垃圾渗滤液中有机组分在混凝前后的变化

垃圾渗滤液是生活垃圾填埋场主要的二次污染物,其成分非常复杂,目前还不能对渗滤液中的有机物进行全面分析.研究表明,经生物处理后的渗滤液中的主体有机物是腐殖酸.腐殖酸经过前处理工艺后仍有很多不可降解,因此,它是渗滤液中最主要的长期性有机污染物,是使渗滤液不能达到排放标准的主要问题.     

Production and application of a novel bioflocculant by multiple-microorganism consortia using brewery wastewater as carbon source

The flocculating activity of a novel bioflocculant MMF1 produced by multiple-microorganism consortia MM1 was investigated. MM1 was composed of strain BAFRT4 identified as Staphylococcus sp. and strain CYGS1 identified as Pseudomonas sp. The flocculating activity of MMF1 isolated from the screening medium was 82.9%, which is remarkably higher than that of the bioflocculant produced by either of the strains under the same condition. Brewery wastewater was also used as the carbon source for MM1, and the cost-effective production medium for MM1 mainly comprised 1.0 L brewery water （chemical oxygen demand （COD） 5000 mg/L）, 0.5 g/L urea, 0.5 g/L yeast extract, and 0.2 g/L （NH4）2SO4. The optimal conditions for the production of MMF1 was inoculum size 2%, initial pH 6.0, cultivating temperature 30℃, and shaking speed 160 r/min, under which the flocculating activity of the MMF1 reached 96.8%. Fifteen grams of purified bioflocculant could be recovered from 1.0 L of fermentation broth. MMF1 was identified as a macromolecular substance containing both protein and polysaccharide. It showed good flocculating performance in treating indigotin printing and dyeing wastewater, and the maximal removal efficiencies of COD and chroma were 79.2% and 86.5%, respectively.     

活性焦理化特性对印染废水中有机物吸附特性的影响研究

为去除印染废水中的复杂有机物,采用活性焦作为吸附剂,考察了吸附作用对有机物种类和含量的影响,分析了活性焦的理化特性及其对吸附特性的影响。结果表明,活性焦吸附可将原水中的有机物(芳香烃及烷烃衍生物)含量由89.1%降至30.5%,活性炭吸附仅可将有机物含量降至87.7%。活性焦表面官能团对吸附特性影响较小,其种类、含量均与活性炭相近。发达的中孔结构对活性焦的吸附特性有重要影响,中孔比表面积达到114.111 m²/g,占总比表面积的28.6%,是活性炭的2.7倍。     

柔性电路板(FPC)废气处理工程实例分析

根据某柔性电路板企业产生的废气污染物成分特征,分别采用布袋除尘器、活性炭吸附、碱液洗涤塔、水洗涤塔、液碱+次氯酸钠洗涤塔净化.该工程总投资为270万元,年运行成本为198.96万元.排气硫酸雾、盐酸雾、氮氧化物、甲醛、含氨废气、氰化氢、含锡废气、有机废气、粉尘浓度分别为0～0.10、0.01～1.36、0～0.53、0...     

厌氧-好氧处理变性淀粉生产废水

南开大学膜分离技术研究中心将膨胀颗粒污泥床(EGSP)处理工艺与活性污泥好氧处理工艺相结合，处理天津顶峰淀粉厂变性淀粉生产废水。该厂     

三相生物流化床和气浮法处理化纤印染废水

生物流化床工艺具有停留时间短、去除有机负荷高、工艺简单、占地面积小等优点,是国外70年代发展起来的新型废水生物处理工艺。国内过去试验的各种生物流化床,还存在着供氧方式(由回流水提供)不经济、生物载体随出水流失或脱膜方法未解决等问题,在一定程度上限制了生物流化床在生产中的应用。为此,本试验采用带中心角的三相内循环     

印染行业实行清洁生产的途径

介绍了清洁生产的含义及其重要性，针对印染行业污染严重的问题，提出了推行清洁生产的途径。