期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 40, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jwpe.2020.101881
关键词
Wastewater treatment; Organics transformation; Organics-enriched sludge; Anaerobic fermentation for VFAs production; Source recovery
资金
- National Natural Science Foundation of China [51978313]
- Suzhou Agricultural Science and Technology Innovation Project [SNG2018049]
- Natural Science Foundation of Jiangsu Higher Education [19KJB610024]
- Suzhou City Science and Technology Project [SS202014]
By introducing a strategy of directly recovering organics for the production of VFAs in wastewater treatment, overall bioavailability and production rates of VFAs were greatly improved. Economic evaluations showed that this approach was promising in making wastewater treatment plants profitable, with a significant increase in the transfer of wastewater organics into VFAs compared to conventional processes.
A strategy of directly recovering organics for the production of volatile fatty acids (VFAs) was introduced to make wastewater treatment profitable. A sludge adsorption section was proposed to add before the conventional wastewater process for adsorbing the organics in wastewater by the excess activated sludge which was produced during biological wastewater treatment and returned from the secondary settling tank. Then, the excess activated sludge combining wastewater organics, called organics-enriched sludge, was anaerobically fermented for the production of high value-added VFAs. Results indicated about 70 % of wastewater organics could be source recovered within 30 min. Most of the organics in wastewater could avoid being lost via carbon dioxide or synthesized into bacterial organisms, therefore, the total amount and overall bioavailability of the organics recovered from wastewater were greatly improved. Pilot-scale tests indicated VFAs production from wastewater organics was enhanced by 62.2 %. Mass balance analysis indicated 46.8 % of wastewater organics could be finally transferred into VFAs, only 12 % in conventional processes. Economic evaluations indicated source recovering wastewater organics for VFAs production was a promising alternative to make wastewater treatment plants (WWTPs) profitable. Finally, an idealized organics transformation route for wastewater treatment was proposed based on this concept to make wastewater treatment profitable.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据