张琼华 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

Environment International

Key Words:

中文关键字：污水处理、区域 污水处理、排放标准、能耗、污水再生利用，英文关键字：Wastewater treatment plants (WWTPs);Regional sewag

Abstract:

The study reported and analyzed the current state ofwastewater treatment plants (WWTPs) in urban China from the perspective of treatment technologies, pollutant removals, operating load and effluent discharge standards.By the end of 2013, 3508WWTPs have been built in 31 provinces and cities in China with a total treatment capacity of 1.48 × 108m3/d. The uneven population distribution between China's east andwest regions has resulted in notably different economic development outcomes. The technologiesmostly used inWWTPs are AAO and oxidation ditch, which account for over 50% of the existingWWTPs. According to statistics, the efficiencies of COD and NH3–N removal are good in 656WWTPs in 70 cities. The overall average COD removal is over 88% with few regional differences. The average removal efficiency of NH3–N is up to 80%. Large differences exist between the operating loads applied in different WWTPs. The average operating loading rate is approximately 83%, and 52% of WWTPs operate at loadings of b80%, treating up to 40% of the wastewater generated. The implementation of discharge standards has been low. Approximately 28% ofWWTPs that achieved the Grade I-A Discharge Standard of Pollutants forMunicipalWastewater Treatment Plant (GB 18918–2002)were constructed after 2010. The sludge treatment and recycling rates are only 25%, and approximately 15% of wastewater is inefficiently treated. Approximately 60% ofWWTPs have capacities of 1 × 104m3/d–5×104m3/d. Relatively high energy consumption is required for small-scale processing, and the utilization rate of recycled wastewater is low. The challenges of WWTPs are discussed with the aim of developing rational criteria and appropriate technologies for water recycling. Suggestions regarding potential technical and administrative measures are provided.

Note:

张琼华

Co-author:

敖东,杨温娜,吴友豪,郭文珊,马乌里,王倩

First Author:

王晓昌,yangshengjiong,金鹏康,Zhang Qionghua

Indexed by:

Journal paper

Volume:

卷：92-93

Issue:

期：

Page Number:

页：11-22

Translation or Not:

no

Date of Publication:

2016-04-01