摘要
【目的】为兼顾生物质碳源应用于污水生物脱氮工程中的处理效果及经济效益,探究其对污水处理过程中活性污泥反硝化作用的影响,并进行经济效益评估。【方法】文章通过对生物质碳源采用不同复合配比的方式与传统乙酸钠碳源进行脱氮效果对比分析。【结果】生物质碳源、生物质∶乙酸钠质量比为2∶1的复合碳源、生物质∶乙酸钠质量比1∶1的复合碳源、生物质∶乙酸钠质量比1∶2的复合碳源、生物质∶乙酸钠质量比为1∶3的复合碳源以及乙酸钠碳源的反硝化脱氮效果依次提升,但当复合碳源中生物质和乙酸钠的质量比为1∶2时,综合效果最佳,其硝态氮(NO_(3)^(-)-N)和亚硝态氮(NO_(2)^(-)-N)的去除率可达82.9%和90.8%,反硝化速率最高为6.5 mg NO_(3)^(-)-N/(g VSS·h)和9.5 mg NO_(2)^(-)-N/(g VSS·h)。通过应用于青岛市某城镇污水处理厂的生产性试验进一步验证,其NO_(3)^(-)-N的去除率高达73.9%,可有效保障硝态氮去除效果的稳定性,保障出水总氮指标的稳定性,且出水水质优于《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A水质排放标准。相较于传统的乙酸钠碳源,其成本可节约12.9%。【结论】文章将为城镇污水处理厂的生物反硝化脱氮过程提供一种新颖的生物质碳源利用方式,实现了生物质废弃物资源循环利用,为污水处理厂向绿色低碳标杆厂发展提供了技术经验,具有广泛的应用前景及推广价值。
[Objective]To balance the treatment efficiency and economic benefits of biomass-based carbon sources in biological nitrogen removal engineering for wastewater,this paper compares the denitrification performance of various composite ratios of biomass carbon sources with traditional sodium acetate.[Methods]The effects of different biomass-sodium acetate composite carbon source ratios on activated sludge denitrification were investigated,and an economic benefit assessment was conducted.[Results]The denitrification performance increased in the following order∶biomass carbon source<composite carbon source with biomass∶sodium acetate(mass ratio,2∶1)<1∶1<1∶2<1∶3<sodium acetate carbon source.However,the composite carbon source with a biomass∶sodium acetate mass ratio of 1∶2 exhibited the optimal comprehensive performance,achieving nitrate-nitrogen(NO_(3)^(-)-N)and nitrite-nitrogen(NO_(2)^(-)-N)removal rates of 82.9%and 90.8%,respectively,with maximum denitrification rates of 6.5 mg NO_(3)^(-)-N/(g VSS·h)and 9.5 mg NO_(2)^(-)-N/(g VSS·h).Pilot-scale application at a municipal wastewater treatment plant in Qingdao further verified these findings,with a NO_(3)^(-)-N removal rate reaching 73.9%.This ensured stable nitrate removal and effluent total nitrogen concentrations,with effluent quality surpassing the first class A discharge standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918—2002).Compared with conventional sodium acetate,the composite carbon source reduced costs by 12.9%.[Conclusion]This paper provides a novel approach for applying biomass carbon sources in the biological denitrification process of municipal wastewater treatment plants,realizing resource recycling of biomass waste.It offers technical experience for developing green,low-carbon benchmark plants and demonstrates broad application prospects and promotion value.
作者
王黎佳
孙贤鹏
张国旺
石宁
刘旭阳
刘晓军
包苏俊
WANG Lijia;SUN Xianpeng;ZHANG Guowang;SHI Ning;LIU Xuyang;LIU Xiaojun;BAO Sujun(Qingdao Loushanhe Water Co.,Ltd.,Qingdao 266043,China;Qingdao Drainage Operation Service Center,Qingdao 266000,China;Qingdao Capital Ruihai Water Co.,Ltd.,Qingdao 266031,China;Qingdao Baifa Seawater Desalination Co.,Ltd.,Qingdao 266041,China;Shanghai Municipal Engineering Design Instiute<Group>Co.,Ltd.,Shanghai 200092,China)
出处
《净水技术》
2025年第8期93-100,共8页
Water Purification Technology
关键词
生物质碳源
复合配比
反硝化脱氮
生产性试验
经济效益
biomass carbon source
composite ratio
nitragen removal by denitrification and denitrification
productive test
economic benefit
