纤维素基絮凝-脱色复合功能材料制备及其处理染料溶液效果评价

在聚丙烯酰胺(Polyacrylamide,PAM)改性膨润土(Bentonite)中加入竹浆纤维素(Bamboo pulp cellulose,BPC),通过自由基聚合制备纤维素基絮凝-脱色复合功能材料(BPC-g-PAM-bent),将其应用于染料溶液和实际印染废水的絮凝脱色处理,同时采用傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、热重分析仪(TGA)和Zeta电位仪等表征BPC-g-PAM-bent产品的结构与性能。结果表明:BPC与PAM的自由基共聚反应引入了酰胺基团(-CONH-),使得PAM通过醚键与纤维素骨架连接;BPC-g-PAM-bent产品在pH 2~12范围内始终呈现出负电性,且负电性随着pH增大而增强。BPC-g-PAM-bent产品的絮凝-脱色效果与改性时间、反应时间、PAM用量、Bentonite用量和引发剂用量有较大关联,优化条件下产品对酸性橙2、碱性红46、活性蓝19染料溶液的去除率分别可达98.5%、99.0%、99.9%,对实际印染废水的色度去除率为97.4%,浊度去除率为98.3%,CODCr去除率为87.1%。

毛皮染色废水脱色工艺研究及其在循环使用中的应用

以毛皮染色废水循环使用为目的，优选高效脱色剂和絮凝剂，研究同时具备脱色、分离重金属、快速絮凝沉降除去有机杂质的高效絮凝一脱色染色废水处理工艺。研究结果表明：石灰＋絮凝剂H9052＋脱色剂WS组合，适合毛皮染色废水循环使用废水絮凝一脱色处理；依水质不同和循环次数的不同，对脱色剂和絮凝剂的投加量需做适当调整，10％WS脱色剂溶液最大用量为6250mL／t，0．1％H9052絮凝剂溶液最大用量为8000mL／t；脱色率80％～95％，处理后的废水水质清澈，均可做到循环利用2次以上。处理后废水的总铬含量可降至1．5mg／L以下，符合染色要求和车间废水排放对铬含量的要求。

Screening of One Microbial Flocculant for Treatment of Methyl Orange Wastewater and its Decolorization Effect

[Objective] To screen out a microbial flocculant with good decolorization effect on methyl orange wastewater,and study the effect of different cultural conditions on decolorization effect of methyl orange.[Method] Absorbance of methyl orange solution before and after decolorization was determined by spectrophotometer,and the decolorization rate was calculated to compare the effects of different cultural conditions on removal rate of methyl orange.[Result]An optimal actinomycete stain（F-1-2） was screened out,and the best cultural condition was as follows：with sucrose as carbon source and NaNO3 as nitrogen source,cultured in constant temperature oscillator at 150 r/min,30℃ for 72 h.Under the optimal condition,the removal rate against methyl orange could reach 68.4%.[Conclusion]Different culture conditions have great impact on decolorization effect of strain.

AB生化法在印染废水处理中的应用

AB法生物处理工艺是当前污水处理最佳新型实用技术。本文通过AB生化法和化学混凝-生物絮凝沉淀脱色预处理相结合的工艺处理印染废水的工程实例,阐明AB法的原理和设计方法。