新型絮凝剂COF强化处理印染废水的试验研究

为解决广东某印染厂生产废水处理不达标的问题,采用具有催化氧化耦合作用的絮凝剂COF对生化出水进行强化处理试验研究.结果表明,当COF投量为120m9/L、沉淀时间为90min时,絮凝强化处理工艺对COD、色度、SS的平均去除率分别为70%、90%和85%,出水水质达到<污水综合排放标准>(GB 8978-1996)的一级排放标准.     

电解法制备PAC在水处理中的应用研究

通过电解法制备了一种AIb含量达67．6％、碱化度达65．5％的优质聚合氧化铝（E－PAC）产品,并将其用于水处理试验。静态试验和现场中试的研究结果表明,与普通PAC和几种传统混凝剂比较,E－PAC对水中的浊度和腐殖质、污水中的SS和COD及油类污染物等具有优异的去除效能,投加10mg/LE-PAC(以AI2O3计）,可去以去除污水中99．1％的SS和57．6％的COD,明显高于同类产品的水处理效率。     

采石场生产废水的处理与回用

沙县采石场生产废水含有高浓度的SS和较低浓度的COD,经实验室模拟试验确定采用沉砂-混合-反应-沉淀工艺,介绍了该工艺的设计特点及参数。运行结果表明,出水ss平均浓度仅为3．7mg／L,对其去除率高达99．9％;出水COD平均浓度为12．5mg／L,对其去除率为91．6％;处理出水达到《污水综合排放标准》（GB8978-1996）的一级排放标准,达标尾水可作为生产用水循环再利用。     

MEMBRANE BIOREACTORS AND CONSTRUCTED WETLANDS FOR TREATMENT OF RENDERING PLANT WASTEWATER

The performance of a novel industrial membrane bioreactor (MBR) comprising denitrification, nitrification and ultrafiltration for the secondary treatment of primary treated animal rendering wastewater has been compared with an experimental, low-cost and novel vertical-flow constructed wetland planted with Typha latifolia L. (Reedmace or Broad-leaved Cattail). The process wastewater followed pre-treatment by dissolved air flotation (DAF). The mean DAF effluent gave highly variable chemical oxygen demand (COD) and ammonia concentrations of 5816 (standard deviation (SD): 3005.0) and 614 (SD: 268.7) mg/l, respectively. The mean MBR effluent for COD and ammonia was 37 and 86 mg/l, respectively. The mean treatment performance of the constructed wetland for COD, ammonia and suspended solids was 205, 67 and 57 mg/l, respectively.     

江苏省某工业园区污水处理厂设计及运行实例

针对江苏省某工业园区污水处理厂进水水质特点,采用混凝沉淀、水解酸化、A/O等组合工艺处理,介绍了工艺流程、主要构筑物设计参数、经济分析等。运行结果表明,出水水质稳定优于《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准,即COD≤50 mg/L、BOD5≤10 mg/L、TN≤15 mg/L、TP≤0. 5 mg/L、SS≤10 mg/L、NH_4^+-N≤8 mg/L,相应指标平均去除率分别达到93. 4%、97. 3%、84. 2%、94. 2%、97. 5%、88. 57%。     

保健药制药废水处理工程设计

针对保健药品制药废水浓度高、色度大的特点,采用水解酸化/生物接触氧化/混凝沉淀工艺进行处理,处理水量为 100 m3/d,进水COD约为1 200 mg/L、BOD5约为600 mg/L、SS约为600 mg/L、氨氮约为45 mg/L、色度为700倍.运行结果表明,出水COD、BOD5、SS、氨氮和色度分别为 82.0、18.2、32.0、12.0 mg/L和40倍,符合<污水综合排放标准>(GB 8978-1996)的一级标准.该工艺处理效果稳定,耐冲击负荷能力强,产泥量少.     

ABR-BAF工艺处理采油废水的中试研究

进行了利用折流板厌氧反应器（ABR）-曝气生物滤池（BAF）工艺处理江汉油田马-25污水处理站采油废水的中试研究，主要考察了ABR的除油效果、提高废水可生化性的作用以及BAF的运行参数、处理效果等。研究结果表明：当废水流量为0．3m^3／h时，ABR反应器对油的去除率平均为83．5％，对COD的去除率平均为40．8％，出水BOD，／COD值提高了24．8％。ABR一方面去除了采油废水中的大部分油，另一方面提高了采油废水的可生化性。当BAF的水力负荷为0．6m／h、进水COD平均为203．5mg／L时，出水COD平均为85．7mg／L，平均去除率为57．9％；对SS的去除率为82．7％。组合工艺对油、COD、BOD，和SS的总去除率分别为96．1％-96．9％、58．2％～75．1％、80．0％-93．1％和80．7％～87．1％。扫描电镜（SEM）观察结果显示：生物膜结构紧密，并且观察到裂口虫，生物相非常丰富。ABR-BAF工艺能够很好地处理采油废水，出水水质满足污水二级排放标准。     

