厌氧光生物转盘-好氧生物膜久理偶氮染料废水

利用厌氧光生物转盘-好氧移动床膜生物反应器处理偶氮染料废水,探讨了染料浓度、光照时间、供氧条件、硫酸盐浓度4个操作条件对组合:亡艺处理效果的影响.实验结果表明,厌氧光生物转盘对染料废水的脱色和COD去除起主要作用,当光生物转盘连续光照时间为12 h/d,废水中染料质量浓度为100 mg/L,HRT为5 h时,光生物转盘的脱色率达90%左右,COD去除率达70%左右.经过后续好氧移动床处理,厌氧出水中的有毒芳香化合物得到有效降解,系统总COD去除率达90%以上.     

上流式厌氧污泥床反应器处理凉果废水性能研究

采用上流式厌氧污泥床反应器(UASB)法处理凉果废水,考察废水厌氧处理过程中COD、浊度、脱色率、pH、电导率、悬浮物去除率的变化规律。结果表明:随着厌氧时间的增加,UASB反应器对废水的处理效果不断提高。在最适宜的厌氧时间条件下,废水的COD去除率达62.0%、浊度去除率达41.1%、吸光度及脱色率分别为0.498及48.4%、pH为5.4、悬浮物去除率达30.3%。故,UASB法可作为凉果废水的预处理方式,以降低后续废水的好氧处理难度。     

污泥活性炭处理亚甲基蓝染料废水的研究

采用污泥活性炭处理亚甲基蓝模拟染料废水,研究了模拟废水初始浓度、污泥活性炭投加量、pH值、水浴吸附时间等因素对染料废水的脱色率和COD去除率的影响,探讨污泥活性炭处理染料废水的适宜工艺条件。实验结果表明:随着染料废水初始浓度的增大,脱色率和COD去除率均表现出下降趋势;随着污泥活性炭投加量的增加,脱色率和COD去除率效果均十分明显;随着模拟废水pH值的增大,其脱色率基本呈现增大趋势,而COD去除率则先增大后减小,当pH在7.6～7.8时,脱色率与COD去除率均出现最大值;在延长水浴时间的同时,脱色率和COD去除率均表现出较好的效果。本实验处理染料废水的适宜条件为:染料废水的初始浓度为2.5mg/L,调节染料废水的pH值7~8,加入0.8g污泥活性炭,30℃条件下2h。     

内电解-厌氧-好氧工艺处理制药废水试验研究

采用“内电解-厌氧-好氧”工艺处理混合制药废水，试验证明：在厌氧段HRT=120h，好氧段HRT=48h条件下，当混合废水进水CODcr约为18600mg／L时．总COD去除率可达90％以上，出水达到GB8978-96二级排放标准。     

好氧、厌氧/好氧交替和厌氧条件对碱减量废水处理效果研究

以聚酯纤维碱减量废水为研究对象,利用活性污泥法对比在好氧、厌氧/好氧交替和厌氧条件下对碱减量废水的处理效果.结果 表明,好氧条件下碱减量废水降解效果最佳,运行72 h时COD和UV254的去除率分别为97％和99％;厌氧/好氧交替条件次之,COD和UV254的去除率分别为80％和81％,厌氧条件下废水降解效率最低,CO...     

C.I.活性黄145的生物降解特性研究

文章主要研究在厌氧、好氧、厌氧/好氧条件下,通过采用活性污泥法生物降解活性染料C.I.活性黄145,从而了解该染料生物降解的特性。研究结果表明,在无外加碳源,染料浓度100 mg/L条件下,厌氧、好氧、厌氧/好氧条件下染料去除率均低于9.1%,而在外加碳源之后染料去除率明显升高,厌氧条件下染料去除率为90%。厌氧条件下能够处理更高浓度染料废水,染料浓度700 mg/L,去除率50%;好氧条件下染料浓度50~200 mg/L,染料去除率66%~12.7%;厌氧/好氧时染料去除率在厌氧段高。紫外-可见全波段扫描可知,在厌氧条件下染料在224 nm、256 nm、289 nm、416 nm的特征吸收峰或是降低或是消失。     

聚硫橡胶废水厌氧生物降解特性的试验研究

针对聚硫橡胶废水的水质特性,分析探讨了采用厌氧生物处理法处理该废水的可行性以及在不同浓度下厌氧生物法的处理效果.试验结果表明,常温下,废水COD为2 500 mg/L时,COD去除率达到88.7%.当COD>10 000 mg/L时,相应的COD去除率较低且较为接近.该废水有较强的缓冲能力,水解的最佳时间为4 h.脱色率达到70.2%.     

