城镇污水收集处理系统提质增效过程中节能减排可行性分析
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摘要
污水处理厂电费约占日常运行费的40%,近年来,许多地方大力推进城镇污水处理厂提标改造,进一步增加了电耗,提高日常运行费用。分析了近10年城镇污水处理厂的运行数据,基于产污系数法测算了城镇污水处理厂提标到地表水准Ⅳ类标准和改善污水收集管网两种情形下削减BOD及新增能耗。结果显示,若将全国城镇污水处理厂全部提标到准Ⅳ类,可新增BOD削减7.75万t/年,同时新增能耗202 100万kW·h/年;若将全国污水管网进行修复改善,可新增BOD削减量306万t/年,同时新增能耗245 170万kW·h/年,通过提高进水浓度新增的BOD削减量,其单位能耗仅为目前单位BOD消减所需能耗的约1/2,节能效果显著。
Electricity cost about 40% of daily operatingexpenses of sewage Treatment Plant. In recent years, upgrading and reconstruction of urban wastewater treatment plantsare mentioned a lot, that further increases the power consumption. This paper analyzes the wastewater treatment plant performance data of the last 10 years, to compare the BOD degradation and power consumption under two operating mode, one is upgrading and reconstruction of urban wastewater treatment plants, another is improve sewerage network. The result shows that with the first method(similar to class Ⅳ standard)BOD degradation and power consumption will increase 77 500 kg/a, and 2.02 billion kW·h/a separately;With the second method BOD degradation and power consumption will increase 3.06 million kg/a and 2.45 billion kW·h/a separately, which is much more efficient. As a result, improving the sewerage network should be the first choice to control the water pollution by domestic sewage.
Electricity cost about 40% of daily operatingexpenses of sewage Treatment Plant. In recent years, upgrading and reconstruction of urban wastewater treatment plantsare mentioned a lot, that further increases the power consumption. This paper analyzes the wastewater treatment plant performance data of the last 10 years, to compare the BOD degradation and power consumption under two operating mode, one is upgrading and reconstruction of urban wastewater treatment plants, another is improve sewerage network. The result shows that with the first method(similar to class Ⅳ standard)BOD degradation and power consumption will increase 77 500 kg/a, and 2.02 billion kW·h/a separately;With the second method BOD degradation and power consumption will increase 3.06 million kg/a and 2.45 billion kW·h/a separately, which is much more efficient. As a result, improving the sewerage network should be the first choice to control the water pollution by domestic sewage.
引文
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[2] 杨凌波,曾思育,鞠宇平.我国城市污水处理厂能耗规律的统计分析与定量识别[J].给水排水,2008.34(10):42-45.
[3] 杨敏,李亚明,魏源送.大型再生水厂不同污水处理工艺的能耗比较与节能途径[J].环境科学,2015,36(6):2203-2209.
[4] 郑国辉,罗建中,李季芳.佛山市龙江镇污水处理厂节能改造[J].中国给水排水,2017,33(4):75-78.
[5] 任福民,毛联华,阜葳.中国城镇污水处理厂运行能耗影响因素研究[J].给水排水,2015,41(1):42-47.
[6] 将勇,阜葳,毛联华.城市污水处理厂运行能耗影响因素分析[J].给水排水,2014,38(1):33-37.
[7] 马宁,汪浩,刘操.污水厂提标改造中AAO工艺研究与应用趋势[J].中国给水排水,2016,32(20):29-33.
[8] 谭雪,石磊,陈卓琨,等.基于污水处理厂运营成本的污水处理费制度分析[J].中国环境科学,2015,35(12):3833-3840.
[9] 谭雪,石磊,马中,等.基于全国227个样本的城镇污水处理厂治理全成本分析[J].给水排水,2015,41(5):30-34.
[10] 住房城乡建设部.2016年中国城市建设统计年鉴[M].北京:中国计划出版社,2017.
[11] 国家发展改革委住房城乡建设部.关于印发《“十三五”全国城镇污水处理及再生利用设施建设规划》的通知.[EB/OL].2016-12-31.http:www.ndrc.gov.cn/zcfb/zcfbghwb/201701/t20170122_8 3 6133.html.
[12] 陈玮,徐慧纬,高伟,等.基于产污系数法测算城镇污水处理系统的主要污染物消减效能提升潜力[J].给水排水,2018,44(7):24-29.