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1.
Combined treatment of landfill leachate with fecal supernatant in sequencing batch reactor 总被引：2，自引：1，他引：1
A laboratory-scale sequencing batch reactor （SBR） is used to treat landfill leachate containing high concentration of ammonium nitrogen with municipal fecal supernatant. The SBR system is operated in the following sequential phases： fill period, anoxic period, aeration period, settling period, decant and idle period. The results indicated that the average removal efficiencies of COD, BOD5, TN, NH4^＋-N were 93.76%, 98.28%, 84.74% and 99.21%, respectively. The average sludge removal loading rates of COD, BOD5, TN and NH4^＋-N were 0.24 kg/（kg SS.d）, 0.08 kg/（kg SS.d）, 0.04 kg/（kg SS.d） and 0.036 kg/（kg SS.d）, respectively. Highly effective simultaneous nitrification and denitrification was achieved in the SBR system. The ratio of nitrification and denitrification was 99% and 84%, respectively. There was partial NO2^- denitrification in the system. 相似文献
2.
基于水环境容量的面源污染削减率估算方法探讨:以深圳市为例(英文) 总被引：1，自引：0，他引：1
以深圳市为例,采用单元分析与多元分析相结合的手段,探讨了一种基于城市水环境容量估算面源污染负荷削减率的方法在环境规划中的实际应用.计算结果表明:对于COD指标,67%~74%的面源污染负荷削减率即可满足深圳市规划后环境容量的限制;而对于NH4-N,TP和BOD5,仅依靠削减面源污染负荷则无法满足规划要求.因此,在城市水环境质量规划过程中,应针对不同流域及目标污染物种类,制定"量体裁衣"式的水环境控制策略,而非采用一成不变的措施. 相似文献
3.
根据酱菜废水的水质特点,采用两级SBR处理酱菜废水,对其处理效能进行了研究。结果表明：室内温度维持在17～22℃,进水有机物浓度在3000mg/L,DO为4.2mg/L,反应器运行工况为进水0.5h—曝气8h—沉淀1h—滗水0.5h—待机2小时的条件下,二级SBB反应器对BOD、COD、TN、NH4＋-N、TP的去除率分别达到98.3%、97.5%、88.7%、97.1%、52.4%。 相似文献
4.
以沙溪河县段主要污染无SS、DO、CPDma、BOD5、NH3-N、NO2-N、NO3-N、挥发C4H5-OH、总硬度为参评因子采用Daniel的趋势实验,分析沙溪河县段近7年各期水质的变化趋势、结果表明除总硬度外其它主要污染物均有不同趋势的下降. 相似文献
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任朝斌 《南阳师范学院学报》2013,12(6):14-17
采用"内循环厌氧反应器-缺氧/好氧工艺"处理维生素生产废水.试验结果表明:系统处理效率高,维护管理方便,处理后的水水质稳定,COD=108 mg·L-1,BOD5=23 mg·L-1,ρ(SS)=42 mg·L-1,ρ(NH3-N)=12 mg·L-1,pH=7.1,达到《发酵类制药工业水污染物排放标准》(GB21903-2008)要求。 相似文献
7.
