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味精浓度水稀释液厌氧消化—SBR工艺处理 总被引:5,自引:0,他引:5
采用UBF-SBR工艺处理味精浓度水稀释液,UBF段的进水CODcr18900mg/L,NH3-N1500mg/L,有机容积负荷率9.45kg(COD)/m^3.d时,CODcr平均去除率为84.5%,SBR段的进水CODcr2950mg/L,NH3-N1678mg/L,曝气65h,DO为4~4.5mg/L,停曝气时DO在0.3mg/L以下,CODcr和NH3-N的平均去除率分别为92%和99.4 相似文献
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厌氧酸化—好氧法处理高浓度洗毛废水尾浆试验研究 总被引:2,自引:0,他引:2
采用厌氧酸化-好氧工艺对高浓度洗毛废水尾浆进行处理。试验结果表明,对于COD为25000mg/L的原废水,经1d的厌氧酸化和1d的二段串联的间歇活性污泥法好氧曝气处理,COD和BOD5的总去除率分别达到92%和99%以上,生化处理出水COD为1500~2000mg/L,BOD5<60mg/L。 相似文献
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水解酸化-好氧生物处理天然气脱硫废水的试验研究 总被引:3,自引:0,他引:3
通过对环丁砜法脱除天然气中硫生产工艺中产生的废水的试验研究表明,采用生物水解酸化 好氧生物处理工艺较适宜。当进水CODCr和BOD5浓度分别为465mg/L和195mg/L,水解酸化停留时间12h,好氧生物接触氧化塔停留时间5h时,连续动态试验出水CODCr和BOD5分别为42mg/L和16mg/L,CODCr和BOD5的去除率分别达91%和92% 相似文献
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研究了UBF-SBR工艺中UBF段的几个运行参数,在35℃,进水CODcr15546mg/L,NH3-N1214mg/L,有要容积负荷率7.55kg(COD)/m^3.d时,运行最佳。其CODcr去除率为93.9%,产气率为0.64m^3(气)/为5.46kg(COD)/m^3.CODcr去除率为91.4%。并气率为0.59m^3(气)/去除率kg(COD),CH4含量为57.5%,两者出水PH均 相似文献
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水葫芦—水草人工湿地系统在再生浆造纸废水处理中的应用研究 总被引:20,自引:0,他引:20
通过对水葫芦--水草人工湿地处理再生浆造纸废水的试验研究表明,在进水pH:7.12-7.49,BOD5、CDOCr、SS浓度分别为440.5mg/L、354.2mg/L、290.7mg/L,水力负荷0.05m/d条件下,BOD5、CODCr、SS的去除率分别为98%、93%和89%。系统性能稳定,出水水质达到排放标准且可用于农灌,具有一定的经济效益和较好的环境效益。 相似文献
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不完全厌氧一好氧同反应器工艺是通过时段切换在同一反应器内实现印染废水处理的过程。结果表明,反应器体积为30L,水力停留时间为12h总CODcr去除率达85%,总BOD5达94.3%,总色度为87.5%,处理出水CODcr为140mg/L,BOD5为8mg/L,色度为50倍,达到了国家二级排放标准,实验表明,经厌氧时间段后,BOD5/CODcr由0.15提高到0.37,色度由400倍降至50倍,为好 相似文献
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生物膜法A/O系统处理腈纶废水工业试验 总被引:5,自引:0,他引:5
本工业试验规模为1400—1600t/d,装置A/O容积比1:3,当平均停留时间22.6h,回流比3.2,水温约35℃左右时,平均去除率CODcr达88.36%、BOD597.49%、TN77.67%、AN99.41%。出水各项指标平均值为CODCr53.57mg/L、BOD55.6mg/L、TN14.94mg/L、NH3-N6.92mg/L、AN1.02mg/L、NaSCN2.67mg/L,SS仅20mg/L,因此不设二沉池。 相似文献
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Nitrogen removal via nitrite from municipal landfill leachate 总被引:2,自引:0,他引:2
A system consisting of a two-stage up-flow anaerobic sludge blanket (UASB), an anoxic/aerobic (A/O) reactor and a sequencing
batch reactor (SBR), was used to treat landfill leachate. During operation, denitrification and methanogenesis took place simultaneously
in the first stage UASB, and the e uent chemical oxygen demand (COD) was further removed in the second stage UASB. Then the
denitrification of nitrite and nitrate in the returned sludge by using the residual COD was accomplished in the A/O reactor, and ammonia
