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陈红 《浙江大学学报(A卷英文版)》2004,5(6):727-732
Specific ATP content of volatile solids was measured to characterize the sludge activity in a sequential anaerobic/aerobic wastewater treatment system, with an upflow anaerobic sludge blanket (UASB) reactor and a three-phase aerobic fluidized bed (AFB) reactor. The wastewater COD level was 2000(3000 mg/L in simulation of real textile wastewater. The ATP content and the specific ATP contents of volatile solids at different heights of the UASB reactor and those of the suspended and immobilized biomass in the AFB reactor were measured. In the UASB reactor, the maximum value of specific ATP (0.85 mg ATP/g VS) was obtained at a hydraulic retention time (HRT) 7.14 h in the blanket solution. In the AFB reactor, the specific ATP content of suspended biomass was higher than that of immobilized biomass and increased with hydraulic retention time reaching a maximum value of 1.6 mg ATP/g VS at hydraulic retention time 4.35 h. The ATP content of anaerobes in the UASB effluent declined rapidly under aerobic conditions following a 2nd-order kinetic model. 相似文献
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研究了组合工艺(高温55℃UASB反应器一常温三相好氧生物流化床)对含盐偶氮染料活性嫩黄X-6G的去除能效。试验结果表明:在水温为55℃,运行周期120d,水力停留时间18h的条件下,此工艺对于CODCr为600～1 000mg/L,含盐量为25～35g/L,活性嫩黄X-6G的浓度为40～50mg/L的染料废水,染料及CODCr的去除率可达80%～90%。 相似文献
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INTRODUCTION Coking wastewater is generated in the produc- tion of coke, coal gas, tar and other coke by-products The coking wastewater includes inorganic pollutants such as ammonia, cyanogen, sulfocyan, heterocycle compounds and polycyclic aromatic compounds such as phenol, oils, naphthalene, pyridine, quinoline and anthracites, which are difficult to biodegradation under aerobic conditions (Ganczarczyk, 1972). Dis- charge of coking wastewater to the environment may cause severe contamin… 相似文献
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为了快速培养出能同时去除生活污水中化学需氧量(COD)和氮的微氧颗粒污泥,采用膨胀颗粒污泥床(EGSB)反应器接种污水处理厂剩余污泥,研究了微氧颗粒污泥的培养过程以及稳定运行条件下供氧量对处理效果和污泥性能的影响。结果表明,水力停留时间(HRT)为6h,微氧颗粒污泥的成功培养仅需1个月;供氧速率在2.83.2gO2/d,COD,NH3-N和总氮(TN)的去除率最高分别可达91%,85%和81%,脱氮速率达1.7gN/d,出水水质最佳;成熟的微氧颗粒污泥粒径集中在0.453.2gO2/d,COD,NH3-N和总氮(TN)的去除率最高分别可达91%,85%和81%,脱氮速率达1.7gN/d,出水水质最佳;成熟的微氧颗粒污泥粒径集中在0.452mm,当供氧速率低于2.3gO2/d时,颗粒污泥结构致密,供氧速率在2.32mm,当供氧速率低于2.3gO2/d时,颗粒污泥结构致密,供氧速率在2.33.2gO2/d时,污泥性能稳定,供氧速率增加到3.2gO2/d时,污泥沉降性能下降,并出现颗粒解体和丝状菌生长优势。 相似文献
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啤酒厂厌氧池(UASB)的调节与恢复 总被引：1，自引：0，他引：1
针对某啤酒厂污水处理过程中使用的升流式厌氧池(UASB)进行了调节与恢复,通过监测厌氧池的pH与COD等数据找出UASB反应器处理效果差的原因,然后对三相分离器、布水管等进行调整,并二次启动厌氧池,恢复了UASB反应器的处理功能. 相似文献
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A sequencing batch reactor (SBR) seeded with activated sludge was established for landfill leachate treatment. Small bio-aggregates
began to appear after 40-d operation, and gradually changed to mature aerobic granules, with a mean size of 0.36–0.60 mm.