厌氧-好氧组合工艺处理制药废水的试验研究

采用上流式厌氧污泥床反应器-移动床生物膜反应器串联装置,处理含有大量氨基酸和皂素的制药废水。系统的总COD去除率平均在86%左右。当厌氧反应器的COD容积负荷为10～21kg/(m3·d),COD去除率平均为70%左右;好氧反应器的COD容积负荷率为2.48～2.87kg/(m3·d),COD去除率为59%。     

组合工艺处理含PVA印染废水的研究

常温条件下,采用混凝-A／O（兼氧／好氧）-气浮组合工艺处理含PVA浆料的高浓度印染废水的工程实例研究。结果表明：常温下含PVA印染废水经该工艺处理后CODcr去除率达95％,SS去除率达91％,色度去除率达90％以上,该工艺具有能提高废水可生化性、脱色效果好、处理效率高、耐冲击性能好、操作管理方便的特点。     

膜生物反应器与SBR法处理染料废水的比较

本文通过对浸没式膜生物活性炭反应器（SMBACR）与SBR法处理染料废水的实验结果的比较和讨论。结果表明，在同样的水质条件下，膜生物反应器对染料废水的处理效果明显优于SBR法，对于CODCr1000mg/L左右的活性黑和活性黄废水，在好氧HRT48h的条件下，SMBACR的CODCr去除率和脱色率可达95％以上。     

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

This study investigated the treatment of an azo dye, as a biorecalcitrant model, from industrial wastewater by using Cu/Mg/Al-chitosan in a fluidized catalyst-bed reactor. A number of variables were used to study the impact they had on the oxidation process involving azo dye. The maximum degradation of the azo dye was achieved at 7 g Cu/Mg/Al-chitosan. The chloride and sulfate ions had a synergistic effect on azo dye removal. The oxidation of the azo dye under the selected conditions was of pseudo-first-order. Textile wastewater could effectively be treated using a low concentration of about 7 g of Cu/Mg/Al-chitosan in a short hydraulic retention time of 10 min. The use of Cu/Mg/Al-chitosan demonstrated a promising method to eliminate the azo dye from the wastewater.     

高锰酸钾降解偶氮染料酸性橙Ⅱ实验研究

目前对于水溶性的染料废水的脱色，传统的生物处理方法很难达到要求。高级氧化技术证明是一种非常有效的去除染料色度甚至实现完全矿化的方法。本文研究了高锰酸钾对偶氮染料酸性橙Ⅱ的脱色效果，考察了酸性橙Ⅱ初始浓度、高锰酸钾投加量、初始pH条件、反应时间的影响。结果表明，高锰酸钾能够实现酸性橙Ⅱ的有效去除。高锰酸钾在酸性条件下的脱色效果最好，中性条件下最差。高锰酸钾是一种稳定的氧化剂。     

TiO2光催化氧化降解偶氮染料废水的研究

以偶氮染料直接耐酸大红4BS模拟废水为研究对象,以TiO2为光催化剂,紫外灯作光源（80W）,探究了不同TiO2催化剂的用量、光照时间、溶液初始pH值及废水初始质量浓度等因素对偶氮染料废水降解率的影响。实验结果表明,偶氮染料直接耐酸大红4BS废水的最佳处理条件为：TiO2催化剂质量浓度1．2g／L,光照时间120min,初始pH值10,废水初始质量浓度20mg／L。在最佳处理条件下,对某染料厂的实际工业废水样进行了降解率的测定,得出其降解率在90％以上。     

偶氮类染料废水处理技术的研究进展

染料的使用伴随着大量有机废水的产生,不但对环境保护带来巨大的威胁还危及人类的身体健康。在印染工艺中,偶氮类染料是应用最广泛的一类合成染料。综述了国内外偶氮类染料废水处理技术的研究现状,对物理法、化学法、生物法在偶氮类染料废水处理中的应用进行了简要介绍,并阐述了各种方法的作用机理。根据绿色化学的要求对现有处理技术进行改进,以提高偶氮类染料废水的处理效率使其达标排放。     