本文在以复合式膜生物反应器系统为基础,以模拟城市污水为处理对象。通过运行条件优化研究,综合脱氮除磷效果及经济因素,将复合区水力停留时间控制在7h左右。此时系统总去除率为:CODcr≧96.28%、NH3-N≧97.54%、TN≧74.87%、TP≧74.34%,出水可以稳定保证在CODcr≦14.35mg/L、NH3-N≦0.74mg/L、TN≦9.02mg/L、TP≦1.05mg/L。效果较好。 相似文献
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ZHANG Hong-jing LONG Teng-rui CAO Yan-xiao 《重庆大学学报(英文版)》2006,5(3):152-156
1 Introduction ? The biological aerated filter technique has developed rapidly since 1980s, and is widely used in municipal sewage treatment. It has been used in the primary and secondary treatment processes due to its desirable economical efficiency and … 相似文献
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通过对晋城市巴公污水处理厂工艺改进前后两年同期运行数据的对比发现：COD去除率比较稳定,但在问一水温奈件下,技改后的C01）去除率略高于技改前;技改后NH3-N去除率2009年前半年有一定提高,后半年效果不明显,但出水总氯浓度有所降低;污泥负荷不稳定,相同污泥负荷条件下,技改后的NH3-N去除率高于技改前基于对主要影响因子的分析,建议在厌氧段前增设缓冲池稳定进水水质,提高碳氛比,在曝气池前加加热池、用废弃蒸汽或电加热等手段增强保温等措施、 相似文献
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This paper describes the NiiMi process designed to treat landscape water. The main aim of the research was to investigate the feasibility of NiiMi for removing organic and nutriment materials from landscape water. During the batch-scale NiiMi operation, the removal rates of color ranged from 66.7%o-80% , of turbidity from 31.7%-89.3%o, of chemical oxygen demand （COD） from 7%-36.5%, of total phosphor （TP） from 43%-84.2%, of soluble phosphate from 42.9%-100%, of total nitrogen （TN） from 4.2%-46.7%, and of NH4^＋-N from 39.3%-100% at the hydraulic loading of 0.2 m^3/（m^2·d）. Results showed that the removal efficiencies of COD, TP, soluble phosphate and TN decreased with the decline in the temperature. The NiiMi process had a strong shock loading ability for the removal of the organics, turbidity, TP, soluble phosphate, TN and NH4^＋-N. Three sodium chloride tracer studies were conducted, labeled as TS 1, TS2, and TS3, respectively. The mean hydraulic retention times （mean HRTs） were 31 h and 28 h for TSI and TS2, respectively, indicating the occurrence of a dead zone volume of 12% and 20% for TS 1 and TS2, respectively. TS 1 and TS2 displayed the occurrence of short-circuiting in the NiiMi system. The comparison results between TS1 and TS2 were further confirmed in the values obtained for some indicators, such as volumetric efficiency （e）, short-circuiting （S）, hydraulic efficiency （2） and number of continuously stirred tank reactors （N）. 相似文献
