微电解-厌氧-好氧组合工艺处理染料废水

针对染料废水的色度大,有机物含量高,可生化性差的特点,采用了微电解-厌氧-好氧组合工艺处理染料废水。结果表明：该工艺对染料废水有很好的处理效果,最终出水COD为45～91mg/L,出水清澈无色,达到工业水污染物排放一级标准（GB8978-1996）,处理成本仅为1.57元/m^3废水。     

内电解-厌氧-好氧工艺处理垃圾渗沥液的研究

研究了高COD和高氨氮的生活垃圾渗沥液，在内电解－厌氧－好氧组合工艺下的处理效果及其影响因素，结果表明，内电解－厌氧－好氧组合工艺，应用在高COD、高氨氮（COD为10000－90000mg/L,氨氮＞600mg/L）生活垃圾渗沥液处理中，具有较高的COD和色度去除率，在全工艺流程下，COD的去除率达到99％以上，氨氮去除率达到90％以上。     

内电解-厌氧-好氧工艺处理制药废水试验研究

采用“内电解-厌氧-好氧”工艺处理混合制药废水，试验证明：在厌氧段HRT=120h，好氧段HRT=48h条件下，当混合废水进水CODcr约为18600mg／L时．总COD去除率可达90％以上，出水达到GB8978-96二级排放标准。     

铁炭微电解-厌氧-好氧工艺处理制浆造纸废水

针对某制浆造纸废水的特性,采用铁炭微电解—厌氧—好氧组合处理工艺。实验结果表明:当进水CODCr为2 500 mg/L,色度为300倍时,铁炭微电解预处理,不仅去除了40%的CODCr和80%的色度,还大幅提高了废水的可生化性,B/C从0.23提高到0.42;微电解出水经过厌氧和好氧处理,CODCr去除率分别为70%和55%,最终出水CODCr在250 mg/L以下,色度为50倍,达到《造纸工业水污染物排放标准》(GB 3544—2001)二级排放标准。     

厌氧-好氧工艺处理啤酒废水的工艺研究

本研究以啤酒厂污水为研究对象,采用厌氧-好氧工艺对啤酒废水进行处理,通过单因素实验考察温度、pH和时间对处理效果的影响。结果表明,厌氧-好氧工艺可以有效地降低啤酒废水的污染物浓度,最佳处理工艺条件为:厌氧条件下温度为35℃、pH为9、处理时间为2小时,好氧条件下温度为35℃、pH为8、处理时间为2小时。在最佳工艺条件下,啤酒废水的CODCr从1200 mg/L降低到32 mg/L,去除率为97.33%,氨氮从30 mg/L降低到7.354 mg/L,氨氮去除率为75.49%。此研究结果可为啤酒废水的处理提供理论依据及技术支撑。     

兼氧-好氧工艺处理高浓度化工废水

采用兼氧－－好氧联合工艺对高浓度难降解化工废水进行处理。论述了用该工艺处理化工废水时,温度、ＰＨ值、负荷、水力停留时间等因素对稳定性的影响。该工艺利用兼氧和好氧微生物对高浓度化工废水进行处理后,ＣＯＤｃｒ的去除率达９５％以上,氨氮的去除率达７０％以上,对色度有很好的去除效果,并且具有剩余污泥少、耐冲击负荷、费用低等优点,是一种高效、低能耗的废水处理工艺。     

箱板纸厂废水的厌氧-好氧处理

研究了厌氧-好氧组合工艺对箱板纸厂废水的处理效果。对CODCr、色度以及浊度去除率的研究结果表明．该废水在厌氧-好氧组合处理后可以达到制浆造纸工业水污染一级排放标准(GWPB2-1999)。     

厌氧-好氧工艺处理印染废水的试验研究

采用厌氧-好氧工艺处理某厂印染废水,对其设计了两种工艺流程,并进行了试验研究.通过试验数据证明,采用厌氧-好氧工艺,能够有效处理该厂废水,该工艺运行方便,成熟可靠,且运行费用低.     

混凝-厌氧水解-好氧组合工艺处理印染废水的研究

印染废水的色度大,有机物含量高,可生化性差。针对上述特点,采用了混凝一厌氧水解一好氧组合工艺处理印染废水。结果表明,该工艺对印染废水有很好的处理效果,最终出水CODCr为83～124mg／L,出水基本达到无色,达到纺织染整工业水污染物排放一级标准(GB4287-1992),处理成本为1．5元／t。     

厌氧-好氧组合工艺处理制药废水的试验研究

采用上流式厌氧污泥床反应器-移动床生物膜反应器串联装置,处理含有大量氨基酸和皂素的制药废水。系统的总COD去除率平均在86%左右。当厌氧反应器的COD容积负荷为10～21kg/(m3·d),COD去除率平均为70%左右;好氧反应器的COD容积负荷率为2.48～2.87kg/(m3·d),COD去除率为59%。     

