化学催化反应和生物氧化处理系统对不可生物降解纺织废水的处理有效性研究  

Chemical catalytic reaction and biological oxidation for treatment of non-biodegradable textile effluent

作　　者：孔杰 KONG Jie(DongyingChemical School,Dongying Shandong 257400)

机构地区：[1]东营市化工学校,山东东营257400

出　　处：《天津化工》2022年第6期50-53,共4页Tianjin Chemical Industry

摘　　要：本文研究了化学催化反应和生物氧化系统对不可生物降解纺织印染废水脱色的有效性。该处理系统使用亚硫酸氢盐催化的硼氢化钠还原和活性污泥技术,在环境温度和压力下去除颜色。研究包括还原处理和生物氧化两大部分,使用合成废水和实际废水进行研究。合成废水由直接染料、碱性染料和活性染料等制成。实际废水来自山东两个不同纺织行业。通过红外和紫外光谱仪对原废水和处理后废水进行表征。研究结果表明,新开发的处理技术将颜色、生化需氧量、化学需氧量和总悬浮固体分别降低74%~88%、76%~83%和92%~97%。红外光谱和紫外线吸收光谱分析表明,不可生物降解的染料会转化为可生物降解的有机化合物,如烷基和烯烃。这种方法相对其他方法(吸附和凝聚)的主要优点是可以去除颜色且不会引起任何问题。研究发现,处理实际废水的最佳用量为催化剂亚硫酸氢盐50~60 mg/L和硼氢化钠200~250 mg/L。将该技术与其他已报道的化学-生物联合方法比较后发现,新技术具有更高的效率和更低的成本。The effectiveness of a combined reduction-biological treatment system for the decolorization of nonbiodegradable textile dyeing wastewater was investigated.In this treatment system,a bisulfite-catalyzed sodium borohydride reduction followed by activated sludge technique was used in order to remove the color at ambient temperature and pressure.This experimental study consisted of two major parts:reduction treatment and biological oxidation.Both synthetic and actual wastewater was used in this research.Synthetic wastewater was made by several groups of dyes such as direct,basic and reactive colors.Actual wastewater was collected from two different textile industries in the city of Isfahan,Iran.The characterization of raw and treated wastewater was carried out by infrared and ultraviolet spectrometers.The results of this study demonstrated that the newly developed treatment technique decreased color,biochemical oxygen demand(BOD),chemical oxygen demand(COD)and total suspended solids(TSS)by 74%~88%,76%~83%and 92%~97%,respectively.The IR and UV analyses showed that non-biodegradable dyes are converted to biodegradable organic compounds such as alkyl and alkenes.Another major advantage of this method with respect to other methods,namely,adsorption and coagulation,was that it removes color without causing any disposal problem.The optimum dosage for treatment of actual wastewater was found to be 50~60mg/L for catalyst bisulfite and 200~250 mg/L for sodium borohydride.Finally,a bench-scale experimental comparison of this technique with other reported combinedchemical-biological methods showed higher efficiency and lower cost for the new technique.

关 键 词：纺织废水 染料 化学还原 生物降解 脱色剂 

分 类 号：TQ042[化学工程]