铁屑-电石渣处理电镀废水的研究

采用铁屑还原电镀废水中的六价格，并控制还原时的PH值，使PH=3.0－4.0。再加入工业废渣-电石渣，使电镀废水中重金属离子沉淀。实验表明，PH=8.6－9.1时，重金属离子去除效果最好。经实际运行，出水达到国家排放标准。设备投资少，治理费用低，该方法对电镀企业，尤其是对中小电镀企业具有很好的价值。     

电镀废水的处理方法及有效性研究

环境污染与环境保护方面的知识是高考的必考内容,我们应重视、关注有关环境问题的知识及试题,掌握解答这类试题所需要的知识及解答试题的技巧．     

聚合氯化铝铁(PAFC)处理电镀废水的研究

采用PAFC处理电镀废水并与聚合氯化铝(PAC)和聚合氯化铁(PFC)处理效果进行对比实验,结果表明,PAFC兼有PAC和PFC的优点,形成的絮凝体大而实且沉降速度快。其除水色度比PFC好,除浊效果和絮凝体沉降性能又优于PAC。PAFC可以显著提高去除电镀废液色度的絮凝效果,可以提高Cr6 的去除率,且用量少,适用的pH范围也更广。     

电解-微生物法组合工艺处理含铬电镀废水的试验研究

采用一种新的组合工艺--电解-微生物法来处理含铬电镀废水.试验结果表明Cr6+含量为80 mg·L-1,净化率达99.9%,符合国家排放标准.     

硫酸亚铁法处理电镀含氰废水的试验研究

对硫酸亚铁法处理电镀含氰废水进行了试验研究,探讨了硫酸亚铁除氰的原理及其去除效果。试验结果表明：用硫酸亚铁法处理电镀含氰废水,氰化物的去除率可达97％左右,而且处理费用低,操作简便,具有广泛的应用前景。     

电芬顿-吸附还原沉淀组合工艺处理电镀废水研究

电镀综合废水成分更加复杂,而新颁布的排放标准更为严格,这导致传统处理工艺存在困难。本研究采用电芬顿．吸附还原沉淀组合工艺,在试验验证基础上进行了方案设计和成本分析。结果表明,电芬顿．吸附还原沉淀组合工艺处理电镀综合废水可确保出水水质稳定达到《电镀污染物排放标准》（GB21900-2008）中表3要求,与传统工艺相比具有投资低、运行成本低等优点,具有推广应用价值。     

生物与化学法处理庆大霉素生产废水的研究

EM和高分子絮凝剂对庆大霉素生产废水进行处理，结果显示单独使用EM时最佳的接种量是0．3％～0．4％，pH为8，处理时间为36小时，处理温度取自然温度(室温)，经正交实验最佳组合为B3A3C1，即最佳的温度为30℃，最佳接种量为0．5％，最佳pH为5。处理后COD从20000mg／L降至1000mg／L左右，经高分子絮凝剂处理最佳的pH为8.／10000的絮凝剂聚丙烯酸钠加量为0．75～1．0mL／250mL废液，沉降时间为1．5～2．0h，主要污染指标COD降低到了350mg／L，达到了国家排放标准(≤350mg／L)。     

偶氮染料废水的处理方法及研究进展

偶氮染料废水是一种有机物含量高、成分复杂、色度高、可生化性差的难降解废水,其处理方法已引起广泛关注。本文阐述了物理法、化学法和生物法3种废水处理方法在偶氮染料废水处理中的应用,并对各种方法进行了评述,展望了今后的发展方向。     

化学氧化还原-中和-絮凝沉淀法处理电镀废水中铬的研究

采用化学氧化还原-中和-絮凝沉淀法处理电镀废水中铬,研究了还原pH值、絮凝pH值、絮凝剂的用量、沉降时间对处理效果的影响.还原六价铬的最佳pH在2.0～2.2之间时,絮凝最佳pH值为9时,加入PAM,絮凝时间为0.5小时絮凝效果最好,处理后的Cr浓度最小.     

NCAP在废水pH值控制中的应用

工业生产过程中废水的回收和排放都必须达到国家标准,控制pH值尤为重要.NCAP可全过程控制废水pH值,使之达到要求.     

