System and Water Environment/R&D Centre for Sustainable Wastewater Treatment (Beijing University of Civil Engineering and Architecture), Ministry of Education, Beijing 100044, PR China.
出版信息
Chemosphere. 2016 Feb;144:1869-73. doi: 10.1016/j.chemosphere.2015.10.069. Epub 2015 Nov 11.
Free nitrous acid (FNA i.e. HNO2) was revealed to be effective in enhancing biodegradability of secondary sludge. Also, nitrite-oxidizing bacteria were found to be more susceptible to FNA than ammonium-oxidizing bacteria. Based on these findings, a novel FNA-based sludge treatment technology is proposed to enhance energy recovery from wastewater/sludge. Energy analysis indicated that the FNA-based technology would make wastewater treatment become an energy generating process (yielding energy at 4 kWh/PE/y; kWh/PE/y: kilowatt hours per population equivalent per year), rather than being a large energy consumer that it is today (consuming energy at 24 kWh/PE/y). Importantly, FNA required for the sludge treatment could be produced as a by-product of wastewater treatment. This proposed FNA-based technology is economically and environmentally attractive, and can be easily implemented in any wastewater treatment plants. It only involves the installation of a simple sludge mixing tank. This article presents the concept of the FNA-based technology.
游离亚硝酸（即FNA，HNO2）被证实对提高二级污泥的生物降解性有效。此外，发现亚硝酸盐氧化细菌比氨氧化细菌对游离亚硝酸更敏感。基于这些发现，提出了一种基于游离亚硝酸的新型污泥处理技术，以提高从废水/污泥中回收能量的效率。能量分析表明，基于游离亚硝酸的技术将使废水处理成为一个能源产生过程（每年每人口当量产生4千瓦时的能量；千瓦时/人口当量/年：每年每人口当量的千瓦时数），而不是像现在这样成为一个大量能源消耗过程（每年每人口当量消耗24千瓦时的能量）。重要的是，污泥处理所需的游离亚硝酸可以作为废水处理的副产物产生。这种基于游离亚硝酸的技术在经济和环境方面具有吸引力，并且可以在任何废水处理厂轻松实施。它只涉及安装一个简单的污泥混合罐。本文介绍了基于游离亚硝酸的技术概念。
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