CAST污水处理工艺在寒冷地区的应用

以绥化市城市污水处理工程为背景,介绍了CAST工艺在冬季运行期间对COD、BOD5、TP和SS的去除效率,并对影响去除效率的因素进行分析.结果表明,系统在整个冬季运行期间,平均出水COD、氨氮、TP和SS浓度分别为48.3、0.96、0.71和9.35mg/L,不仅可长期稳定地满足《城镇污水处理厂污染物排放标准》中的一...     

Color removal from cotton textile industry wastewater in an activated sludge system with various additives

The low biodegradability of many dyes and textile chemicals indicates that biological treatment is not always successful in the treatment of cotton textile wastewater, in terms of color removal. In this study, a specific organic flocculant (Marwichem DEC), powdered activated carbon (PAC), bentonite, activated clay and commercial synthetic inorganic clay (Macrosorb) were directly added into the activated sludge laboratory pilot plant model. Before dosage, the optimum sludge retention time and hydraulic retention time were determined as 30 days and 1.6 days, respectively. The Monod kinetic constants were determined as Y = 0.76 kg MLSS/kg COD, Kd = 0.026 l/day, K(S) = 113.3 mg/L, k = 0.42 l/day and mu(max) = 0.32 kg MLSS/kg COD day. Under these conditions the average COD removal was 94% and color removal was 36%. The addition of these materials did not change COD removal significantly. The most effective materials were found to be DEC and PAC for color removal. While the color removal efficiency for 120 mg/L DEC addition was 78%, it was 65% for 100 mg/L, 77% for 200 mg/L and 86% for 400 mg/L PAC addition. The advantage of DEC compared to PAC was the lower sludge production. Statistical analyses using multiple linear regression indicate that there is no relationship between the effluent color with the influent color and total suspended solids (TSS) for DEC and PAC addition. On the other hand, when only bentonite, activated clay and Macrosorb were added, the effluent color was primarily dependent on the influent color and the TSS concentration had little effect. When the data is examined by using Kruskal-Wallis H and Mann-Whitney U tests and it was found that there was a significant difference between the color data groups.     

EGSB/生物接触氧化/BAF工艺处理葡萄糖生产废水

采用“EGSB-生物接触氧化-BAF”联合工艺处理葡萄糖生产废水，着重研究了pH值和容积负荷对EGSB反应器去除效果的影响。结果表明，以厌氧颗粒污泥作为EGSB的接种污泥，30d左右便可完成启动，且能形成灰黑色和黑色颗粒污泥；采用出水回流和人为投加碱性物质可以增强系统的缓冲能力，有效缓解系统酸碱平衡失调。当进水COD为3000～4000mg／L、SS为800～1000mg,／L、NH3-N为15～20mg／L时，采用该联合工艺处理后，对COD、SS和NH3-N的平均去除率分别达98％、92％和78％，处理效果好而且稳定。     

膜生物反应器中膜的强化除污效果研究

采用A/O法膜生物反应器 (MBR)处理城市污水 ,以考察膜分离对MBR性能的影响。结果表明 ,MBR对COD、NH3-N、TN和悬浮物的平均去除率分别为 95 %、98%、83%和 98.5 % ,其中膜分离作用对COD、NH3-N、TN和悬浮物去除率的贡献分别为 10 %～ 2 0 %、5 .1%、7.7%和10 %～ 2 0 % ,强化了MBR的处理效果     

化学生物絮凝工艺处理低浓城市污水研究

考察了化学生物絮凝和化学混凝两工艺对低浓度城市污水的处理效果。试验表明，在PAC加入量为70mg／L、PAM加入量为0．5mg／L、絮凝反应时间为35min时，化学生物絮凝工艺对COD的平均去除率为61％，对TP的平均去除率为70％，对SS的平均去除率为90％，效果明显优于化学混凝工艺；在化学生物絮凝工艺中污泥回流不仅可以提高去除效果，而且对进水水质波动有一定的稳定作用。     

砂洗印染废水处理工程实例

采用水解酸化/三相生物流化床/生物接触氧化/混凝气浮工艺处理砂洗印染废水,实际运行结果表明,在进水平均COD为963 mg/L、BOD5为320 mg/L、SS为452 mg/L、色度为490倍的条件下,出水相应指标分别为89 mg/L、15 mg/L、50 mg/L、30倍,出水水质符合<纺织染整工业水污染物排放标准>(GB 4287-92)的一级标准.     