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To explore the applicability of anoxic-oxic （A/O） activated sludge process for petrochemical wastewater treatment, the relationship between bacterial community structure and pollutants loading/removal efficiencies was investigated by gas chromatograph-mass spectrometry （GC-MS）, polymerase chain reaction-denaturing gradient gel electrophoresis （PCR-DGGE） and other conventional techniques. It showed that when the concentrations of the influent chemical oxygen demand （COD） and ammonia nitrogen （NH4＋^-N） were 420-560 mg/L and 64-100 mg/L, respectively, the corresponding average effluent concentrations were 160 mg/L and 55 mg/L, which were 1.6 and 2.2 times higher than those of the national standards in China, respectively, demonstrating the inefficient performances of A/O process. Analysis of GC-MS indicated that refractory pollutants were mainly removed by sludge adsorption, but not by biodegradation. PCR-DGGE profile analysis suggested that the biological system was species-rich, but there was apparent succession of the bacterial community structure in different locations of the A/O system. Variations of bacterial community structure and pollutant loadings had obvious influences on pollutants removal efficiencies. Thus, A/O process was inapplicable for the treatment of complicated petrochemical wastewater, and strategies such as the reinforcement of pre-treatment and two-stage A/O process were suggested. 相似文献
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Ying SONG Yu-ting HUANG Hong-fang JI Xin-jun NIE Zhi-yuan ZHANG Chuan GE An-cheng LUO Xin CHEN 《Journal of Zhejiang University. Science. B》2015,16(2):145-154
题目：改良型多介质土壤渗滤系统对甲鱼养殖废水的净化效果研究
目的：通过向多介质土壤渗滤系统（MSL）的土壤层添加污泥,研究改进后的系统对工厂化甲鱼养殖废水的处理效果,分析系统内微生物群落的变化,以期部分揭示其可能的作用机理。
创新点：工厂化甲鱼养殖废水排放量日益增大,且水体氨氮含量较高。目前市场上缺乏针对甲鱼养殖废水的处理技术,MSL系统对该废水的处理也未有报道。本文在 MSL 系统的基础上进行改良,并将其应用于甲鱼养殖废水处理上,提出一套有效的甲鱼养殖废水处理技术,并对 MSL 系统内微生物群落结构进行了分析。
方法：向4套MSL小试装置中分别添加0%、5%、10%和20%污泥,研究其对工厂化甲鱼养殖废水的净化效果。试验中水质指标测定均按国家标准方法进行,系统内微生物群落结构采用聚合酶链反应-变性梯度凝胶电泳（PCR-DGGE）法测定。
结论：MSL系统可有效地处理工厂化甲鱼养殖废水,向系统中添加20%污泥后处理效果更佳。添加20%污泥的系统内具有较高的硝化类细菌多样性和都较多的生物量。 相似文献
目的：通过向多介质土壤渗滤系统（MSL）的土壤层添加污泥,研究改进后的系统对工厂化甲鱼养殖废水的处理效果,分析系统内微生物群落的变化,以期部分揭示其可能的作用机理。
创新点：工厂化甲鱼养殖废水排放量日益增大,且水体氨氮含量较高。目前市场上缺乏针对甲鱼养殖废水的处理技术,MSL系统对该废水的处理也未有报道。本文在 MSL 系统的基础上进行改良,并将其应用于甲鱼养殖废水处理上,提出一套有效的甲鱼养殖废水处理技术,并对 MSL 系统内微生物群落结构进行了分析。
方法：向4套MSL小试装置中分别添加0%、5%、10%和20%污泥,研究其对工厂化甲鱼养殖废水的净化效果。试验中水质指标测定均按国家标准方法进行,系统内微生物群落结构采用聚合酶链反应-变性梯度凝胶电泳（PCR-DGGE）法测定。
结论：MSL系统可有效地处理工厂化甲鱼养殖废水,向系统中添加20%污泥后处理效果更佳。添加20%污泥的系统内具有较高的硝化类细菌多样性和都较多的生物量。 相似文献
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小城镇污水具有水质不稳定,可生化性好,污水中悬浮物浓度、氮和磷的含量较高等特点.以四川省茂县城镇污水处理工艺设计为例,探讨CASS（Cyclic Activated Sludge System）工艺在小县城污水处理工程的适用性及处理效果.通过计算关键技术参数（污泥负荷：0.15 kg·BOD5·kg^-1·MLSS·d^-1）;排水比：1/4;反应周期：进水2h,曝气4h,沉淀0.8h,出水1.2h）以及时污水处理效果进行分析.结果表明：CODCr进水浓度：244～434 mg·L^-1,出水为21 ～40 mg·L^-1;BOD5进水浓度：150 ～250 mg·L^-1,出水12～20 mg·L^-1;NH4-N进水浓度：25～45mg·L^-1,出水2.0～6.0 mg·L^-1;TP进水浓度：2.0～5.4 mg·L^-1,出水0.2～1.0 mg·L^-1.CASS工艺处理污水的效果良好,出水水质达到《国家城镇污水处理厂污染物排放标准》（GB 18918-2002） 1B要求,CASS工艺适用于茂县城镇污水处理.研究结果可为偏远的经济落后地区的污水处理工艺选择和运行方面提供技术参考. 相似文献
