交替曝气生物滤池技术在处理住宅阳台排放洗涤废水工程中的应用
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摘要
针对太湖流域某复合污染型支浜阳台排放洗涤废水经雨水管道直接排河产生的污染问题,在雨水排放口上游设置溢流井,收集污水,提升至交替曝气生物滤池一体化设备,处理后排入河中,在工程稳定运行数月后,研究该技术处理效能、工艺优化方式和技术特色。综合评估表明:该处住宅阳台洗涤废水碳源浓度较低,但是即使C/N<1,交替曝气生物滤池仍然有较好的脱氮除磷效果,总氮与总磷去除率分别达到70%和50%以上。此外,1.52、1.90、2.28 m~3·(m~2·d)~(-1)3种水力负荷下氨氮容积负荷的变化均与氨氮去除率变化趋势一致;用normfit函数对3种水力负荷长期运行时氨氮出水浓度进行预测,结果表明平均出水浓度的区间估计均在0.79~2.18 mg·L~(-1)较低浓度之间,且置信度均接近1,说明工程可在较大水力负荷下运行。周期内水质连续监测的结果表明,切换曝气方向后出水水质下降的延续时间为30 min,相应时段出水应回流进行处理。
The altering sequence biological filter(ASBF) technology was used to treat washing wastewater from residential balcony which had seriously polluted a river in Taihu Lake basin. After the project being steady, the treatment efficiency, the process optimization and technical characteristics were studied. The result shows that the COD influent concentration was very low, even though C/N was less than 1, the TN and TP removal rate could still reach 70% and 50%,respectively. The change of NH_4~+-N volume loading had a similar tendency with the change of NH_4~+-N removal rate under the hydraulic loads of 1.52, 1.90, 2.28 m~3·(m~2·d)~(-1). The normfit function was used to predict NH_4~+-N effluent concentrations during the long-term operation. Under the three hydraulic loads,the prediction shows that the average long-term NH_4~+-N effluent concentrations all were between 0.79 mg·L~(-1) and 2.18 mg·L~(-1). Moreover, the confidence levels all were close to 1. It indicates that the project can operate under the maximum hydraulic load. According to the result of water quality in one cycle, the duration of water quality deterioration was 30 minutes after switching the aeration direction, and the effluent of corresponding period should be retreated.
The altering sequence biological filter(ASBF) technology was used to treat washing wastewater from residential balcony which had seriously polluted a river in Taihu Lake basin. After the project being steady, the treatment efficiency, the process optimization and technical characteristics were studied. The result shows that the COD influent concentration was very low, even though C/N was less than 1, the TN and TP removal rate could still reach 70% and 50%,respectively. The change of NH_4~+-N volume loading had a similar tendency with the change of NH_4~+-N removal rate under the hydraulic loads of 1.52, 1.90, 2.28 m~3·(m~2·d)~(-1). The normfit function was used to predict NH_4~+-N effluent concentrations during the long-term operation. Under the three hydraulic loads,the prediction shows that the average long-term NH_4~+-N effluent concentrations all were between 0.79 mg·L~(-1) and 2.18 mg·L~(-1). Moreover, the confidence levels all were close to 1. It indicates that the project can operate under the maximum hydraulic load. According to the result of water quality in one cycle, the duration of water quality deterioration was 30 minutes after switching the aeration direction, and the effluent of corresponding period should be retreated.
引文
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[15] WANG Q B, CHEN Q W. Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic-oxic process without internal recycle treating low strength wastewater[J]. Journal of Environmental Sciences,2016,39:175-183. DOI:10.1016/j.jes.2015.10.012.
[16]王亚宜,王淑莹,彭永臻.反硝化除磷的生物化学代谢模型[J].中国给水排水,2006,22(6):4-7.
[17]吴月华,盛德洋,张锡辉,等.饮用水处理中不同滤料除氨氮效果及需氧量研究[J].给水排水,2011,47(6):22-26.
[18]刘晃,管崇武,倪琦,等.生物膜法SBR(BSBR)在循环养殖水处理中影响因素分析[J].南方水产,2008(4):55-59.
[19]李思敏,刘强,秦卫峰,等.上向流曝气生物滤池去除氨氮效果及影响因素分析[J].中国给水排水,2009,25(3):102-104.
