UASB/活性污泥/接触氧化/微滤工艺处理甘油废水

某精细化工生产企业精制甘油废水具有COD浓度高、色度高、可生化性较好等特点,针对其水质特性,采用UASB/活性污泥/接触氧化/微滤工艺进行处理。工程实践表明,该工艺具有对有机物去除率高、耐冲击性强、运行简单等特点,出水水质稳定达到《污水综合排放标准》(GB 8978—1996)一级标准。     

改良UASB/生物接触氧化/化学氧化工艺处理制药废水

采用IC反应器/改良UASB/两级生物接触氧化/芬顿氧化法处理混合罐装类药品生产废水。调节池以IC反应器的方式运行;加大UASB反应器内的上升水流,使UASB反应器以EGSB工艺的方式运行,而不改变UASB反应器三相分离器的结构;两级生物接触氧化池出水中有机物在芬顿试剂氧化作用下进一步降解。在废水水质、水量变化较大的情况下,该工艺能稳定地将难生化降解废水处理达到《混装制剂类制药工业水污染物排放标准》(GB 21908—2008)。     

微电解/UASB/接触氧化法处理高浓度日用化工废水

介绍了微电解／UASB／接触氧化法处理高浓度日用化工废水的工程设计、调试及运行情况，经处理后出水各项指标优于广东省《水污染物排放限值》（DB44／26-2001）的一级标准（第二时段），且系统运行稳定、处理效果好、运行费用低。     

ABR水解/生物接触氧化处理印染废水

采用厌氧折流板反应器（ABR）水解／生物接触氧化法处理印染废水，在ABR的HRT为12h的条件下测定了ABR各格室及生物接触氧化池出水的色度、COD。结果表明，ABR出水色度达到了纺织染整行业一级排放标准，最终出水COD达到了行业二级排放标准。     

高浓度石化废水综合处理工程

采用气浮/铁炭曝气/芬顿氧化/UASB/生物接触氧化工艺处理高浓度石化废水,介绍了系统的启动与运行情况.工程实践表明,该组合工艺对COD、色度等均有较好的去除效果,处理后出水水质达到<污水综合排放标准>(GB 8978-1996)的一级标准.     

气浮-生物接触氧化法处理乳品加工废水

介绍了应用气浮—生物接触氧化工艺处理乳品加工废水的工程实例。运行表明，气浮可有效去除非溶解性蛋白质、脂肪等大分子有机物，为后续的好氧处理创造了一个良好的环境；生物接触氧化工艺能稳定高效地去除COD、BOD5，出水水质达到了国家一级排放标准。     

混凝气浮/UASB/接触氧化/混凝沉淀处理油脂废水

江西某油脂有限公司的生产废水和冲洗废水采用混凝气浮/UASB/生物接触氧化/混凝沉淀组合工艺处理。采用隔油+混凝气浮进行预处理,油脂去除率高且稳定;以UASB和生物接触氧化为主体工艺,污泥浓度高,处理效果好。稳定运行后,出水COD为89 mg/L,BOD_5为19mg/L,SS为69 mg/L,动植物油为10 mg/L,均达到《污水综合排放标准》(GB 8978—1996)的一级标准。     

UASB/Orbal氧化沟工艺处理垃圾渗滤液

采用UASB/吹脱塔/Orbal氧化沟（投加粉末活性炭）处理垃圾渗滤液,对COD去除率高,脱氮效果明显.一年多的运行实践表明,处理出水水质稳定,各项指标均达到国家排放标准.     

