气浮—水解酸化—IC—曝气—混合反应—砂滤工艺处理造纸制浆废水

采用气浮—水解酸化—IC—曝气—混合反应—砂滤组合工艺处理造纸、制浆生产废水,运行结果表明,当造纸废水水量12 000 m3/d、CODCr≤1 670 mg/L、BOD5≤750 mg/L、SS≤1 200mg/L,制浆废水水量6 000 m3/d、CODCr≤14 500 mg/L、BOD5≤5 100 mg/L、SS≤3 430 mg/L时,处理出水CODCr≤90 mg/L、BOD5≤30 mg/L、SS≤30 mg/L,可满足《制浆造纸工业水污染物排放标准》(GB 3544—2008)要求。     

高浓度化工废水治理工程实例

采用Fe -C和催化氧化预处理 +A/O生化处理工艺处理浙江丽水地区某化工厂废水。设计总处理水量 15 0 0m3/d ,其中浓废水 16 0m3/d ;设计进水水质 :高浓度有机废水COD 4 5万mg/L ,BOD 6 6 0mg/L ,pH 1～ 2 ,其他废水COD 36 0mg/L ,BOD 12 0mg/L ,pH 6～ 7;设计出水水质 :COD≤ 10 0mg/L ,BOD≤ 2 0mg/L ,pH 6～ 9,处理后出水可达标排放     

强化微电解-水解酸化-SBR处理造纸废水的效果

研究采用混凝、强化微电解、水解酸化和SBR组合技术处理造纸废水的效果。结果表明,废水经混凝处理、H_2O_2/MnO_2/微电解处理后,废水COD、SS、NH3-N、TP、BOD的去除率分别为88.23%、98.47%、86.78%、98.68%和82.56%,废水的可生化性由0.32提高到0.42;经水解酸化和SBR处理后,出水中COD平均质量浓度为85 mg/L,SS质量浓度为0 mg/L,NH3-N平均质量浓度为1.42 mg/L,TP平均质量浓度为0.1 mg/L,BOD平均质量浓度为30 mg/L。工程连续运行15d,进水中COD平均质量浓度为5 865 mg/L,出水中COD平均质量浓度为85 mg/L,COD总去除率为98.55%,出水达到废水一级排放要求。     

UASB-水解酸化-接触氧化-MBR工艺处理高浓度聚酯废水

某化纤厂产生的聚酯废水CODCr 3万～6万mg/L,pH 3～5,无色透明且有刺激性气味,生化性较差,BOD/COD为0.27,废水排放总量为150 m3/d.采用UASB-水解酸化-接触氧化-MBR工艺,取得了较好的效果.最终出水CODCr在100 mg/L以下,BOD5在30 mg/L以下,SS在30 mg/L以下,各项指标都达到了<污水综合排放标准>(GB 8978-1996)的一级标准.     

气浮—水解酸化—接触氧化—混凝气浮—过滤工艺处理屠宰废水

介绍了采用气浮—水解酸化—接触氧化—混凝气浮—过滤工艺处理长春市某食品公司的屠宰废水,分析了启动调试过程所需注意的问题及工艺运行效果。运行结果表明:当进水COD、BOD5、SS、NH3—N、动植物油平均分别为1 457mg/L、842mg/L、907mg/L、87.2mg/L、34.3mg/L时,出水平均分别为43.3mg/L、14.4mg/L、23.3mg/L、11.1mg/L、10.3mg/L,均可达到《污水综合排放标准》(GB 8978—1996)一级排放标准,该处理工艺运行成本为0.97元/m3,适用于屠宰废水处理工程。     

UASB—曝气吹脱—混凝—五段Bardenpho组合工艺处理养猪废水工程案例

某养猪厂废水处理工程采用UASB—曝气吹脱—混凝—五段Bardenpho主体工艺,通过物化、生化相结合的技术实现对养猪废水污染物的分段处理。在处理量为450 m3/d,进水COD、BOD5、氨氮、TN、SS、TP浓度分别为9 900 mg/L、4 000 mg/L、288.03 mg/L、671.54 mg/L、1 875mg/L、37.2mg/L时,系统相应指标的去除率均达到了90%以上,出水浓度分别为95mg/L、17mg/L、23.23mg/L、46.06mg/L、48mg/L、1.8mg/L,且远低于《畜禽养殖业污染物排放标准》(二次征求意见稿代替GB 18596-2001)中规定的标准。本工程总运行直接费用为2.70元/m3。     

