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根据昆明市第一污水处理厂深度处理微絮凝-D型滤池工艺的运行数据,评价了工艺出水水质及总磷(TP)去除效果,同时分析了混凝剂投加量及药剂费用。结果表明,微絮凝-D型滤池工艺出水TP平均浓度为0.15 mg/L,最优水平值为0.05 mg/L,95%保证值为0.37 mg/L,TP平均去除率为63.6%。出水悬浮固体(SS)浓度95%保证值为10 mg/L。混凝剂聚合氯化铝(PAC)的投加量在1.5~4 mg Al2O3/L范围波动,去除单位TP的PAC投加量平均值为16.7 mg Al2O3/mg-P,投加比为2~8 mol-Al/mol-P。当投加比超过5时,出水TP浓度可达到0.3 mg/L以下。吨水PAC成本平均值为0.017元/t。 相似文献
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昆明市污水处理厂运行综合评价 总被引:1,自引:0,他引:1
应用技术性能、经济成本、环境影响(温室效应和富营养化效应)指标,对采用氧化沟、ICEAS、3AMBR和A2O4种不同工艺的昆明市7座污水处理厂运行进行综合评价。各污水处理厂对BOD、SS和NH+4-N都具有较高的去除率,在91%以上;COD去除率在86%以上;TP去除率在86%~96%之间;TN去除率在59%~76%之间。污水处理厂的运行经济成本同工艺类型和进出水水质密切相关,经济成本主要来源于电耗;采用3AMBR工艺的污水处理厂经济成本远高于其他污水处理厂。温室气体主要来源于电耗和出水一氧化二氮释放,其中3AMBR工艺具有最大的温室气体释放量。出水污染物中对富营养化效应贡献最大的为硝酸盐,不同类型工艺出水造成的富营养化效应差别不大。结合污染物去除性能和综合成本进行分析,ICEAS工艺具有最好的综合性能,而3AMBR工艺综合性能相对较差。 相似文献
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污水生物脱氮硝化阶段是温室气体一氧化二氮(N2O)的重要释放源。采用连续流反应器在2种进水氨氮(NH4-N,低氮反应器60 mg/L和高氮反应器180 mg/L)浓度条件下驯化硝化菌,并研究了不同初始NH4-N浓度和不同初始亚硝酸盐(NO2-N)浓度条件下所驯化硝化菌释放N2O的特征。结果表明在反应器运行过程中2个反应器释放N2O较少,均小于去除NH4-N浓度的0.01%;N2O的释放均随着初始NH4-N浓度或初始NO2-N浓度的升高而增加;不同初始NH4-N浓度条件下,低氮反应器驯化硝化菌的N2O释放率在0.51%~1.40%之间,高氮反应器驯化硝化菌在0.29%~1.27%之间;不同初始NO2-N浓度条件下,低氮反应器驯化硝化菌的N2O释放率在1.38%~3.78%之间,高氮反应器驯化硝化菌在1.16-5.81%之间。 相似文献
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昆明市分流制排水区域污水厂进水水质特征的统计学分析 总被引:1,自引:0,他引:1
应用多元统计方法系统分析了昆明市某分流制排水区域污水处理厂进水水质特征.结果表明,95%保证率时,该污水处理厂进水BOD5、COD、SS、TN、NH3-N和TP质量负荷分别为11 100、30 000、39 400、2 000、1 600和390 kg/d.进水水质指标中除了SS和NH3-N之间无相关性外,其余各指标间显著相关(α<0.01).进水SS分别与BOD5、TP、COD有较强的相关性,其Pearson相关系数分别为0.845、0.786和0.915,进水BOD5分别与TP、COD亦有较强的相关性,其Pearson相关系数分别为0.808和0.918.进水BOD5/TN值>4和BOD5/TP值>20的累积概率分别为35%和94%,表明该污水处理厂进水有机物浓度不能满足微生物反硝化的需求,但可满足生物除磷对有机物和磷的理论需求量. 相似文献
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污水生物脱氮硝化阶段是温室气体一氧化二氮(N2O)的重要释放源。采用连续流反应器在2种进水氨氮(NH4-N,低氮反应器60 mg/L和高氮反应器180 mg/L)浓度条件下驯化硝化菌,并研究了不同初始NH4-N浓度和不同初始亚硝酸盐(NO2-N)浓度条件下所驯化硝化菌释放N2O的特征。结果表明在反应器运行过程中2个反应器释放N2O较少,均小于去除NH4-N浓度的0.01%;N2O的释放均随着初始NH4-N浓度或初始NO2-N浓度的升高而增加;不同初始NH4-N浓度条件下,低氮反应器驯化硝化菌的N2O释放率在0.51%~1.40%之间,高氮反应器驯化硝化菌在0.29%~1.27%之间;不同初始NO2-N浓度条件下,低氮反应器驯化硝化菌的N2O释放率在1.38%~3.78%之间,高氮反应器驯化硝化菌在1.16-5.81%之间。 相似文献
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Yanfei Wang Xiaona Zheng Guangxue Wu Yuntao Guan 《Frontiers of Environmental Science & Engineering》2023,17(6):74
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Nutrient removal from domestic strength synthetic wastewater by an alternating pumped flow sequencing batch biofilm reactor (APFSBBR) was investigated in this laboratory study. The APFSBBR comprised two reactor tanks (Reactors 1 and 2) with two identical biofilm modules of vertical tubular plastic media with a high specific surface area, one in each tank. The APFSBBR was operated in cycles of four phases: fill, anaerobic, aerobic, and draw. During the fill phase, Reactor 1 was half-filled with domestic strength synthetic wastewater. During the subsequent anaerobic phase, most of the phosphorus release took place from the submerged biofilm in this reactor. In the aerobic phase, the wastewater was circulated by pumps between Reactors 1 and 2, resulting in denitrification at the start of the aerobic phase due to low oxygen concentrations, followed by nitrification and luxury uptake of phosphorus when oxygen concentrations increased. During the draw phase, Reactor 2 was half-emptied of the treated water. At the chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) loading rates on the total biofilm area of 3.20 g COD, 0.33 g TN, and 0.06 g TP m(-2) d(-1), the removal efficiencies were 97, 85, and 92% for COD, TN, and TP, respectively. 相似文献
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The detection of acyl homoserine lactones(AHLs) in activated sludge is essential for clarifying their function in wastewater treatment processes. An LC–MS/MS method was developed for the detection of AHLs in both the aqueous and solid phases of activated sludge. In addition, the effects of proteases and extracellular polymeric substances(EPS) on the detection of AHLs were evaluated by adding protease inhibitors and extracting EPS,respectively. Recoveries of each AHL were improved by adding 50 μL of protease inhibitor,and recoveries were also improved from 0 to 56.9% to 24.2%–105.8% by EPS extraction.Applying the developed method to determine the type and concentration of AHLs showed that C4-HSL, C_6-HSL, C_8-HSL and 3-oxo-C_8-HSL were widely detected in a suspended activated sludge system. The dominant AHL was C_8-HSL, with a highest concentration of304.3 ng/L. C_4-HSL was mainly distributed in the aqueous phase, whereas C_6-HSL, C_8-HSL and 3-oxo-C_8-HSL were preferentially distributed in the sludge phase. 相似文献
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Comparative studies between high-frequency and lowfrequency acoustic agglomeration were carried out to investigate the frequency influence on agglomeration efficiency. 相似文献