预处理/UBF/接触氧化/BAF处理抗生素制药废水

针对化学合成抗生素制药废水成分复杂、有机物和含盐量高的特点,先进行共沸蒸馏／二效逆流蒸发物化预处理,而后采用UBF／接触氧化／BAF工艺处理。工程实践表明,物化预处理可有效降低废水中有机物和盐分的含量,有利于后续生化处理;系统调试3个月后,在进水COD为7003～11087mg／L的情况下,缓慢增加UBF、接触氧化塔、BAF的容积负荷,对COD的平均去除率分别达到88．82％、50．09％和40．91％,出水COD〈300mg／L,达到《污水综合排放标准》（GB8978-1996）的二级标准。     

UASB反应器—接触氧化法处理淀粉废水

采用“厌氧 好氧”处理工艺对淀粉生产废水进行处理，其中厌氧工艺采用先进的UASB反应器技术，好氧工艺采用接触氧化法，本流程具有COD去除率高、运行稳定、管理方便、剩余污泥量少等优点。实践证明该工艺可以有效的处理高浓度的有机废水。     

UASB/曝气沉淀/IC反应器处理高浓度硫酸盐有机废水

在赤霉素生产过程中产生的高浓度硫酸盐有机废水,处理难度较大。采用UASB／曝气沉影IC反应器工艺处理该废水,UASB中的硫酸盐还原菌将硫酸根还原为硫化物,曝气池中的脱硫杆菌则将硫化物氧化为单质硫,并在沉淀池中去除,IC反应器去除COD。系统稳定运行后,对硫酸盐的去除率〉90％,对COD的去除率〉80％。     

Effect of process configuration and substrate complexity on the performance of anaerobic processes

The roles of substrate complexity (molecular size of the substrate) and process configuration in anaerobic wastewater treatment were investigated to determine optimal methanogenic technology parameters. Five substrates (glucose, propionate, butyrate, ethanol, and lactate) plus a mixed waste (60% carbohydrate, 34% protein, and 6% lipids) were studied under five reactor configurations: batch-fed single-stage continuous stirred tank reactor (CSTR), continuously fed single-stage CSTR, two-phase CSTR, two-stage CSTR, and single-stage upflow anaerobic sludge blanket (UASB). The substrate feed concentration was 20,000 mg/L as COD. The solids retention time (SRT) and hydraulic retention time (HRT) in the CSTR reactors were 20 d, while HRT in the UASB was 2 d. All reactors were operated for at least 60 d (equal to 3SRT). Substrate complexity was observed to be less significant under two-phase, two-stage and UASB reactor configurations. Two-phase CSTR, two-stage CSTR, and single-stage UASB configurations yielded the lowest effluent chemical oxygen demands (130-550, 60-700, and 50-250 mg/L, respectively). The highest effluent chemical oxygen demands were detected when feeding glucose, propionate, and lactate to continuously fed single-stage CSTRs (10, 400, 9900, and 4700 mg/L COD, respectively) and to batch-fed single-stage CSTRs (11, 200, 2500, and 2700 mg/L COD, respectively). Ironically, the one stage CSTR--most commonly utilized in the field--was the worst possible reactor configuration.     

Post‐treatment of up‐flow anaerobic sludge blanket reactor effluents in activated sludge process‐based system for anionic surfactants

This paper presents the performance of two full‐scale up‐flow anaerobic sludge blanket–activated sludge process (UASB‐ASP)‐based sewage treatment plants (STPs) (surface and diffused aeration‐based activated sludge processes as post‐treatment units). Performance of this combination is compared with UASB–polishing ponds and UASB–ozonation‐based STPs. Post‐treatment units removed 89 and 92% of anionic surfactants (AS) by surface and diffused aeration, respectively. Finally, 0.61 and 0.23 mg/L of AS were discharged from post‐treatment steps after overall reduction of 90–92%. Final concentrations from UASB‐ASP‐based STPs were low compared with UASB–polishing ponds (3.60–4.91 mg/L) and UASB–ozonation (1.52 and 0.53 mg/L). Overall, UASB‐ASP‐based STPs were working efficiently for the removal of organics in terms of chemical oxygen demand (COD) (84%) and biochemical oxygen demand (BOD) (93%), but they need further modifications for the removal of AS up to the level of risk quotient [risk quotient (RQ)] ≤ 1 for no risk to aquatic environment.     