[20]王立立,刘焕彬,胡勇有,等.曝气生物滤池处理低浓度生活污水的研究[J].工业水处理,2003,23(3):29-32.
[21]徐春来.焦化废水A2/O2工艺投加优势菌脱氮试验研究[D].太原:太原理工大学,2008.
[2]金相灿.中国湖泊环境[M].北京:海洋出版社,1995.
[3] SYLWIA M, MAGDALENA J, PIOTR B, et al. A system coupling hybrid biological method with UV/O3 oxidation and membrane separation for treatment and reuse of industrial laundry wastewater[J]. Environmental Science and Pollution Research International,2016,23(19):19145-19155. DOI:10.1007/s11356-016-7111-5.
[4]韩诚.交替曝气生物滤池工艺处理生活污水实验室研究[D].南京:南京大学,2016.
[5]张建华,彭永臻,张淼,等.同步硝化反硝化SBBR处理低C/N比生活污水的启动与稳定运行[J].化工学报,2016,67(11):4817-4824.
[6]师祥洪,王志强.密封消解法测定高盐废水COD时的最佳实验条件选择[J].环境工程,2003,21(5):51-54.
[7] HENZE M. Capabilities of biological nitrogen removal processes from wastewater[J]. Water Science and Technology,1991,23:669-679.DOI:10.2166/wst.1991.0517.
[8] BEUN J J, PALETTA F, VANLOOSDRECHT M C M, et al. Stoichiometry and kinetics of poly-b-hydroxybutyrate metabolism in aerobic slow growing activated sludge cultures[J]. Biotechnology and Bioengineering,2000,67(4):379-389.
[9] YU J, SI Y T. Metabolic carbon fluxes and biosynthesis of polyhydroxyalkanoates in Ralstoniaeutropha on short chain fatty acids[J].Biotechnology Progress,2004,20(4):1015-1024. DOI:10.1021/bp034380e.
[10] BERNAT K, BARYLA I W, DOBRZYNSKA A. Denitrification with endogenous carbon source at low C/N and its effect on P(3HB)accumulation[J]. Bioresource Technology,2007,99(7):2410-2418. DOI:10.1016/j.biortech.2007.05.008.
[11] BEUN J J, DIRCKS K, VANLOOSDRECHT M C M, et al. Poly-β-hydroxybutyrate metabolism in dynamically fed mixed microbial cultures[J]. Water Research,2002,36(5):1167-1180.
[12] VALENTINO F, KARABEGOVIC L, MAJONE M, et al. Polyhydroxyalkanoate(PHA)storage within a mixed-culture biomass with simultaneous growth as a function of accumulation substrate nitrogen and phosphorus levels[J]. Water Research,2015,77:49-63.DOI:10.1016/j.watres.2015.03.016.
[13] BENGTSSON S, KARLSSON A, ALEXANDERSSON T, et al. A process for polyhydroxyalkanoate(PHA)production from municipal wastewater treatment with biological carbon and nitrogen removal demonstrated at pilot-scale[J]. New Biotechnology,2017,35:42-53.DOI:10.1016/j.nbt.2016.11.005.
[14]周永刚.反硝化生物滤池在污水厂升级改造中的应用[J].中国给水排水,2014,30(24):49-52.
[15] WANG Q B, CHEN Q W. Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic-oxic process without internal recycle treating low strength wastewater[J]. Journal of Environmental Sciences,2016,39:175-183. DOI:10.1016/j.jes.2015.10.012.
[16]王亚宜,王淑莹,彭永臻.反硝化除磷的生物化学代谢模型[J].中国给水排水,2006,22(6):4-7.
[17]吴月华,盛德洋,张锡辉,等.饮用水处理中不同滤料除氨氮效果及需氧量研究[J].给水排水,2011,47(6):22-26.
[18]刘晃,管崇武,倪琦,等.生物膜法SBR(BSBR)在循环养殖水处理中影响因素分析[J].南方水产,2008(4):55-59.
[19]李思敏,刘强,秦卫峰,等.上向流曝气生物滤池去除氨氮效果及影响因素分析[J].中国给水排水,2009,25(3):102-104.
[20]王立立,刘焕彬,胡勇有,等.曝气生物滤池处理低浓度生活污水的研究[J].工业水处理,2003,23(3):29-32.
[21]徐春来.焦化废水A2/O2工艺投加优势菌脱氮试验研究[D].太原:太原理工大学,2008.