Their sludge volume index at 5 min (SVI5 min), mixed liquor volatile suspended solids (MLVSS), and wet density were around 35 ml/g, 3.4 g/L, and 1.062 g/cm3, respectively. The settling velocities of the granules in distilled water ranged from 0.3 to 1.3 cm/s, which were faster
than those in landfill leachate with a salt content of 1.4% (w/v), and also slightly faster than those predicted by Stokes’
law for porous but impermeable particles. Microbial community evolution during the granulation process and stages under different
nitrogen loading rates (NLRs) were monitored and analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis
(PCR-DGGE), cloning, and sequencing of 16S ribosomal RNA (rRNA) fragments. Results revealed that some primary and dominant
communities in inoculating activated sludge died out gradually; while a few common bacteria, inhabiting soils, municipal wastewater,
or activated sludge systems, dominated in the SBR system throughout. In addition, some other dominant species, associated
with the aerobic granulation process, were thought to play a significant role in the formation and growth of aerobic granular
sludge. During the stable operation time under low NLR, a few species were present in abundance, and may have been responsible
for the high organic removal efficiency at this time. 相似文献
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The characteristics of the start-up period of single-step autotrophic nitrogen removal process were investigated. The autotrophic nitrogen removal process used a sequencing batch reactor to treat wastewater of medium to low ammonia-nitrogen concentration, with dissolved oxygen （DO）, hydraulic retention time （HRT） and temperature controlled. The experimental conditions were temperature at （30±2） ℃, ammonia concentration of （60 to 120） mg/L, DO of （0.8 to 1.0） mg/L, pH from 7.8 to 8.5 and HRT of 24 h. The rates of nitrification and nitrogen removal turn out to be 77% and 40%, respectively, after a start up period going through three stages divided according to nitrite accumulation： sludge domestication, nitrifying bacteria selection and sludge adaptation, It is demonstrated that dissolved oxygen is critical to nitrite accumulation and elastic YJZH soft compound packing is superior to polyhedral hollow balls in helping the bacteria adhere to the membrane. 相似文献
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污水厌氧生物处理研究回顾与展望 总被引：1，自引：0，他引：1
在世界能源紧缺和环境污染不断加剧的背景下,污水厌氧生物处理技术经济可行,该技术能适应社会和环境的可持续发展要求,势必成为21世纪污水处理领域的核心技术.本文回顾了污水厌氧生物处理技术的发展历程,同时指出了污水厌氧生物处理过程中存在的问题及当前研究热点,并对其未来发展趋势作以展望. 相似文献
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Xiang Hu Dominika Sobotka Krzysztof Czerwionka Qi Zhou Li Xie Jacek Makinia 《Journal of Zhejiang University. Science. B》2018,19(4):305-316
The effects of two different external carbon sources (acetate and ethanol) and electron acceptors (dissolved oxygen, nitrate, and nitrite) were investigated under aerobic and anoxic conditions with non-acclimated process biomass from a full-scale biological nutrient removal-activated sludge system. When acetate was added as an external carbon source, phosphate release was observed even in the presence of electron acceptors. The release rates were 1.7, 7.8, and 3.5 mg P/(g MLVSS·h) (MLVSS: mixed liquor volatile suspended solids), respectively, for dissolved oxygen, nitrate, and nitrite. In the case of ethanol, no phosphate release was observed in the presence of electron acceptors. Results of the experiments with nitrite showed that approximately 25 mg NO2-N/L of nitrite inhibited anoxic phosphorus uptake regardless of the concentration of the tested external carbon sources. Furthermore, higher denitrification rates were obtained with acetate (1.4 and 0.8 mg N/(g MLVSS·h)) compared to ethanol (1.1 and 0.7 mg N/(g MLVSS·h)) for both anoxic electron acceptors (nitrate and nitrite). 相似文献