Anaerobic digestion of tannery soak liquor with an aerobic post-treatment

The leather industry occupies a place of prominence in the Indian economy due to its massive potential for employment, growth and exports. The potential environmental impact of tanning is significant. This study focuses on tannery soak liquor, generated by the soaking of hides and skins, which is characterised by high organic load and high salinity. For these reasons, the soak liquor should be segregated and pre-treated separately before being mixed with the composite wastewater, made of all other streams mixed together. The anaerobic digestion of tannery soak liquor was studied using a UASB. COD removal reached 78% at an OLR of 0.5 kg COD m(-3) d(-1), a HRT of 5 days and a TDS concentration of 71 gl(-1). The combination of the UASB with an aerobic post-treatment enhanced the performance of the overall wastewater treatment process and the COD removal efficiency of the combined anaerobic/aerobic treatment system reached 96%. However, for effective operation, the system had to be operated at very low OLRs, which affects the economic viability of such a process.     

UASB/MBR组合工艺处理抗生素废水的研究

采用UASB/MBR组合工艺处理抗生素废水,考察了其处理效果及影响因素.结果表明,当UASB的水力停留时间(HRT)为13 h、MBR的HRT为7.5 h时,系统对COD的去除效果最好,在进水COD为1 000～9 000 mg/L的条件下,出水COD可降至199 mg/L,对COD的总去除率可达80%以上.     

UASB/SBR工艺处理燃料乙醇生产废水工程设计

对燃料乙醇生产废水进行了分质处理,对高浓度废水采用UASB/SBR工艺处理,对于低浓度废水则在其水质满足设计值时,经格栅处理后直接进入预曝池进行好氧处理即可,当其水质高于设计值时则经格栅处理后与高浓度废水一并处理.运行结果表明,在实际进水浓度高于设计值的情况下,出水水质达到了<污水综合排放标准>(GB 8978-1996)的一级标准,表明工艺设计合理,处理效果良好.     

UASB处理低浓度城市污水的生产性研究

广东某城市污水处理厂采用UASB-好氧工艺处理低浓度城市污水，对UASB的实际处理效能进行了考察。结果表明，在试验的进水水质条件下，当UASB的水力停留时间为6h时，系统对COD和BOD5的平均去除率分别为50％和60％，对TP的去除率为15％～38％。当HRT由5．67h延长至10h时，出水VFA浓度会随之降低，而pH值则始终稳定在6．5～7．5，系统对COD和BOD5的去除率分别增加9％和19％，对溶解性COD和BOD5的去除率分别增加25％和24％。     

多段活性污泥法处理高浓度中药废水

采用多段活性污泥法处理高浓度中药废水。运行结果表明，尽管进水有机物浓度很高，但该工艺运行稳定，对COD和BOD，的去除率均超过99％，出水水质达到《污水综合排放标准》（GB8978-1996）的一级标准。     

PACT/WAR系统在龟山工业区污水处理厂中的应用

介绍了粉末活性炭/湿式氧化再生(PACT/WAR)系统在台湾龟山污水处理厂中的应用,探讨了PACT/WAR系统对有机物、重金属离子以及色度的去除效果,并对重要操作参数进行了评估.该系统的平均COD去除率为77%、BeD,去除率为84%、SS去除率为71%、色度去除率为94%.运行结果显示,曝气池活性炭浓度为500～1 000 mg/L时,其单位有机物去除量约0.2～0.6 g/g;系统污泥龄为4～10 d,污泥龄越长则COD、BOD,去除率越高,出水BOD/COD值约为0.03～0.16;水力停留时间越长则COD去除率越高,而对BOD5去除率的影响则不太显著.     

制药废水处理工艺的改造

某制药厂由于新上生产项目,使综合废水中有机污染物和硫酸盐浓度大幅升高,所以必须对原处理工艺进行改造.改造工艺主要采用UASB反应器、SBR反应器及深层曝气池,其中UASB反应器采用两相(产酸及硫酸盐还原相、产甲烷相)厌氧技术以减少硫酸盐对厌氧过程的影响.经改造后,出水水质达到<污水综合排放标准>(GB 8978-1996)的一级标准.