聚合硫酸铁铝对城市污水混凝除磷实验研究

采用聚合硫酸铝铁(PFSA)对城市污水处理厂生化出水混凝除磷,考察PFSA投加量对磷和出水pH的影响,污水pH、沉淀时间对混凝除磷效果的影响.同时进行了聚合硫酸铁(PFS)、硫酸铝的混凝除磷比较实验.结果表明,聚合硫酸铁铝(PFSA)具有对出水pH的影响较小,对磷去除率高,pH值适用范围宽的优势.PFSA在投加量为6.0mL/L时,沉淀时间为40min时,出水磷0.24mg/L,磷去除率可以达到84%,出水满足辽宁省污水综合排放标准(DB2008).     

混凝实验用于垃圾渗滤液处理应用研究

垃圾渗滤液是一种成分复杂、有机物浓度高、污染严重的废水.本文针对江苏镇江某垃圾填埋场的渗滤液,探索PAC和PFS两种混凝药剂进行混凝对该废液的处理效果,实验研究发现:在渗滤液酸碱平衡体系被打破的点(pH为4.5左右和11.5左右时),混凝效果最好;PFS的混凝效果要优于PAC的混凝效果;在PFS投加量为2200mg/L,PAM投加量为40mg/L时,可获得50%左右的COD浓度去除率.     

多相芬顿催化氧化实验室高浓度有机废水试验

以白炭黑为载体合成Cu/Al-白炭黑多相芬顿催化剂,构建了多相芬顿催化氧化体系,用以实验室高浓度有机废水处理试验。结果表明:当反应温度25℃,反应体系pH5,催化剂投加量6 g/L,双氧水投加量55 mmol/L,反应120 min时,COD去除率达到52.8%,B/C比由0.06提高至0.36,色度去除率80%。与传统芬顿法相比,多相芬顿体系对高浓度有机废水COD去除率提高12.8%,B/C提升12.5%。催化体系经5次重复后依然保持较为理想的处理效果,反应过程金属离子溶出1.86%,出水无需进行金属离子沉淀处理,可直接进行生化处理。     

曲面优化高铁酸钾与活性炭协同修复黑臭水体

以某小型封闭黑臭水体为对象,研究了高铁酸钾(K_2FeO_4)与粒状活性炭(GAC)协同强化混凝修复黑臭水体的最佳工艺参数和处理效果。采用响应曲面法建立了以氨氮(NH3-N)和化学需氧量(COD)的去除率为响应值的二次回归模型,对两者协同作用时K_2FeO_4投加量、预氧化时间、GAC的投加量和pH值4个影响因子进行优化。结果表明:回归模型极其显著,对NH3-N去除效果的影响显著程度排序为:K_2FeO_4投加量 pH GAC投加量 K_2FeO_4预氧化时间;对COD去除效果的影响显著程度排序:GAC投加量 K_2FeO_4投加量 pH K_2FeO_4预氧化时间。K_2FeO_4最佳投加量1. 036 mg/L,最佳预氧化时间10. 159 min,GAC最佳投加量16. 152 mg/L,最佳pH值7. 362,此时NH_3-N和COD的去除率分别达到了85. 500%和69. 262%。模型预测值与实验验证结果的实际误差小于5%。     

微波辅助Fenton处理中药废水影响因素

用Fenton-微波辐照法处理模拟中药废水,采用单因素实验研究Fenton试剂投加量、pH、微波功率对中药废水降解效果的影响.实验用水的COD为1078 mg/L,色度180倍.当pH为4,Fe2+投加量为200 mg/L,每升水样H2 O2投加量8 mL,微波功率160 w,辐照时间60 s时,COD去除率可达到78％以上,色度去除率可达到72％以上.出水的COD在238 mg/L以下,色度在50以下.微波-Fenton法比单独Fenton法反应时间短,对COD、色度的降解效率高.     