破乳沉淀—生物选择器—Fenton氧化工艺在醋酸乳液废水处理中的应用

介绍了采用破乳沉淀—生物选择器—Fenton氧化组合工艺处理醋酸乳液废水的工程应用,实践表明,对进水COD达25 000mg/L,B/C小于0.15的醋酸乳液废水,破乳沉淀可去除75%左右的COD,出水经生物选择器—曝气池后可进一步将COD降到400～500mg/L,生化出水再经Fenton氧化可使COD降至100mg/L以下,去除率大于90%,该工艺还可有效防止污泥膨胀的产生。     

保险粉冷凝液废水处理工程设计

保险粉冷凝液废水有机物浓度高,可生化性较差,属于难处理化工废水.设计采用IC厌氧+脱硫+AO+气浮+Fenton+好氧MBR工艺处理保险粉废水,可处理水量为150 m3/d.工程实际运行结果表明,出水中COD、NH3-N的平均浓度分别为151 mg/L和11 mg/L,平均去除率分别达到98.9％和88.8％.出水水质...     

预处理—水解酸化—UASB—接触氧化工艺处理高浓度制药废水中试研究

针对四川某生物制药有限公司废水成分复杂、有机物和氨氮含量高的特点,以小试研究结果为指导,采用预处理—水解酸化—UASB—接触氧化工艺对废水进行了中试研究。运行结果表明,当系统进水量为0.7m3/d,进水COD和氨氮平均浓度分别为78 206mg/L和723.8mg/L,出水COD和氨氮平均浓度分别为187mg/L和6.24mg/L,去除率超过了99%。出水COD达到了《污水综合排放标准》(GB 8978—1996)二级标准。     

水解酸化-SBR-接触氧化法处理制药废水

采用水解酸化-SBR-接触氧化工艺处理制药厂生产过程中产生的丁提废水和虫草废水,处理水量2000 m3/d,进水CODCr约4000 mg/L.监测结果表明,处理后BOD5、CODCr和SS的去除率分别为98.5%、93%和80%,出水BOD5、CODCr和SS分别为28.3～30 mg/L、145.6～285.7mg/L和23.6～27.2 mg/L,出水各项指标符合<污水综合排放标准>(GB 8978-1996)二级标准.实际运行显示,该工艺处理效果稳定,耐冲击负荷性强.     

Pumped flow biofilm reactors (PFBR) for treating municipal wastewater

A novel laboratory bench-scale sequencing batch biofilm reactor (SBBR) system was developed for the treatment of synthetic domestic strength wastewater, comprising two side-by-side 18 l reactor tanks, each containing a plastic biofilm media module. Aerobic and anoxic conditions in the biofilms were effected by intermittent alternate pumping of wastewater between the two reactors. With a media surface area loading rate of 4.2 g chemical oxygen demand (COD)/m2.d, the average influent COD, total nitrogen (TN) and ammonium-nitrogen (NH4-N) concentrations of 1021 mg/l, 97 mg/l and 54 mg/l, respectively, reduced to average effluent concentrations of 72 mg COD/l, 17.8 mg TN/l, and 5.5 mg NH4-N /l. Using a similar alternating biofilm exposure arrangement, a 16 person equivalent pilot (PE) plant was constructed at a local village treatment works to remove organic carbon from highly variable settled municipal wastewater and comprised two reactors, one positioned above the other, each containing a module of cross-flow plastic media with a surface area of 100 m2. Two different pumping sequences (PS) in the aerobic phase were examined where the average influent COD concentrations were 220 and 237 mg/l for PS1 and PS2, respectively, and the final average effluent COD was consistently less than 125 mg/l--the European Urban Wastewater Treatment Directive limit--with the best performance occurring in PS1. Nitrification was evident during both PS1 and PS2 studies. A 300 PE package treatment plant was designed based on the bench-scale and pilot-scale studies, located at a local wastewater treatment works and treated municipal influent with average COD, suspended solids (SS) and TN concentrations of 295, 183 and 15 mg/l, respectively resulting in average effluent concentrations of 67 mg COD/l, 17 mg SS/l and 9 mg TN/l. The SBBR systems performed well, and were simple to construct and operate.     

