UASB-接触氧化工艺在啤酒废水处理中的应用

啤酒废水的主要特点之一是BOD/COD高,利于生化处理,N、P含量较少,SS高.徐州某啤酒厂产生的啤酒废水采用UASB-接触氧化工艺处理,取得了较好的效果.出水CODcr75～80mg/L,BOD515～20mg/L,SS65～70mg/L,各项指标都达到了《啤酒工业水污染排放标准》（GB19821-2005）的排放标准.     

高硫酸盐抗生素废水生物处理

采用0.6m3/d的酸相up-flow anaerobic sludge blanket（UASB）-气提脱硫-甲烷相UASB-se-quencing batch reactor（SBR）工艺处理高硫酸盐抗生素废水,硫酸盐还原与有机物甲烷化分别在两个反应器中进行,有效避免了硫酸盐还原菌对产甲烷菌的竞争抑制,利用空气吹脱将硫酸盐还原产物硫化物降低到一定浓度,消除了硫化物对后续单元产甲烷菌的毒害作用.80 d试验结果表明,当系统稳定运行时,进水CODCr为10 680～14 140 mg/L,SO42-为1 280～1 610 mg/L时,系统出水CODCr为760～1 020 mg/L,CODCr平均去除率为92.8%,SO42-为160～210 mg/L,平均去除率为87.7%,硫化物浓度在1.8～2.9 mg/L,平均去除率在97.1%.该系统可大大削减进水中的有机物、SO42-及反应过程中的硫化物,该系统作为高硫酸盐抗生素废水处理预处理工艺是可行的.     

上流式厌氧污泥床反应器的腐蚀与防护

由于上流式氧污泥床（UASB）内发生的反应主要属于化学过程的生物过程,因此UASB反应器内壁极易发生腐蚀,从而影响反应效果,降低设备使用寿命,增加维护费用。在分析上流式厌氧污泥床反应器的结构与工艺对腐蚀的作用的基础上,讨论了腐蚀机理,提出了应在改进防腐设计、采用耐腐蚀和对设备进行防腐处理等3个方面采取措施,从而防止UASB反应器内的腐蚀现象。     

常州某垃圾渗滤液处理工程实例

根据垃圾渗滤液有机污染物和含氮化合物浓度高的特点,采用“UASB＋A／O＋膜过滤”改进工艺处理垃圾渗滤液,结果表踢,该处理工艺的处理效果稳定,UASB对COD的去除率达70％以上,A／O系统对氨氮的去除率达99％,膜过滤出水水质稳定达标,生化系统污泥产量低。出水水质满足《生活垃圾填埋场污染控制标准》（GBl6889--2008）中“表2”要求。     

高浓度油脂废水UASB工艺处理研究

分析了油脂废水的特点，并针对这些特点选择厌氧UASB工艺作为主体工艺进行试验，得出了令人满意的结果；试验表明，在预处理得当的情况下，使用UASB工艺处理油脂废水可以达到85％以上的COD去除率，而且能耗较其他工艺大大降低，是一种节能高效的处理方法。     

Kinetics of municipal sewage degradation in EGSB and UASB reactors at 10 ℃

Kinetics of municipal sewage degradation in Expanded Granular Sludge Bed （EGSB） and Up-flow Anaerobic Sludge Blanket （UASB） reactors at 10℃ were investigated via continuous experimental equipments. The results indicated that the whole reaction process can be simulated by the first-order dynamic equation model. Dynamic parameters such as k, Vmax and Ks of UASB in hydrolysis acidification stage were 1.08 d^-1 , 2.8 d^-1 and 372 mg/L comparing to those of 1.18 d^-1 , 3.5 d^-1 and 112 mg/L in the methanogenesis stage respectively. The EGSB＇s k, Vmax and Ks were 2.91 d^-1 , 14.3 d^-1 and 470 mg/L in the hydrolysis acidification stage comparing to those of 1.68 d^-1, 6.6 d^-1 and 103 mg/L in the methanogenesis stage respectively. Comparison of k values of the two stages in UASB and EGSB indicates that hydrolysis acidification stage is the controlling step for the whole reaction process of UASB, while methanogenesis stage is the controlling step in EGSB. Compared with UASB, municipal sewage treatment by EGSB at 10 ℃ can reach the same effluent requirement with lower retention time due to its effluent recirculation.     

常温下间甲酚的厌氧降解研究

采用常温(26～30°C)上流式厌氧污泥床(UASB)反应器处理间甲酚废水,研究常温下颗粒污泥厌氧降解间甲酚的能力,UASB反应器降解间甲酚的极限浓度以及产气量的变化,探讨了采用UASB厌氧处理间甲酚废水的主要影响因素.试验结果证明,当HRT为18h时,UASB反应器可以降解的间甲酚浓度高达900mg/L(2250 m...     

高温条件下UASB反应器对苯酚的降解研究

采用高温上流式厌氧污泥床(UASB)反应器降解苯酚废水,研究利用中温颗粒污泥启动高温UASB反应器的可行性,研究UASB反应器降解苯酚的极限浓度。试验结果证明,当HRT为20小时时,UASB反应器可以降解的苯酚浓度高达5500mgCOD/L,容积负荷为6.6gCOD/(L.d),苯酚去除率达到90.3%。     

Kinetics of municipal sewage degradation in EGSB and UASB reactors at 10℃

Kinetics of municipal sewage degradation in Expanded Granular Sludge Bed (EGSB) and Up-flow Anaerobic Sludge Blanket (UASB) reactors at 10℃ were investigated via continuous experimental equipments. The results indicated that the whole reaction process can be simulated by the first-order dynamic equation model. Dynamic parameters such as k, Vmax and Ks of UASB in hydrolysis acidification stage were 1.08 d-1, 2.8 d-1 and 372 mg/L comparing to those of 1.18 d-1, 3.5 d-1 and 112 mg/L in the methanogenesis stage respectively. The EGSB's k, Vmax and Ks were 2.91 d-1, 14.3 d-1 and 470 mg/L in the hydrolysis acidification stage comparing to those of 1.68 d-1, 6.6 d-1 and 103 mg/L in the methanogenesis stage respectively. Comparison of k values of the two stages in UASB and EGSB indicates that hydrolysis acidification stage is the controlling step for the whole reaction process of UASB, while methanogenesis stage is the controlling step in EGSB. Compared with UASB, municipal sewage treatment by EGSB at 10 ℃ can reach the same effluent requirement with lower retention time due to its effluent recirculation.     

STUDY ON MAXIMUM SPECIFIC SLUDGE ACTIVITY OF DIFFERENT ANAEROBIC GRANULAR SLUDGE BY BATCH TESTS

IntroductionGranular sludge UASB (Up- flow AnaerobicSludge Bed) reactor is the most widely used anaer-obic waste water treatmentreactor in the world.Itbelongs to the second generation of modern anaero-bic reactor. EGSB(Expanded Granular SludgeBed) reactor is an even higher efficient anaerobicwastewater treatment reactor,which is developedin the past ten years based on the UASB technolo-gy.It belongs to the third generation of modernanaerobic reactor. EGSB includes two kinds oftypes:I…