Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada.
Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada.
Environ Pollut. 2021 Sep 1;284:117118. doi: 10.1016/j.envpol.2021.117118. Epub 2021 Apr 11.
Enormous wastewater discharges have significantly impeded the sustainable development. As several economic belt has been formed in China, systematic analysis of multi-regional wastewater metabolic system is required for advancing wastewater mitigation effectively and efficiently. In this study, a distributive environmental input-output model (DEIO) is developed for the Yangtze River Economic Belt (YREB) to provide bases for supporting sustainable development from inter-regional and inter-sectoral perspectives. The discharges and flows of wastewater and related pollutants (i.e., chemical oxygen demand (COD) and ammonia nitrogen (AN)) among sectors and regions are analyzed to providing solid bases for wastewater management within the YREB. The results show that the industrial wastewater mitigation in YREB is desired urgently. The industrial wastewater discharges in Jiangsu and Zhejiang provinces are numerous, while Hunan and Yunnan provinces are more inclined to suffer from serious COD and AN pollution. In addition, the manufacture of food, tobacco, chemical materials, and pharmaceutical are the typical sectors with a large amount of direct wastewater discharge, and the tertiary industry is ranked at the first in indirect wastewater discharge. According to the analysis, the implementation of the "Supply-side Structure Reform" and the "Replace Subsidies with Rewards" policy can benefit the wastewater mitigation in the YREB.
大量的废水排放严重阻碍了可持续发展。随着中国形成了几个经济带，为了有效地推进废水减排，需要对多区域废水代谢系统进行系统分析。本研究开发了一个分布式环境投入产出模型（DEIO），用于长江经济带（YREB），从区域间和部门间的角度为支持可持续发展提供基础。分析了废水和相关污染物（即化学需氧量（COD）和氨氮（AN））在部门和地区之间的排放和流动情况，为 YREB 内的废水管理提供了坚实的基础。结果表明，YREB 迫切需要减少工业废水排放。江苏和浙江省的工业废水排放量较多，而湖南省和云南省则更容易受到严重的 COD 和 AN 污染。此外，食品、烟草、化工原料和制药等制造业是直接排放大量废水的典型部门，而第三产业在间接排放中排名第一。根据分析，实施“供给侧结构性改革”和“以奖代补”政策有利于 YREB 的废水减排。