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朱甜甜 《西安文理学院学报》2011,(2):89-92
介绍了移动床生物膜反应器的工艺原理以及不同于其他生物膜反应器的工艺特点,讨论了MBBR中填料的材质、大小、形状、比重、数量及其有效比表面积,搅拌类型和搅拌方式,有机负荷的大小,水力停留时间等因素对移动床生物膜反应器运行效果的影响,综述了单独MBBR工艺、MBBR与活性污泥共池的工艺、MBBR与其他工艺的组合工艺在污水处... 相似文献
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综合讨论了厌氧折流板反应器(ABR)工艺特征,阐述了国内外关于ABR启动及实际应用的研究现状。认为ABR具有耐冲击负荷、对有毒物质适应性强、固液分离效果好等显著特点。因此,ABR作为一种新型高效生物处理技术,在我国废水处理中,特别是对高浓度有毒工业废水处理具有良好的研究开发价值。 相似文献
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By combining sequencing batch reactor （SBR） activated sludge process and constructed wetland （CW）, this study is to achieve the domestic wastewater treatment. Our purpose was to determine the optimum operating parameters of the combined process. The process involved advantages and shortages of SBR and CW. Under normal temperature, the 3rd cycle （SBR’s operation cycle is 8 h： inflow for 1 h, limited aeration for 3 h, sediment for 1 h, outflow for 1 h, and idling for 2 h; CW’s hydraulic retention time （HRT） is 24.8 h and hydraulic loading is 24.5 m^3/m^2 d） was the best cyclic mode. The effluents can meet the standard GB/T18921-2002： “The reuse of urban recycling water： water quality standard for scenic environment use”. In the 3rd cycle, the efficiency of CW was the maximum, and energy consumption of SBR was the minimum. Under the condition of low dissolved oxygen, the removing efficiency of chemical oxygen demand （COD） and ammonia was not affected obviously. Simultaneously, nitrification and denitrification phenomena occured and phosphorus was absorbed obviously. 相似文献
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An expanded granular sludge bed (EGSB) reactor inoculated with anaerobic granular sludge was started up with its COD removal performance, self-balancing of pH, biogas production rate and characteristics of the granular sludge during the start-up period being investigated. The results indicated that the EGSB reactor can be started up successfully in 27 d by increasing the organic loading rate rapidly. The removal efficiency of COD was maintained above 93% with influent COD concentration of 25 000 mg/L and OL... 相似文献
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徐功娣 《上海大学学报(英文版)》2006,10(2):179-184
1Introduction Dyeingwastewaterisakindofindustrialwastewater whichisdifficulttotreat.Itcontainsnotonlyhigh concentrationsofbiggermolecules,e.g.,nitryland aminocompounds,butalsoalargeamountofheavy metals,whicharetoxiccompositionformostof micro organisms.The… 相似文献
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论述了总有效容积2000m3的新型UASB装置,在中温条件下处理高浓度木薯酒精废水的启动运行和污泥含量控制的过程．当反应器稳定运行时,容积负荷可达7kgCOD／（m3·d）,水力停留时间为2d,污泥保持量在30％-41;％,COD去除率达95％以上,出水COD小于500mg／L． 相似文献
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梁晶 《南通职业大学学报》2014,(4):80-84
对臭氧-曝气生物滤池（BAF）技术在印染废水中的应用进行了研究,结果表明,臭氧投加量为15 mg/L,臭氧与废水的接触时间为60 min时,废水的B/C由0.1提高到0.23左右,印染废水的生化性得到较大的提高;同时,当BAF的停留时间达到3 h时,出水的CODcr为48.22 mg/L、BOD5为9.54 mg/L、SS为8.17 mg/L、色度为18时,出水水质达到相关标准。 相似文献
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采用小型动态厌氧反应器(UASB)法和直接混凝两种方法对生物制药产生的废水进行预处理试验研究。结果表明:针对COD cr浓度为18000mg/L的废水,经USBA系统20小时处理,排放水质能达到COD cr≤5000mg/L以下。 相似文献