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为探索EM菌在淡水水质净化处理中的作用,以不同的EM菌液浓度（VEM/V污水为0‰、0.1‰、0.5‰、1‰、5‰）在有氧通风、常温条件下处理天心湖水样,通过测定湖水样处理前后的pH、SS、色度、COD和氨氨水平变化,评价EM菌对淡水水质的处理效果,研究结果表明：浓度为0.1‰的EM菌液处理对天心湖水的COD去除效果最佳;浓度为1‰的EM菌液对天心湖水的氨氮去除效果最佳;浓度为5‰的EM菌液处理使湖水COD、氨氮水平升高,水质反而受到污染.通过选择EM浓度、处理时间、处理温度三个影响因素,按L9（34）正交表进行正交实验,结果表明EM处理天心湖水的最佳工艺条件是：处理时间7d、处理温度30℃、EM浓度0.2‰,对COD的去除率达到36.52％;按上述正交实验最佳工艺条件进行验证实验,结果表明,对天心湖水中COD的去除率可达到35.47％,对生活污水处理COD去除率可达41.18％.本实验可为进一步研究EM在水质处理上的应用提供参考. 相似文献
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根据2005年5月的南水北调中线水源区调查资料,对其粪大肠菌群及异养细菌的丰度和分布进行了研究,并分析了其与环境因子的相关关系。结果表明,南水北调中线水源区粪大肠菌群数量分布主要受陆源性物质的支配,呈现近岸高,库心未被检出的特征;而异养细菌分布特征为近岸比库心较多。粪大肠杆菌和异养细菌的分布与NH3-N、TN、Chla呈正相关,与TP、COD、T和pH关联性不明显,与BOD、SD呈负相关关系。 相似文献
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针对农村生活污水的水质特点,采用厌氧-复合人工湿地组合工艺处理农村生活污水,结果表明,厌氧池对SS的去除率为80.6%;复合人工湿地对COD、TN的去除率分别为61%和61.4%,对TP的去除率在57%～66%之间。 相似文献
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ZHAO Li-jun MA Fang GUO Jing-bo ZHAO Qing-liang 《浙江大学学报(A卷英文版)》2007,8(11):1831-1838
In solving the deterioration of biological treatment system treating petrochemical wastewater under low temperatures, bioaugmentation technology was adopted by delivering engineering bacteria into a pilot-scale two-stage anoxic-oxic (A/O) process based on previous lab-scale study. Experimental results showed that when the concentrations of COD and NH4 -N of the influent were 370~910 mg/L and 10~70 mg/L, the corresponding average concentrations of those of effluent were about 80 mg/L and 8 mg/L respectively, which was better than the Level I criteria of the Integrated Wastewater Discharge Standard (GB8978-1996). According to GC-MS analysis of the effluents from both the wastewater treatment plant (WWTP) and the pilot system, there were 68 kinds of persistent organic pollutants in the WWTP effluent, while there were only 32 in that of the pilot system. In addition, the amount of the organics in the effluent of the pilot system reduced by almost 50% compared to that of the WWTP. As a whole, after bioaugmentation, the organic removal efficiency of the wastewater treatment system obviously in- creased. 相似文献
18.
水解酸化-厌氧-好氧工艺处理罐头食品加工废水 总被引：1，自引：0，他引：1
罐头食品生产废水是易降解高浓度有机废水,根据废水的水质特点,采用水解酸化-厌氧-好氧法多级流程联合处理。运行结果表明,该工艺处理效果良好,工艺运行稳定,系统总COD去除率达95.6%;BOD5总去除率达98.6%;SS总去除率为93.3%;色度平均总去除率为94.6%。出水各项指标均优于《污水综合排放标准》(GB8978—1996)中二级标准的要求。 相似文献
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试验以实验室自配的污水模拟小城镇生活污水,基于悬挂填料AmOn一体化反应器,通过调节蠕动泵转速和气体流量计考察水力停留时间和曝气量对COD(Cr)、NH4+-N、TN、TP去除率的影响。试验结果显示,当HRT=14h时,各污染物去除率分别为89.15%、99.02%、48.59%、32.47%;当曝气量为600 L/h,为89.87%、99.74%、81.3%、35.04%。最终采用层次分析法,从污染物去除效率、处理效率、运行成本三个角度进行综合评价,得出水力停留时间14h、曝气量600L/h的工况为试验的最优工况。 相似文献