摘要低浓度生活污水的处理是水处理的难点之一，其有机负荷低；污水厂长期在

摘要
低浓度生活污水的处理是水处理的难点之一，其有机负荷低；污水厂长期在这种环境下运营，会影响活性污泥活性，降低脱氮除磷效率。本文利用SBR工艺处理邵伯低浓度生活污水进行了试验研究，根据研究成果，选用了合适的深度处理工艺，完成了邵伯污水站“提标改造”的设计；得出结论如下：
（1）采用正交实验法，研究得到SBR试验装置处理邵伯低浓度生活污水的最佳工况时间：进水搅拌时间 30 min，曝气时间 2 h，停曝搅拌时间 60 min，沉淀时间 60 min，滗水及闲置时间2h；在最佳工况下运行，出水CODcr浓度、NH3-N浓度均能达到《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准，出水TP浓度仅能达到《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级B标准。通过污泥浓度的研究得到：污水CODcr、NH3-N、TP的去除率随着污泥浓度的升高而增大；当污泥浓度介于2000～2500 mg/L时，系统NH3-N去除率较高；当污泥浓度＞2500 mg/L时，NH3-N去除率有所下降；故试验研究采用的污泥浓度为2500mg/L。
（2）研究进水COD负荷对SBR工艺脱氮除磷的影响，随着进水COD浓度的上升，COD、NH3-N、TN、TP去除率随之提高；随着进水COD浓度的上升，NH3-N去除率从85%增大到88%，推出进水有机负荷不是影响NH3-N去除的主要因素；TN、TP去除率均在50%之内，推出SBR反应器内反硝化细菌、聚磷菌同时在争夺有机营养。外加碳源强化生物除磷的研究，当试验研究在正常气温条件下有利于SBR系统的生物处理，葡萄糖投加量达到60 mg/L时，出水指标能达到《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准；当试验研究在冬季低温（实验室气温低于5℃）进行时，随着葡萄糖投加量的增加，出水COD指标随之上升，当葡萄糖投加量＞110 mg/L时，出水COD超出《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准的限值（≤50 mg/L），此时出水TP依然不能达标。
（3）提高除磷效率的研究：向SBR反应器曝气阶段初期投加PAC化学药剂，发现PAC的投加量增加对系统除氮有一定的抑制作用，当PAC药剂投加量达到80mg/L时，出水各指标才能达到《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准；在生物处理出水直接投加化学药剂，发现PAC投加量18 mg/L时，出水TP浓度＜0.5 mg/L，出水指标均能达到《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准。
关键字： SBR工艺；脱氮除磷；外加碳源；化学除磷；提标改造

結果 (英文) 1:

SummaryTreatment of low concentration domestic sewage water treatment is one of the difficulties, the organic load is low; sewage treatment plants operating in this environment for a long time, will affect the activity of activated sludge and reduce the efficiency of nitrogen and phosphorus. Shaobo low concentration domestic sewage treatment using SBR technology tests, according to the study results, choose a suitable process for advanced treatment, completed the Shaobo sewage station "transformation" design concluded as follows:(1) used orthogonal experiment method, research get SBR test device processing Shaobo low concentration life sewage of best workers condition time: water mixing time 30 min, exposure gas time 2 h, stopped exposure mixing time 60 min, precipitation time 60 min, decanter water and the idle time 2H; in best workers condition Xia run, water CODcr concentration, and NH3-N concentration are can reached town sewage processing factory pollutants emissions standard (GB18918-2002) in the of a level a, standard, Effluent TP concentration can only meet the discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) in the level b standard. Through the research of sludge concentration: sewage CODcr, NH3-N, TP removal rate increase with MLSs; when the sludge at a concentration range 2000~2500 mg/l, high removal rate of system NH3-N; when the sludge concentration >2500 mg/l, and NH3-N removal rate of decline experiment research on sludge concentration is 2500mg/L.(2) research water COD load on SBR process off nitrogen except p of effect, with water COD concentration of rose, COD, and NH3-N, and TN, and TP removal rate with of improve; with water COD concentration of rose, NH3-N removal rate from 85% increases to 88%, launched water organic load not effect NH3-N removal of main factors; TN, and TP removal rate are in 50% within, launched SBR reactor within anti-nitrification bacteria, and poly p bacteria while in compete for organic nutrition. Plus carbon source strengthened biological except p of research, dang test research in normal temperatures conditions Xia conducive to SBR system of biological processing, glucose voted added volume reached 60 mg/L Shi, water index can reached town sewage processing factory pollutants emissions standard (GB18918-2002) in the of a level a, standard; Dang test research in winter low temperature (laboratory temperatures below 5 ℃) for Shi, with glucose voted added volume of increased, water COD index with of rose, dang glucose voted added volume >110 mg/ L effluent COD exceeded discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) in the limit of a-level standards (≤ 50 mg/l), when the effluent TP cannot reach.(3) improve except p efficiency of research: to SBR reactor exposure gas stage early voted added PAC chemical pharmacy, found PAC of voted added volume increased on system except nitrogen has must of inhibition, dang PAC pharmacy voted added volume reached 80mg/L Shi, water the index to reached town sewage processing factory pollutants emissions standard (GB18918-2002) in the of a level a, standard; in biological processing water directly voted added chemical pharmacy, found PAC voted added volume 18 mg/L Shi, Effluent TP concentrations of <0.5 mg/l effluent targets can meet the discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) a-level standard.Keywords: SBR process; removal of nitrogen and phosphorus; external carbon source; chemical removal of phosphorus transformation