三维电极/Fenton试剂/中和法处理油漆废水的实验研究

采用三维电极/Fenton试剂/中和法对广东某包装厂高浓度油漆废水进行处理,实验结果表明：油漆废水通过铁板三维电极在电压18V、极板间距4cm、pH自然和电解3h条件下,COD去除率达67.1%;电解水在H2O2投加量为13mL/L（30%）、Fe^2＋投加量为40mL/L（10%）、反应时间为3h时,COD为109mg/L;将处理水pH调至6-9,出水COD可降至100mg/L以下,达到国家《污水综合排放标准》（GB8978-1996）二级排放标准。     

吸附法处理实验室废液效果的研究

采用静态吸附法研究活性炭和硅藻土对3种实验废水在不同吸附条件下(吸附剂量、时间、pH值)的吸附效果。结果表明活性炭在投加量为40 g/L,振荡时间为1 h,无机、有机、混合样品pH分别为4、6、10时,可使样品色度和COD去除率达到最佳效果;硅藻土在投加量为30 g/L,振荡时间为20 min时,无机、有机、混合样品pH分别为8、4、4时,可使废水COD去除率达50%以上,但色度去除效果较差。实验表明硅藻土和活性炭串联吸附为较优方案。     

钡渣处理含磷废水的研究

以工业废渣钡渣为水处理剂,研究钡渣对水中磷去除率的影响,进水含磷10 mg/L,钡渣投加量5 g,处理时间90 min,pH为11时,去除率达81.9%.实验表明,钡渣与氢氧化钙协同作用去除水中磷时,去除率高于钡渣或氢氧化钙单独作用的处理效果.投加比例为(钡渣1 g+氢氧化钙1.5 g)/1 mg磷,水中磷的去除率达到90.42%,出水含磷量已经降低到1 mg/L以下,达到国家排放标准.去除率随着pH提高而增加.     

pH／ORP系统在磷化废水处理技术中的运用

对某钣金厂磷化废水采用混凝沉淀法进行处理研究,利用 pH/ORP系统在生产运行中确定了碱和混凝剂的最佳投加量,实现了整个工艺的自动控制,降低了药剂量的使用.结果表明:该法可使原水COD从250mg/L降到50mg/L,总磷从36 mg/L降到0.3mg/L,废水COD和总磷的去除率分别达到80%和99%,达到排放标准.     

聚合氯化铝絮凝剂在电厂水处理中的应用研究

为了提高聚合氯化铝在电厂水处理中的处理效果,以某电厂原水为研究对象,以液体聚合氯化铝为絮凝剂,考察在最佳水力条件下,不同投加量下聚合氯化铝对出水浊度、pH、悬浮物、CODCr等指标的影响情况.研究结果表明,最佳水利参数为:快搅转速200r/min,快搅时间45s,慢搅转速80r/min,慢搅时间15 min;当投加量为12mg/L时,浊度去除率为90.97%,SS去除率可达91.36%,此时出水水质澄清透明.在最佳投加量的确定和保证出水水质的同时,节约了生产成本.     

Acid Separation, Catalytic Oxidation and Coagulation for ATC Waste Liquid Treatment

It is difficult to treat 2-amino-thiazoline- 4-carboxylic acid (ATC) waste liquid effectively at present for its characteristics of high chemical oxygen demand (COD), high salinity and low biodegradability. In order to solve this problem, this paper presents several kinds of physical-chemical treatment unit techniques, including acid separation, catalytic oxidation and coagulation. First of all, acid separation was adopted to precipitate relevant organics at isoelectric point. When the temperature and pH value of acid separation were controlled at about 5 ℃ and 2.2 respectively, the COD removal rate could reach 27.6%. Secondly, oxidation was used to break chemical constitution of refractory organics. The optimal reaction parameters of catalytic oxidation should be 20 ℃, pH adjusted to 5.0 and [Fe^2 ] 300 mg/L. Then with 5% H2O2 added and after one-hour reaction, the COD removal rate could achieve about 52%. Finally, coagulation was adopted to remove a portion of refractory organics, and 15% polymeric molysite flocculant was the best for the coagulation, and the COD removal rate could reach about 15%. Therefore, the proposed feasible process of physicalchemical pretreatment for ATC waste liquid could have about 70% COD removed in total.     

复合式膜生物反应器处理城市污水中水力停留时间的确定

本文在以复合式膜生物反应器系统为基础,以模拟城市污水为处理对象。通过运行条件优化研究,综合脱氮除磷效果及经济因素,将复合区水力停留时间控制在7h左右。此时系统总去除率为:CODcr≧96.28%、NH3-N≧97.54%、TN≧74.87%、TP≧74.34%,出水可以稳定保证在CODcr≦14.35mg/L、NH3-N≦0.74mg/L、TN≦9.02mg/L、TP≦1.05mg/L。效果较好。     

