山西焦化厂酚氰废水处理现状及发展趋势展望

简要介绍山西焦化厂酚氰废水处理工艺及回用现状,并对干熄焦技术实施以后所带来的酚氰废水出路问题进行了探讨,对焦化酚氰废水的深度处理工艺和回用途径进行了分析,提出了减量化和资源化是焦化企业酚氰废水"零排放"的根本出路。     

焦化酚氰废水在炼铁烧结系统的综合利用

介绍安钢焦化酚氰废水的基本情况和处理现状;针对酚氰废水存在的问题,通过一系列的技术改造,实现了焦化酚氰废水在炼铁烧结系统的综合利用,解决了困扰钢铁行业的环保难题,顺利完成工业废水零排放的目标。     

首钢京唐烧结利用焦化酚氰废水的研究

为了综合利用焦化产生的酚氰废水,实现企业废水零排放,首钢京唐烧结厂就使用酚氰废水对有害元素贡献、对烧结设备以及对烧结过程中生石灰消化、粘性和成矿等方面的影响进行了系统研究。在此基础上,针对设备进行改造,稳定了焦化酚氰废水的使用量,同时将其对烧结矿质量的影响降到最小。     

酚氰废水处理效果分析

酚氰废水含有大量的有毒有害物质,由于其浓度高、成分复杂,处理起来难度较大。随着环保工作要求的逐年提高,酚氰废水的处理效果更加受到人们的关注。本文通过对酚氰废水的来源、水质特点、处理工艺对比分析,详细描述了西昌焦化厂目前的处理工艺演变过程和处理现状水平。     

关于焦化厂酚氰废水治理途径的探索

本文回顾了我国传统的治理焦化酚氰废水技术在实践中出现的诸多问题.指出了废水污染控制必须前移,为治理创造条件.提出了酚氰废水新的物化法治理工艺方案,介绍了新工艺方案运行的有关情况.     

焦粉吸附法深度处理工艺的设计及应用

介绍了一种以焦粉为吸附剂深度处理酚氰废水的工艺。该工艺投资、运行成本低,占地小,无二次污染,对降低酚氰废水COD、色度效果显著,在焦化行业具有广泛的应用前景。     

AA/O法在焦化废水处理上的应用

采用厌氧一缺氧-好氧(AA／O法)处理高浓度焦化酚氰废水，效果好，解决了传统生化处理法处理酚氰废水氨氮、COD超标排放问题，出水水质符合GBl3456—1992二级标准。     

涟钢焦化含酚,氰废水的治理现状及问题探讨

涟钢焦化分厂设计规模年产焦炭56万吨,耗洗精煤80万吨。目前只有1座焦炉投入生产,若按最终规模二座42孔焦炉计,每小时产生12吨高浓度的含酚废水(含酚600—1500毫克/升)和100吨高浓度的含氰废水(其中80吨/小时为循环使用,20吨/小时为外排量,含氰化物100—150毫克/升),还产生低浓度的含酚氰废水10—15吨/小时,共计42—47吨/小时含酚氰废水。我厂于73年建成投产二级处理     

生化脱酚技术处理焦炉污水的改进

淮阴市冶金工业公司焦化厂生化酚脱工段,利用活性污泥法处理焦炉排出的含有酚、氰有毒物质的剩余氨水,从而保证外排废水含酚<0.5mg/l,氰化物<0.5mg/l,达到国家规定的废水外排标准。6年来,生化工段共处理废水44万多吨,脱酚率平均在     

焦化酚、氰废水零排放改造

针对酚氰废水处理系统存在的问题,徐钢焦化厂通过"治理源头,控制总量,闭路使用"等一系列技术改造,分别停运了一套蒸氨和生化设施,节约了部分运行费用,处理后的焦化废水最终全部去熄焦,实现了焦化酚、氰废水零排放,解决了目前困扰焦化行业废水处理和最终去向的难题,并通过一年多的运行,效果稳定.     

聚丙烯基阴离子交换纤维吸附过程研究

研究了聚丙烯基阴离子交换纤维在含氰废水中的吸附,结果表明:离子交换无纺布的吸附容量与接枝率有关,接枝率越高吸附量越大。离子交换无纺布对氰化物及Cu,Fe,Zn离子的吸附容量较大。对氰化物及Cu,Fe,Zn的最大吸附量条件是:pH在11.8左右、室温(20士2℃)、吸附时间20~30 min。     

Comparison of Liquid-Liquid Extraction System and Extraction-Evaporation System for High Concentrations of Phenolic Wastewater