was removed via nitrite in it. Last but not least, the residual ammonia was removed in SBR as well as nitrite and nitrate which were
produced by nitrification. The results over 120 d (60 d for phase I and 60 d for phase II) were as follows: when the total nitrogen
(TN) concentration of influent leachate was about 2500 mg/L and the ammonia nitrogen concentration was about 2000 mg/L, the shortcut
nitrification with 85%–90% nitrite accumulation was achieved stably in the A/O reactor. The TN and ammonia nitrogen removal
e ciencies of the system were 98% and 97%, respectively. The residual ammonia, nitrite and nitrate produced during nitrification in
the A/O reactor could be washed out almost completely in SBR. The TN and ammonia nitrogen concentrations of final e uent were
about 39 mg/L and 12 mg/L, respectively. 相似文献
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文章用厌氧颗粒污泥接种启动UASB反应器,通过调节碱度和出水回流来实现浓缩果汁废水在低碱度下的稳定运行。研究结果表明:经35天UASB反应器可完全启动,负荷为9.5gCOD(/L·d),COD去除率在80%以上;回流比为0.3,进水碱度和pH值分别为1500mg/L和6.75、1000mg/L和6.52时,反应器能够稳定运行;采用出水回流的方法可以使酸性的浓缩果汁废水厌氧处理大幅度降低用碱量甚至完全不加碱的条件下实现稳定运行,本试验在回流比为8~10时,反应器也有很好的处理效果。通过对其控制条件实验室研究,显著的降低了浓缩果汁废水的处理成本,在工程上具有广泛的应用性。 相似文献
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研究了升流式厌氧污泥床反应器(UASB)在高温条件下处理含盐活性红2(RR2)染料废水的工艺及RR2的降解机理.结果表明:运行温度为(55±1)℃,水力停留时间为12 h,进水ρ(NaCl),ρ(CODCr)和ρ(RR2)分别为50 000,1 000和100 mg/L的条件下,以驯化好的厌氧颗粒污泥为接种污泥, 运行10 d后反应器达到稳定,CODCr和RR2去除率分别为25%和90%以上.利用气相色谱-质谱联用(GC-MS)分析厌氧出水发现, RR2的生物降解途径为在厌氧条件下最先被还原的是较易断裂的偶氮键(NN),去除颜色后形成了芳香胺类化合物,一部分芳香胺类化合物通过水解和氧化作用进一步降解为更小分子的代谢物. 相似文献
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UASB处理高浓度精细化工综合废水的启动研究 总被引:1,自引:0,他引:1
通过实验室小试,研究了UASB反应器对于精细化工废水中高浓度、难降解有机污染物的去除。在水质监测的基础上,研究了UASB反应器启动过程中各指标变化规律;比较了不同的水力负荷与进水COD浓度对工艺运行的影响;比较了VFA与出水COD的相关性;培养出了成型的颗粒污泥。UASB反应器进水COD浓度达到3 500 mg/L时,容积负荷达到7.0 kgCOD/(m^3.d)。试验证明,采用“UASB+好氧”工艺可改善化工废水的可生化性,可有效去除高浓度化工废水中难降解的有机污染物。 相似文献
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含盐染料废水高温厌氧处理工艺特性研究 总被引:2,自引:0,他引:2
研究升流式厌氧污泥床反应器(UASB)在高温条件下处理含盐染料废水的工艺特性及颗粒污泥性能。结果表明,在以常温厌氧絮状污泥为接种污泥,运行温度为(55±1)℃,水力停留时间为12h,含盐量为50000mg/L,CODCr为900~1000mg/L,染料活性红2(RR2)浓度为100mg/L条件下,78d达到运行稳定,CODCr和RR2去除率分别为44%和85%以上。反应器中高温耐盐厌氧颗粒污泥粒径为1.0~2.0mm,其生物相组成以短杆菌、球菌、丝状菌为主。 相似文献
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UBF与UASB两相厌氧系统处理Zn5-ASA医药废水的研究 总被引:4,自引:0,他引:4
采用以铁屑为填料的UBF反应器作酸化相、以UASB反应器作甲烷相的两相厌氧系统处理Zn5-ASA医药废水。实验结果表明:此系统在UBF与USAB的HRT分别控制在5.95h和11.43h时,UBF与UASB的OLR(以COD计)分别高达58.44和17.01kg/(m3.d),对SCOD和BOD5的总去除率分别达90%和95%左右,具有系统运行稳定、处理效率高等优点。系统中UBF反应器所选用的铁屑填料,通过微电解作用,能够有效提高废水的可生化性,且可省去通常的调碱工序,为难降解有机废水的处理开辟了新途径。 相似文献