厌氧-复合人工湿地工艺处理农村生活污水研究

针对农村生活污水的水质特点,采用厌氧-复合人工湿地组合工艺处理农村生活污水,结果表明,厌氧池对SS的去除率为80.6%;复合人工湿地对COD、TN的去除率分别为61%和61.4%,对TP的去除率在57%～66%之间。     

Quick start-up of EGSB reactor treating fresh leachate of municipal solid waste

An expanded granular sludge bed (EGSB) reactor inoculated with anaerobic granular sludge was started up with its COD removal performance, self-balancing of pH, biogas production rate and characteristics of the granular sludge during the start-up period being investigated. The results indicated that the EGSB reactor can be started up successfully in 27 d by increasing the organic loading rate rapidly. The removal efficiency of COD was maintained above 93% with influent COD concentration of 25 000 mg/L and OL...     

Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment

Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics parameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the moderate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (KS) were 0.0208-0.0642 L/(gMLSS)·h and 0.44-0.59 (gCOD)/L respectively at 20 ℃-35 ℃. Activation energy (Ea) was 6.05×104 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment.     

Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment

INTRODUCTIONInordertogetpliableandelegantterylenefabricjustlikesilk,terylenegreigeclothisalwayspretreatedwithalkali-decompositionprocesswh-ereinterylenegreigeclothishydrolyzedtosomeextentinNaOHsolutionatcertaintemperature(T)andpressure.Duringthisprocess,thesuperficialterylenefibreispeeledofffromtheclothanddis-solvedintosolution,inwhichteryleneacid(TA)andethyleneglycolaredischargedaspollutantsinwastewater.Theobtainedterylenefabricwithsi-lkenwrinkleandsoftfeelingiscalledartificialsilkfabr…     

UASB工艺处理木薯酒精废液生产运行发现

论述了总有效容积2000m3的新型UASB装置,在中温条件下处理高浓度木薯酒精废水的启动运行和污泥含量控制的过程．当反应器稳定运行时,容积负荷可达7kgCOD／（m3·d）,水力停留时间为2d,污泥保持量在30％-41;％,COD去除率达95％以上,出水COD小于500mg／L．     

A pilot scale trickling filter with pebble gravel as media and its performance to remove chemical oxygen demand from synthetic brewery wastewater

Evaluating the performance of a biotrickling filter for the treatment of wastewaters produced by a company manufacturing beer was the aim of this study. A pilot scale trickling filter filled with gravel was used as the experimental biofilter. Pilot scale plant experiments were made to evaluate the performance of the trickling filter aerobic and anaerobic biofilm systems for removal of chemical oxygen demand (COD) and nutrients from synthetic brewery wastewater. Performance evaluation data of the trickling filter were generated under different experimental conditions. The trickling filter had an average efficiency of (86.81±6.95)% as the hydraulic loading rate increased from 4.0 to 6.4 m³/(m²·d). Various COD concentrations were used to adjust organic loading rates from 1.5 to 4.5 kg COD/(m³·d). An average COD removal efficiency of (85.10±6.40)% was achieved in all wastewater concentrations at a hydraulic loading of 6.4 m³/(m²·d). The results lead to a design organic load of 1.5 kg COD/(m³·d) to reach an effluent COD in the range of 50–120 mg/L. As can be concluded from the results of this study, organic substances in brewery wastewater can be handled in a cost-effective and environmentally friendly manner using the gravel-filled trickling filter.     

奥里油废水生物处理试验研究

以奥里油为原料生产重交沥青时所产生的废水与一般炼油废水不同,其是一种含有大量表面活性剂、高有机污染物的重污染废水。选用好氧和厌氧生物处理的方法对奥里油废水进行了初步试验研究。研究结果表明:奥里油废水具有一定的可生化性,可以采用生物处理的方法进行净化处理。该废水经过生物处理后,原水COD可从5 677mg/l下降到500mg/l左右,COD去除率可达90%以上。     

SBR工艺在处理模拟制革废水中运行参数的优化

在处理制革废水中常用SBR工艺,试验探讨了不同HRT、进水pH、COD负荷、NH3-N浓度、活性污泥浓度的运行参数,研究SBR工艺处理制革废水的最优运行参数．结果表明：SBR反应器在进水COD为1500～2000mg／L、NH3-N为150～250mg／L、pH为7．5、运行污泥浓度在3．0g／L左右、曝气时间为18h时COD去除率能达到95％左右,NH3-N去除率达到97％左右,其出水能够达到一级出水标准．