化学除磷-水解酸化-厌氧接触-接触氧化工艺处理榨菜废水

榨菜废水的高含盐量和高氮磷对微生物有较强的抑制作用,处理难度大.以处理规模400 m3/d的重庆某榨菜厂废水处理工程为例,其进水COD 3 000～4 000 mg/L,BOD5 1445 mg/L,盐度1.5％～2.5％(以NaCl计),氨氮80～120 mg/L,总磷25～30 mg/L.通过驯化耐盐微生物为主体菌种,采用化学除磷-水解酸化-厌氧接触-接触氧化工艺进行处理,出水COD、BOD5、氨氮、总磷以及盐度平均分别为70.5 mg/L、14.9 mg/L、9.4 mg/L、0.46 mg/L以及1.53％,可以达到《污水综合排放标准》(GB8978-1996)一级标准.     

混凝沉淀—IC工艺预处理高浓度OE生产废水

脂肪酸聚氧乙烯酯(OE)生产过程中产生高浓度有机废水,用混凝沉淀—IC反应器预处理高浓度OE生产废水,当进水CODCr为6 000～9 000 mg/L、SS为800～1 500 mg/L时,出水平均CODCr、SS分别为780 mg/L、200 mg/L,CODCr、SS的平均去除率达到90%和85%,出水水质达到厂方的预处理要求,为后续主体工艺处理提供保障。     

UASB与ABR工艺处理印染废水中试实验研究

对上流式厌氧反应器(UASB)和折流式厌氧反应器(ABR)处理难降解印染废水进行中试研究。结果表明:在厌氧反应器最佳水力停留时间为24 h条件下,UASB和ABR稳定运行2个多月,在进水COD质量浓度波动较大的情况下(ρmax=1 020.0 mg/L,ρmin=593.6 mg/L,ρ均=755.4 mg/L),UASB和ABR出水平均COD质量浓度分别为409.3 mg/L和420.9 mg/L,平均去除率分别为45.5%和43.9%。两种厌氧反应器对色度去除效果较佳,进水平均色度342倍,出水平均色度分别78倍和80倍,平均去除率分别为77.2%和76.6%。印染废水B/C由0.29分别提高到0.46和0.43,废水可生化性明显改善,UASB较ABR效果好。     

Performance of an ultra-compact biofilm reactor treating domestic and synthetic wastewaters

The performance of an ultra-compact biofilm reactor (UCBR) treating domestic wastewater (DWW) collected from a local water reclamation plant; and gradually shifting to a mono-type carbon source synthetic wastewater (SWW) combined with DDW (CWW) and finally SWW; was investigated in this study. The total COD concentrations of influent DWW and CWW/SWW were 413.6 ± 80.8 mg/L and 454.9 ± 51.3 mg/L, respectively. The UCBR was able to achieve average total COD removal efficiencies of 70 ± 10% and 80 ± 4% for DWW and SWW respectively. The total COD concentrations of the effluent of DWW and CWW/SWW were 122.5 ± 44.4 mg/L and 89.7 ± 10.3 mg/L, respectively. These observations suggested that heterotrophs in the UCBR system were able to better assimilate and remove carbon of mono-type SWW compared to diverse carbon sources such as DWW; although the influent soluble COD concentrations of the SWW were higher than those of the DWW. However, the effluent NH(4)(+)-N concentrations for both types of wastewater were rather similar, <3.0 mg/L; although the influent NH(4)(+)-N concentrations of the DWW were 1.5 times those of the SWW.     