結果 (英文) 3:

The treatment of low concentration domestic sewage is one of the difficult problems in water treatment, which has low organic load, and the wastewater treatment plant is operated under this environment for a long time, which will affect the activity of activated sludge and reduce the efficiency of nitrogen and phosphorus removal. In this paper, the SBR technology is used to deal with Shao Bodi's concentration. According to the research results, a suitable depth treatment process is selected. The design of the "standard" design of the waste water station is completed. The optimal operating conditions of the SBR test apparatus are: (1),Aeration stirring time 60 min, sedimentation time for 60 minutes, decanting and idle time 2H; run in the best condition, CODCr, NH3-N can achieve "urban sewage treatment plant pollutant discharge standard" (GB18918-2002) in the level of a standard, concentration of TP can only achieve "urban sewage treatment plant pollutant discharge standard" (GB18918-2002) in a B standard. The removal rate of NH3-N, TP and CODcr increased with the increase of sludge concentration, and the removal rate of NH3-N was higher when the concentration of sludge was from 2000 to 2500 mg/L;When the sludge concentration was over 2500 NH3-N, the removal rate of mg/L was decreased, and the concentration of sludge in the experiment was 2500mg/L.
(2) the effect of influent COD loading on SBR process was studied. The removal rate of COD, TN, NH3-N and TP increased with the increase of COD concentration. The removal rate of NH3-N increased from 85% to 88% with the increase of influent COD concentration, and SBR, TN removal rate was 50%, TP and NH3-N removal rate was. Study on enhanced biological phosphorus removal with carbon source,When in the experimental study of normal temperature conditions conducive to SBR biological treatment, glucose investment plus volume reached 60 mg / L, the indexes of water quality of the effluent can be to achieve "urban sewage treatment plant pollutant discharge standard" (GB18918-2002) in the level of a standard; when the experimental study in the winter low temperature (laboratory temperature below 5 DEG C), with the increase of dosage of glucose, cod is increased, when the glucose dosage > 110 mg / L, beyond the "urban sewage treatment plant pollutant discharge standard" (GB18918-2002) in the level of a standard limit value (less than or equal to 50 mg / L) of the effluent COD. At this time the effluent TP still can not reach the standard.
(3) improving phosphorus removal efficiency of SBR reactor aeration stage PAC chemical reagent, found that PAC dosage increased to the system in addition to nitrogen has certain inhibition, when PAC dosage mg/L dosage reached 80mg/L, the effluent can reach the standard of A (GB18918-2002), and found that the PAC dosage of 18 TP, the effluent can reach the standard of A (GB18918-2002). Key words: SBR process;Removal of nitrogen and phosphorus; external carbon sources; chemical phosphorus removal;