光降解偶氮染料的研究进展

本文对偶氮染料废水的处理方法,TiO2光催化氧化法降解染料废水的机理,以及提高偶氮染料废水光催化氧化效率的途径进行了综述,重点对国内外偶氮染料废水光催化氧化技术的最新研究进展进行了分析,并展望了TiO2光催化氧化降解偶氮染料废水今后发展的方向和趋势。     

溶剂浮选光度法测定水中混合偶氮染料的含量

采用溶剂气浮光度分析联用技术,研究了同时测定水中混合偶氮染料的影响因素,优化出最佳溶剂浮选条件,实验表明,染料的溶剂浮选萃取率大于96%,浓度在1~150 mg/L时,溶剂中离子缔合物的吸光度与水中活性艳红X-3B和活性黄X-R的浓度均具有较好的线性关系,相关系数为0.998以上,RSD小于1.8%。     

Electrochemical monitoring of water remediation by metallic iron

Oxidation reduction potential (ORP) changes were monitored during the course of the remediation of four wastewater matrices by metallic iron (Fe⁰) based on a batch fluidized bed reactor. Two of these matrices contained azo dyes (Acid Orange II and Acid Blue 113), another contained pentachlorophenol and the fourth was an authentic dyewaste. For the azo dye Acid Orange II ORP was found to follow the same trend as the dye concentration ([AOII]), decreasing exponentially with time over the course of the remediation. Change in ORP was found to be directly proportional to [AOII] and to follow a logarithmic relationship with [Fe²⁺]²[aa]²[AOII]^–1, indicating a Nernstian behaviour. It is concluded that the ratio of remediation products to reactants can be determined directly by monitoring changes in ORP. The electrochemical conditions that influence corrosion were found to control remediation, consistent with the remediation being driven by anaerobic corrosion and predicted from potential–pH Pourbaix diagrams.     

木质素活性炭处理偶氮染料废水的试验研究

文章对木质素活性炭处理偶氮甲基橙染料废水的反应进行了试验研究,考察了木质素活性炭的投加量、反应时间、反应温度、废水浓度、进水pH对处理效果的影响。结果表明,活性炭对低浓度偶氮染料废水有较好的处理效果,温度对处理效果的影响小,偏酸性条件对处理效果有帮助,最佳的反应条件在常温状态下,pH为6.0,反应时间约60min。     

Impact of ozonation on subsequent treatment of azo dye solutions

BACKGROUND: Aqueous solutions of four azo‐dyes, Acid Red 14 (AR14), Congo Red (CR), Reactive Black 5 (RB5), and Reactive Violet 5 (RV5) were treated with ozone, and the impact of ozonation on their subsequent treatability by aerobic biodegradation processes was investigated. RESULTS: In all cases, ozonation at the highest ozone doses investigated could remove more than 96% of the original dye, and the corresponding residual colour of the azo dye solutions declined to less than 20 on the Pt‐Co scale. Ozonation also resulted in reduction of chemical oxygen demand (COD), total organic carbon (TOC) the COD/TOC ratio and pH, while in all cases electrical conductivity of the dye solutions increased. Activity of the microbial colonies present in domestic wastewater was not inhibited when un‐ozonized solutions of these dyes were mixed in a 1:1 volumetric ratio with domestic wastewater, although the dyes themselves were not degraded. Also, no significant inhibition of microbial activity was observed in 1:1 mixtures of ozonized dye solutions and domestic wastewater, especially when the initial dye concentration was low and the applied ozone dose was high. In almost all cases, progressively enhanced BOD exertion was observed in mixtures containing dye solutions ozonized with progressively higher doses. This indicated that some ozonation by‐products of the above dyes could be degraded by microorganisms present in domestic wastewater. CONCLUSIONS: It was concluded that the above dye solutions, after ozonation for partial or complete colour removal, could be mixed with domestic wastewater for subsequent treatment by aerobic biological processes, with no adverse impact on the activity of the microbial colonies present in domestic wastewater. Copyright © 2007 Society of Chemical Industry     

偶氮染料废水的水生植物-电解联合净化效应研究

结合电解处理技术和植物修复技术理论,建立了植物-电解联合净化系统,并用于对混合偶氮染料溶液的处理实验。结果表明,偶氮染料废水经植物-电解联合净化后水质更加稳定,脱色率和COD去除率最高分别可达98.7%和85%;出水微生物抑制率和生物抗过氧化能力显著降低,出水苯二胺和芳香胺类物质残留最大削减量分别为81.25%和99.17%。