曝气生物滤池去除有机物及氨氮的影响因素分析

采用以陶粒为填料的曝气生物滤池(BAF)处理生活污水,研究气水比、水力负荷、进水COD和NH3-N负荷对BAF去除COD及NH3-N的影响,分析COD及NH3-N沿滤柱的变化规律。结果表明:当试验进水COD及NH3-N质量浓度分别为300~370mg/L和20~40mg/L时,最佳气水比为4∶1~5∶1,最佳水力负荷为1.0~2.0 m3/(m2.h)。当进水COD负荷为1.69~6.47 kg/(m3.d)时,COD去除率与进水COD负荷成正相关。BAF的硝化性能与进水NH3-N和COD负荷成负相关。     

香兰素废水处理技术研究及工艺设计

采用预处理-加压曝气生物氧化工艺处理香兰素生产废水。反应器在200 kPa压力条件下,COD容积负荷率达5.5~8.0 kg/m3.d,进水COD质量浓度为2 000~2 500 mg/L,反应时间为8~10 h时,处理后的出水COD质量浓度小于100 mg/L,达到污水综合排放一级标准。还对加压曝气生物反应器原理、工艺流程、运行参数、工艺设计等方面进行了介绍。     

On-site treatment of a motorway service area wastewater using a package sequencing batch reactor (SBR).

A sequencing batch reactor (SBR) treating the effluent of a motorway service station in the south of England situated on a major tourist route was investigated. Wastewater from the kitchens, toilets and washrooms facilities was collected from the areas on each side of the motorway for treatment on-site. The SBR was designed for a population equivalent (p.e.) of 500, assuming an average flow of 100 m3/d, influent biochemical oxygen demand (BOD) of 300 mg/l, and influent suspended solids (SS) of 300 mg/l. Influent monitoring over 8 weeks revealed that the average flow was only 65 m3/d and the average influent BOD and SS were 480 mg/l and 473 mg/l respectively. This corresponded to a high sludge loading rate (F:M) of 0.42 d(-1) which accounted for poor performance. Therefore the cycle times were extended from 6 h to 7 h and effluent BOD improved from 79 to 27 mg/l.     

The feasibility study of using non-woven MBR for reduction of hydrolysed biosolids.

In this study, non-woven MBR was used to treat hydrolysed biosolids wasted from a biological treatment plant. The concentration of SS of hydrolysed biosolids in influent was 10,000 mg/L and the concentration of SS in effluent was less than 200 mg/L with/without discharging wasted sludge depending on different HRTs, i.e. 20, 15 and 10 d. The results indicated that the percentage of biosolids reduction in terms of SS removal efficiency in non-woven MBR was around 65, 60 and 35%, respectively, depending on different HRTs. Meanwhile, the ratio of VSS/SS was decreased from 0.78 to 0.50 and the number of smaller inorganic particle sizes increased due to extended SRT. The initial flux in the non-woven MBR was set at 0.02, 0.04 and 0.06 m3/m2/day and trans-membrane pressure (TMP) was less than 10 kPa. The permeate flux could be maintained quite stably due to lower TMP. The proposed non-woven MBR could be used to achieve the reduction of biosolids in the wastewater treatment plant.     

臭氧-非均相Fenton工艺在焦化废水处理中的应用研究

通过对江苏沙钢集团厂区现有的焦化废水处理工艺进行深入的调研后,合理优化现有处理单元,采用增加前处理以及末端深度处理环节的方式,达到提高污染去除效率的目的。通过现场中试实验,获取改良工艺对焦化废水去除效果的最优工况参数。中试实验的工艺路线为“破乳→隔油→臭氧催化Fenton→气浮→EGSB→BACT→臭氧催化Fenton→气浮”,在前处理段臭氧浓度设置为100mg/L、深度处理单元臭氧浓度设置为50mg/L、BACT段分流比为1∶1、污泥回流比为1∶1时,工艺运行稳定后,在COD进水浓度为4100~5600mg/L时,系统对COD去除率可稳定达到95%以上,在氨氮进水浓度为250~310mg/L时,系统对氨氮去除率可稳定达到91%以上。