CAST工艺污水处理厂CO_2排放特性分析
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摘要
全球碳排放形势日益严峻,二氧化碳(CO_2)是导致全球变暖的主要温室气体,而污水处理厂的碳排放占了相当一部分比例。由于国内的CO_2监测体系尚不完备,研究利用便携式CO_2浓度测量仪对镇江市征润洲污水处理厂进行了为期1年的监测。监测结果表明:在空间分布上,各研究区域总体呈现出工艺单元测量点CO_2浓度高于厂内其他区域的趋势,且生化池的CO_2浓度一般要高于其他构筑物;在时间分布上,研究区域均呈现出不同程度的季节性。此外,污水处理厂内局部CO_2浓度明显受到进水水质、气温、风速的影响。
The global carbon emissions situation is becoming more and more serious. Carbon dioxide(CO_2) is the major greenhouse gas that causes global warming. And the carbon emissions of sewage treatment plants account for a considerable part. Due to the incomplete CO_2 monitoring system in China, a one-year monitoring of Zhengrunzhou Sewage Treatment Plant in Zhenjiang City was conducted in this study using a portable CO_2 concentration measuring instrument. Monitoring results indicate that the study area generally showed a trend that the CO_2 concentration of the process unit measurement point was higher than other areas in the plant in terms of spatial distribution. And the CO_2 concentration of the biochemical pool was generally higher than other structures. In the time distribution, the study area showed varying degrees of seasonality.In addition, the local CO_2 concentration in the sewage treatment plant is obviously affected by the influent water quality,temperature and wind speed.
The global carbon emissions situation is becoming more and more serious. Carbon dioxide(CO_2) is the major greenhouse gas that causes global warming. And the carbon emissions of sewage treatment plants account for a considerable part. Due to the incomplete CO_2 monitoring system in China, a one-year monitoring of Zhengrunzhou Sewage Treatment Plant in Zhenjiang City was conducted in this study using a portable CO_2 concentration measuring instrument. Monitoring results indicate that the study area generally showed a trend that the CO_2 concentration of the process unit measurement point was higher than other areas in the plant in terms of spatial distribution. And the CO_2 concentration of the biochemical pool was generally higher than other structures. In the time distribution, the study area showed varying degrees of seasonality.In addition, the local CO_2 concentration in the sewage treatment plant is obviously affected by the influent water quality,temperature and wind speed.
引文
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[2]BAO Z, SUN S, SUN D. Characteristics of direct CO2 emissions in four full-scale wastewater treatment plants[J]. Desalination and water treatment, 2015, 54(4/5):1 070-1 079.
[3]BAO Z, SUN S, SUN D. Assessment of greenhouse gas emission from A/O and SBR wastewater treatment plants in Beijing, China[J].International biodeterioration&biodegradation, 2016, 108(3):108-114.
[4]DAELMAN MRJ, VAN VOORTHUIZEN EM, VAN DONGEN LGJM. Methane and nitrous oxide emissions from municipal wastewater treatment–results from a long-term study[J]. Water science and technology, 2013, 67(10):2 350.
[5]DELRE A, M NSTER J, SCHEUTZ C. Greenhouse gas emission quantification from wastewater treatment plants, using a tracer gas dispersion method[J]. Science of the total environment, 2017,605/606(12):258-268.
[6]高华建,阴曙光,马祖军.重庆市城镇化进程中家庭间接CO2排放的测算及分解分析[J].环境科技, 2017, 30(3):1-6.
[7]MASUDA S, SANO I, HOJO T. The Comparison of greenhouse gas emissions in sewage treatment plants with different treatment processes[J]. Chemosphere, 2018, 193:581-590.
[8]OSHITA K, OKUMURA T, TAKAOKA M. Methane and nitrous oxide emissions following anaerobic digestion of sludge in apanese sewage treatment facilities[J]. Bioresource technology, 2014,171(2):175-181.
[9]胡大龙,王罗春,周振.污水处理过程中的温室气体排放现状及展望[J].环境科学与技术, 2014, 37(3):108-112.
[10]李薇,汤烨,徐毅.城市污水处理行业污染物减排与CO2协同控制研究[J].中国环境科学, 2014, 34(3):681-687.
[11]刘琴.南京江宁开发区污水厂臭气处理工程建设的几点经验[J].环境科技, 2012, 25(1):53-55.
[12]闫旭,邱德志,郭东丽.中国城镇污水处理厂温室气体排放时空分布特征[J].环境科学, 2018, 39(3):1 256-1 263.
[13]翟萌,邵越,徐福军.西安污水处理厂温室气体排放及减排对策研究[J].环境工程, 2016, 34(2):23-26.
[14]王娟,张洋,叶敏强,等.化学需氧量与氨氮比值对污水降解能力的影响研究[J].环境科技, 2018, 31(2):29-32.
[15]郭静波,田宇,张兰河.城市污水处理厂温室气体的排放及减排对策[J].化工进展, 2012, 31(7):1 604-1 609,1 624.
[16]严俊泉,焦建文,陆晓岚. CAST工艺运行优化和控制研究[J].中国给水排水, 2010, 26(9):46-49.
[17]董宝刚.某乡镇污水处理厂CAST工艺运行的优化[J].环境科技, 2018, 31(5):41-44.