厌氧生物法处理皂素废水的试验研究

采用UASB厌氧反应器处理高浓度皂素废水,试验结果表明,当温度控制在35～40℃、pH在6.8～7.5之间、COD容积负荷保持在6.0kg/(m3.d)时,COD去除率可达到90%以上。     

甘蔗渣湿法堆垛高浓度有机废水厌氧处理实验研究

对甘蔗渣喷淋废水进行了一系列的厌氧处理实验研究。结果表明，厌氧处理对废水中的CODcr及BOD5的去除有显著的效果。当废水的pH为7.5，水温为30-40℃，CODcr及BOD5分别为3000-9000mg/L和2000-5000mg/L时，CODcr及BOD5的去除率分别为90%和94%，为该废水治理达标排放奠定了基础。     

A three‐phase fluidized bed reactor in the combined anaerobic/aerobic treatment of wastewater

Aerobic degradation or polishing is an essential step in the combined anaerobic/aerobic treatment of wastewater. In this study, a type of porous glass beads was used for immobilization of microbial cells in a three‐phase aerobic fluidized bed reactor (AFBR) with an external liquid circulation. The effects of superficial gas and liquid velocities on bed expansion, solid and gas hold‐ups and specific oxygen mass transfer rate, k_La, were investigated. A tracer study showed that the mixing and flow pattern in the 8 dm³ reactor could be simulated by a non‐ideal model of two continuous stirred tank reactors (CSTRs) in series. By treating an effluent from an upflow anaerobic sludge blanket (UASB) digester, the distribution of suspended and immobilized biomass in the reactor as well as the kinetics of COD removal were determined. The specific oxygen mass transfer rate, k_La, at a superficial gas velocity of 0.7 cm s⁻¹ dropped by about 30% from 32 h⁻¹ in tap water to 22 h⁻¹ after a carrier load of 15% (v/v) was added. The measured k_La further dropped by about 20% to 18 h⁻¹ in the wastewater, a typical value of the bubbling fermenters with no stirring. Compared with the aerobic heterotrophs under optimum growth conditions, the microbes in this reactor which was fed with anaerobic effluent plus biomass behaved like oligotrophs and showed slow specific COD removal rates. This might be attributed to the presence of a significant amount of obligate anaerobes and facultative organisms in the aerobic reactor. This was confirmed by a relatively low intrinsic oxygen uptake rate of the microbial population in the reactor, 94 mg O₂ dm⁻³ h⁻¹ or 19 mg O₂g VS⁻¹ h⁻¹. © 1999 Society of Chemical Industry     

两级生物膜处理合成洗涤剂废水

采用厌氧生物滤池(AF)—好氧生物接触氧化(BCO)联合工艺对合成洗涤剂(LAS)废水进行处理试验。结果表明,AF反应器在HRT=24h、温度(32±2)℃、pH为7～8、营养母液质量浓度5mg/L条件下,BCO反应器在HRT=12h、常温、DO为4～5mg/L条件下,对LAS和COD的去除率分别可达到85%和95%,出水达到国家《污水综合排放标准》(GB8978—1996)规定的一级排放标准。     

高级氧化技术处理染料废水的研究进展

由于染料废水中含有高浓度难降解有机污染物,对其有效处理一直是个难题.综述了近几年国内外采用湿式氧化法、Fenton法、光化学与光催化氧化法、电化学法、臭氧氧化法、微波辅助氧化法和超声氧化法等高级氧化技术处理染料废水的进展情况,并指出了高级氧化技术在染料废水处理中的发展趋势.     

Combination of biological and chemical processes for the treatment of textile wastewater containing reactive dyes

The treatment of a segregated textile wastewater containing reactive dyes was investigated in two continuous‐flow process trains using ozonation and biological processes. The degree of decolorization and dissolved organic carbon (DOC) removal achieved by ozonation followed by aerobic treatment (two‐stage) was compared with that found when an anaerobic and aerobic pretreatment was added (four‐stage). Although the biological pretreatment reduced color by ～70%, similar amounts of ozone were required in both trains to achieve high degrees of overall removal of color and DOC. In both trains, ozonation increased biodegradability in the following aerobic reactor, however, in order to reach ～80% overall DOC removal, a specific ozone absorption (A*) of ～6 gO₃ gDOC_o^?1 was required and >50% of the DOC was mineralized in the ozone reactor. A comparison of cost estimates based on investment and operating costs for the process alternatives showed that a four‐stage train would reduce costs only if it enabled a decrease in A* to less than 2 gO₃ gDOC_o^?1. Difficulties in comparing treatment processes for segregated vs full‐stream wastewaters are discussed. Copyright © 2003 Society of Chemical Industry