Electrocatalysis method for wastewater treatment using a novel beta-lead dioxide anode

A novel β-PbO2 anode modified with fluorine resin was developed for typical pollutant electrocatalytic degradation and wastewater treatment. Various operating parameters such as applied voltage (3.5-10.5 V), pH (2-6), salinity of the electrolyte (0.5-2 g／L K2SO4) and initial phenol concentration (100-400 mg／L) were investigated to explore the electrocatalytic ability of the anode by taking phenol as sample. A preliminary study on dyeing wastewater treatment by this method indicated that the biodegradability could be increased to suit subsequent biological treatment. The stability of the anode has been proved to be high against acidity. The anode showed promising application for treatment of wastewater, especially of high salinity and high acidity wastewater.     

铜络合电镀废水的石灰—次氯酸钠氧化处理工艺初探

采用次氯酸钠络合解离—碱性沉淀法对含柠檬酸络合铜离子废水进行处理,考察了pH、次氯酸钠用量、以及反应时间对该方法处理络合铜离子废水结果的影响。结果表明,在体系pH=13,次氯酸钠溶液用量达到4%,反应时间120min的条件下废水中的铜离子可下降到0.2mg.L-1左右,低于国家工业废水排放标准。     

洗刷废水改性膨润土--一种有效的废水处理剂

Trimeric quaternary ammonium surfactants are newly developed surfactants, their widespread synthesis and utilization results in a great amount of scouring wasterwater of high COD, which is unmanageable. The present investigation aims to find a new type of organo-bentonites modified by the scouring wastewater and to treat the scouring wastewater at the same time. Results of adsorption experiments of phenol and formaldehyde by the modified bentonite show that, at the optimal ratio 24 % (W/V) of modified bentonite to scouring wastewater, the removal rate of phenol and formaldehyde by FTAT scouring wastewater modified bentonite is 3.53 times and 2.48 times higher than that of Na-bentonite, and the COD of treated scouring wastewater reduces to below 200 mg/L, meeting the second level of Standards for Discharge of Water Pollutants from the Ammonia Industry of China.     

超声吹脱法处理氨氮废水的应用

针对某炼钒企业废水回用过程中,氨氮不断富集,影响产品质量的问题,采用超声吹脱法对氨氮废水进行处理后,氨氮浓度小于15 mg/L,废水全部回用生产,不外排,消除了环境污染的隐患.     

改进电Fenton法处理印染废水

建立了一个用电Fenton法处理污水的装置,寻找到了最佳处理条件.对于高色度、高COD的印染废水,用电Fenton法COD去除率可达50%-70%,脱色率可达98%.使用微量添加剂后,COD去除率可达91%,色度进一步下降;COD降至60mg/L以下,完全达到工业废水排放标准.使用硫酸锰和硝酸锌微量添加剂可显著提高电Fenton法的COD去除率.这两种微量添加剂,以前尚未见过报导.     

Multi-stage ponds-wetlands ecosystem for effective wastewater treatment

INTRODUCTION Pond systems are commonly employed formunicipal sewage purification, especially in devel-oping countries, due to its cost-effectiveness andhigh potential of removing different pollutants. Un-fortunately, algae would bloom in the ponds andcause secondary pollution of the following stream.To tackle this problem, several methods combiningboth ponds and filtering system had been tried(Christian et al., 2003). Dongying multi-stageponds-wetlands ecosystem was designed embodyi…     

Surfactant scouring wastewater modified bentonites——promising material for unmanageable wastewater treatment

1IntroductionIn recent years,tri meric quaternary ammoniumsur-factants,which have three hydrophobic and three hy-drophilic groups connected bytwo spacer chains,havebeen developed[1-5].The tri meric surfactants appearunique physicochemical properties such …     

On an ecology-friendly treatment reagent for oily wastewater

Bioflocculants have received increasing attention in research because they are low cost, non-toxic, biodegradable, operationally simple and useful in many water and wastewater treatment applications. In this study, we focused mainly on the screening of the flocculant-producing strain and its application in oily wastewater treatment. Bacteria strain B-6-1 was isolated by the pyridine screening method. UPC-1 reagent produced by B-6-1 had efficient flocculating activity. It was deduced that the main component of UPC-1 reagent was polysaccharide through purification and analysis. The influence of dosage of reagent, pH value, temperature and oil concentration on the flocculation effect of UPC-1 reagent was investigated.