负熵
废水
资源回收
环境科学
污水处理
熵产生
流出物
厌氧消化
废物管理
环境工程
生化工程
甲烷
生态学
计算机科学
热力学
工程类
生物
独立成分分析
机器学习
物理
作者
Xiaodi Hao,Daoqi Wu,Ji Li,Ranbin Liu,Mark C.M. van Loosdrecht
出处
期刊:Water Research
[Elsevier]
日期:2022-06-01
卷期号:218: 118516-118516
被引量:22
标识
DOI:10.1016/j.watres.2022.118516
摘要
Entropy is a concept defined by the second law of thermodynamics. Applying this concept to the world we live in, entropy production must be minimized and negentropy (negative entropy production) should be accelerated, in order to produce a healthy and stable ecological system. The present wastewater treatment, however, contributes to entropy production. This means that conventional wastewater treatment, without recovery of resource and energy, will gradually but inevitably contribute to a deteriorating ecological balance. When the self-cleaning ability of the natural ecological system is limited, the need to develop sustainable wastewater treatment in order to delay entropy production and accelerate negentropy becomes urgent. Resource and energy recovery from wastewater should be the first priority, as they can contribute significantly towards minimizing entropy production and accelerating negentropy. Sustainable wastewater treatment must focus on recovering recyclable high value-added organic chemicals from wastewater and/or excess sludge to minimize entropy production caused by methane (CH4, once combusted, is converted into CO2 - an even higher substance in entropy) via anaerobic digestion. Instead of CH4, thermal energy present in the effluent can be utilized for heating/cooling buildings and also for drying excess sludge towards incineration to recover more energy. Overall, this can lead to a carbon-neutral operation and even creating a "carbon sink" could be possible for wastewater treatment.
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