在化学生物絮凝工艺中对总磷实施自动控制的研究

化学生物絮凝工艺是以去除污水中的COD、SS和TP为目标的一级强化处理工艺。为保证其出水水质稳定，构建了该工艺的自动控制系统。它采用以进水TP浓度为基础的前馈控制和以出水TP浓度为控制参数的反馈控制，来实现对投药量的自动调节。试验结果表明，该自动控制系统对化学生物絮凝工艺的投药量具有很强的调节作用，可使投药量随进、出水TP浓度的变化进行实时调整；当出水TP浓度稳定在1mg／L以下时，自动控制的投药量比手动操作的节省约25％，从而降低了运行费用。与手动加药相比，该自动控制系统的推广可取得良好的经济效益。     

Cationic lignin polymers as flocculants for municipal wastewater

In this research, two lignin-[2-(methacryloyloxy)ethyl]trimethylammonium chloride (METAC) polymers were generated and assessed for their efficiency in treating municipally produced wastewater. The removals of chemical oxygen demand (COD) and turbidity were 47.5% and 71.2%, respectively, for the singular flocculation system at the dosage of 40–70 mg/L. For the dual coagulation/flocculation system, the polymer with a higher charge density (AM2) achieved higher COD and turbidity removals than the polymer with a lower charge density (AM1). To achieve the same organic removal from the wastewater, the alum use could be reduced from 150 mg/L in the single alum use to 35 mg/L in the dual system when used along with 65 mg/L of AM2. In both systems, lignin-METAC polymers exhibited better performance than the flocculant used at a local wastewater treatment plant. Lignin-METAC polymers could be used as bio-based flocculants for the replacement of petroleum-based flocculants and inorganic coagulants.     

微电解/炉灰渣吸附法处理印染废水

采用微电解/炉灰渣吸附法处理印染废水,工程应用结果表明,系统对COD、BOD5、SS、色度的去除率分别高于90%、80%、92%、96%,不仅具有良好的脱色效果,且能使COD污染指标大幅降低,是一种处理印染废水的经济有效方法.     

地埋式循环滤料曝气生物滤池处理博物馆污水

采用以循环滤料曝气生物滤池（BAF）为主体的地埋式一体化设备处理博物馆污水。运行结果表明,设计水量为80m3/d,进水COD、SS、NH3-N平均浓度分别为320、200、40mg/L时,处理后出水相应指标分别降至45、30、8mg/L,出水水质达到《污水综合排放标准》（GB 8978—1996）的一级标准。     

采用水解酸化/氧化沟/高效纤维滤池工艺的污水厂设计

某县城经济开发区污水处理厂一期设计规模为1.5×10^4 m^3/d,针对污水厂来水中含有一定比例工业废水的特点,采用水解酸化/氧化沟/高效纤维滤池工艺进行处理。该污水厂于2018年11月投入运行,在进水水质波动较大的情况下,出水COD<50 mg/L,SS<10 mg/L,NH3-N<3 mg/L,TN<15 mg/L,TP<0.4 mg/L,能稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)中一级A标准。污水厂厂区工程费用为6333.8万元,平均运行成本为0.78元/m^3。介绍了该污水处理厂的设计特点、主要构筑物参数、投资及运行成本,可供类似项目参考。     

Removal of leachate pollutants using flocculation method at simultaneous factors of optimum pH and Tacca leontopetaloides biopolymer flocculant (TBPF) dosage via face-centred central composite design

The effect of the interaction factor between pH and dosage is important in leachate wastewater treatment. This study aims to remove leachate pollutants such as turbidity, total suspended solid (TSS), chemical oxygen demand (COD) and colour using simultaneous factors of plant-based Tacca leontopetaloides biopolymer flocculant (TBPF) dosage and leachate pH. The flocculation process was carried out through jar test by applying the perikinetic theory and statical analysis (face-centred central composite design). The results found that the optimum leachate pH and TBPF dosage were pH 3 and 150 mg/L, respectively. The highest removal of leachate pollutants reached up to 69% with a second-order perikinetic model; R² = 0.9545 and k = 9 × 10⁻⁶ L/mg/min were obtained. Simultaneous interaction factors between leachate pH and TBPF dosage on turbidity and TSS removal were found significant and hence can be applied in the actual leachate wastewater treatment industry, particularly at the primary stage using the proposed model.     

高浓度苹果汁加工废水处理工程

采用水解酸化 +接触氧化工艺处理苹果汁加工废水 ,废水水量 10 0 0m3/d ,进水水质 :CODcr≤ 80 0 0mg/L ,BOD5≤ 480 0mg/L ,SS≤ 60 0 0mg/L ,pH :4～ 8,出水水质满足《污水综合排放标准》(GB8978- 96)中的二级标准 .该工艺运行稳定 ,管理简便 ,产泥量少