Liquid-liquid extraction system (LLES), including extraction section and reverse extraction section, had been applied successfully in the treatment of phenolic wastewater. In this paper, a novel pilot scale system, the extraction-evaporation system (EES) without reverse extraction section was introduced. The treatment capacity of both LLES and EES reached 4.0?m3/h. According to experimental results and economical analysis, EES had higher removal efficiency and lower treatment cost than those of LLES in the treatment of the phenolic wastewater containing 3,200–6,300?mg/L phenol, the concentrations of most resin and dye industrial effluents. The highest extractive efficiency of EES could reach 99.0% within the concentration range of 4,000–5,000?mg/L phenol, and remnant phenol in wastewater varied from 43.6 to 51.2?mg/L. The highest extracted efficiency in LLES arrived at 98.2% and the remaining phenol concentration reached 95.0?mg/L. The average removal efficiency of EES increased 1%, and the treatment cost of EES decreased 4.6%. The pretreated wastewater by EES was able to meet the demands of biological or adsorptive process. Despite that the total investment cost of EES was higher than that of LLES, treatment cost of wastewater per ton by EES was lower than that of LLES.     

Laccase-Catalyzed Removal of Phenol and Benzenediols from Wastewater

A two-step process for the removal of phenol and benzenediols, namely catechol, resorcinol, and hydroquinone, from buffered synthetic wastewater was investigated. The proposed process comprised laccase catalyzed conversion of these substrates using laccase from Trametes villosa followed by the removal of products generated using alum as coagulant. The effects of pH, laccase concentration, substrate concentration, and the presence of a hydrophilic polymer additive [polyethylene glycol (PEG)] to achieve ≥ 95% removal of the substrate in a 3-h reaction period at room temperature were determined. The parent compound, phenol, required the most enzyme, followed by resorcinol, catechol, and hydroquinone. PEG showed no effect on any of the substrate conversions. Substrate conversion and enzyme inactivation were monitored over the reaction period. As phenol and benzenediols might coexist in industrial effluents, enzymatic treatment of an equimolar mixture of these four substrates was examined. Except for hydroquinone, the proposed enzymatic treatment method is a viable alternative means to remove phenol and benzenediols from industrial wastewaters.     

Biodegradation of Phenol with Wastewater as a Cosubstrate in Upflow Anaerobic Sludge Blanket

Anaerobic degradation of phenol mixed with a readily degradable synthetic wastewater (DSWW) as a cosubstrate was studied in a 12?L upflow anaerobic sludge blanket reactor at 30±2°C over a period of 632?days. DSWW was prepared by diluting sugar cane based molasses. The biomass was acclimatized to high phenol concentration by gradually decreasing the DSWW chemical oxygen demand (COD) of 4,000?mg/L. Feed made up of phenol COD and DSWW COD in the ratio of 7:3 (phenol concentration = 1,176?mg/L) was successfully treated at a hydraulic retention time (HRT) of 12?h and organic loading rate (OLR) of 8?g?COD/L?day. Phenol removal ranged from 99.9 to 84% at phenol COD varying from 10 to 70% in the feed. During the entire operation, COD removal varied from about 74 to 91.3%. The influent COD was distributed into CH4–COD ( ～ 72%), effluent COD ( ～ 17%), and sludge and unaccounted COD ( ～ 11%). The process failure occurred at 4:1 phenol COD: DSWW COD. Specific methanogenic activity of granular sludge exhibited uniform activity up to phenol COD of 70%. The performance of the reactor could not be maintained beyond 70% phenol COD even by reducing the sludge loading rate, increasing HRT, or decreasing OLR.     

含氰废水处理方法研究

本文论述了处理现有矿山含氰废水的方法,并从环保角度对各种含氰废水处理手段的优缺点进行比较分析。然后,结合我国近年来矿山含氰废水处理技术的发展,指出未来处理金矿含氰废水的趋势主要是多种方法的联合应用、新技术的开发以及高效节能装置的配套研发。     

稀土离子均相电催化氧化处理含酚模拟废水

以不同稀土离子为催化剂,研究了含酚模拟废水的电催化氧化降解.以COD和苯酚的去除情况作为考察指标,确定最佳催化剂及其最佳处理条件;考察了稀土离子与过渡金属离子的投配比对废水处理效果的影响,并对4种稀土催化剂的电化学性能进行了测试.结果表明:所选稀土离子La3+、Ce4+、Pr3+、Nd3+对苯酚的氧化均有良好的电催化性能,其中Pr3+的均相电催化效果最好.在pH =3、电流密度为66.7mA · cm-2条件下,Pr3+投加 量为0.11mmol·L-1能达到最好的降解效果.在此条件下电解废水60min时,COD和苯酚去除率分别达到62.1％和76.3％,比未加催化剂分别提高35.1％和36.6％.Pr3+和Mn2+的协同作用可提高废水的处理效果,当Mn2+与Pr3+的投配比为1∶1时电催化处理效果最好.