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在中温两相厌氧工艺处理玉米酒精废水的基础上,进行产甲烷改良UASB的启动试验和颗粒污泥的培养,考察水力条件对反应器处理效果的影响。试验采用低负荷启动方式,通过增大处理量和提高进水COD浓度逐级提高容积负荷,通过强制内回流控制反应器中水力条件,使产甲烷改良UASB在最佳条件下运行。63 d后反应器中形成的污泥床颗粒化程度高,粒径>0.7 mm的颗粒污泥占82%以上,产气速率和COD去除率分别达到539 L/d和90%,产甲烷改良UASB启动顺利完成;改良UASB作为两相厌氧工艺的产甲烷相可以自行调节其进水pH,启动时pH的人工调节可以在反应器进入颗粒污泥成熟期时停止;反应器的最佳水力条件为:上升流速为0.62 m/h、回流比300%;最优操作条件下产甲烷改良UASB具有良好的抗冲击负荷能力。 相似文献
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Degradation of phenol in an upflow anaerobic sludge blanket (UASB) reactor at ambient temperature 总被引:2,自引:0,他引:2
IntroductionPhenolistherawmaterialforthecommercialproductionofawidevarietyofresins ,includingphenolicresinsasconstructionmaterialsforautomobilesandappliances,expoxyresinsasadhesives ,andpolyamideforvariousapplications.Inaddition ,phenolsareoftenfoundinwas… 相似文献
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A synthetic wastewater containing phenol as sole substrate was treated in a 2.8 L upflow anaerobic sludge blanket(UASB) reactor at ambient temperature. The operation conditions and phenol removal efficiency were discussed, microbial population in the UASB sludge was identified based on DNA cloning, and pathway of anaerobic phenol degradation was proposed. Phenol in wastewater was degraded in an UASB reactor at loading rate up to 18 gCOD/(L·d), With a 1:1 recycle ratio, at 26(1℃, pH 7.0-7.5. An UASB reactor was able to remove 99% of phenol up to 1226 mg/L in wastewater with 24 h of hydraulic retention time(HRT). For HRT below 24 h, phenol degradation efficiency decreased with HRT, from 95.4% at 16 h to 93.8% at 12 h. It further deteriorated to 88.5% when HRT reached 8 h. When the concentration of influent phenol of the reactor was 1260 mg/L(corresponding COD 3000 mg/L), with the HRT decreasing(from 40 h to 4 h, corresponding COD loading increasing), the biomass yields tended to increase from 0.265 to 3.08 g/(L·d). While at 12 h of HRT, the biomass yield was lower. When HRT was 12 h, the methane yield was 0.308 L/(gCOD removed), which was the highest. Throughout the study, phenol was the sole organic substrate. The effluent contained only residual phenol without any detectable intermediates, such as benzoate, 4-hydrobenzoate or volatile fatty acids(VFAs). Based on DNA cloning analysis, the sludge was composed of five groups of microorganisms. Desulfotomaculum and Clostridium were likely responsible for the conversion of phenol to benzoate, which was further degraded by Syntrophus to acetate and H2/CO2. Methanogens lastly converted acetate and H2/CO2 to methane. The role of epsilon-Proteobacteria was, however, unsure. 相似文献