排序方式: 共有101条查询结果,搜索用时 46 毫秒
61.
62.
复合絮凝剂在治理棉纤维生产废水中的应用 总被引:2,自引:0,他引:2
运用正交实验设计的方法,对化纤厂生产棉浆粕过程中产生的黑液,进行了絮凝剂各类和用量的选择研究。据此,可以为确定工艺中絮凝剂的投加量提供初步数据。同时给出了化学耗氧量(COD)和总有机碳(TOC)之间的线性关系方程。 相似文献
63.
水果渣改性絮凝剂的性能表征 总被引:3,自引:0,他引:3
对化学改性天然高分子絮凝剂的制备及絮凝效果进行了初步研究。以来源丰富的水果渣为原料,分别与氯乙酸、丙烯腈、丙烯酰胺在不同的条件下醚化、聚合,制得多种絮凝剂,用于处理造纸废水。 相似文献
64.
65.
无机和有机复合高分子絮凝剂的现状和发展方向 总被引:7,自引:0,他引:7
概括地叙述了国内外无机和有机高分子复合絮凝剂的现状,简单地介绍了文献所报道的多种新型无机和有机高分子絮凝剂合成方法、原料及其在水处理中的应用。在此基础上,文章最后指出了高分子复合絮凝剂的发展方向。 相似文献
66.
67.
文章使用PAM-C作为絮凝剂,研究超声波与絮凝剂联合作用对污泥脱水性能的影响,通过试验找到了其合理的调理顺序,并针对试验污泥确定了理想的试验参数,为污泥脱水处理找到一种行之有效的实用方法。 相似文献
68.
为获得新型絮凝剂的最佳制备条件,采用人工神经网络(ANN)结合加速遗传算法(AGA)对絮凝剂性能影响因素进行全局寻优。在影响絮凝剂处理性能的主要因素Fe、Al与Si的摩尔比n(Fe+Al):n(Si),B、Mg和Si的摩尔比n(B+Mg):n(Si)以及熟化时间的有效作用范围内,用Box-Behnken Design(BBD)实验设计方法,产生15组影响因素组合作为输入样本,经对印染废水的絮凝处理实验得到相应的COD和色度去除率输出样本,由神经网络方法对15组输入、输出样本数据建模,得到反映絮凝剂制备条件和絮凝剂去除效果的响应关系,并采用加速遗传算法全局优化,得到最大COD去除率和色度去除率条件下的最优絮凝剂制备条件组合,即n(Fe+Al):n(Si)=5.08,n(B+Mg):n(Si)=0.55,熟化时间为2.1 d,对应的印染废水COD去除率为88.10%,色度去除率为95.37%。模型验证实验显示,实验值与模型预测值的最大相对误差不超过5%。相对于响应曲面法,用神经网络结合加速遗传算法优化得到的新型絮凝剂去除印染废水中COD和色度的能力更高,进一步验证了神经网络法在新型絮凝剂制备条件优化中的有效性。 相似文献
69.
Ramzi Khiari Sonia Dridi-Dhaouadi Chadlia Aguir Mohamed Farouk Mhenni 《环境科学学报(英文版)》2010,22(10):1539-1543
Sodium carboxymethylcellulose (CMCNa) is an anionic water soluble polyelectrolyte widely used in many industrial sectors
including food, textiles, papers, adhesives, paints, pharmaceuticals, cosmetics and mineral processing. CMCNa was produced by
chemical modification of cellulose, and represents many advantages: natural, renewable, non-toxic and biodegradable. In this study,
di erent kinds of CMCNa, prepared from an agricultural waste date palm rachis, were tested as eco-friendly flocculants for drinking
water treatment and their performances as flocculants in turbidity removal enhancement were assessed. The prepared materials were
characterized by the degree of substitution (DS) and polymerisation (DP). The study of the e ect of some experimental parameters
on the coagulation-flocculation performance, using the prepared materials combined with aluminium sulphate (as coagulant), showed
that the best conditions for turbidity treatment were given for pH 8, coagulant dose 20 mg/L, flocculant concentration of 100 mg/L
and stirring velocity (during the flocculation step) of 30 r/min. Under the optimum conditions, the turbidity removal using CMCNa,
prepared from raw material, was about 95%. A comparison study between the flocculation performance of a commercial anionic
flocculant (A100PWG: polyacrylamide) and that of the prepared CMCNa showed that the performance of the waste-based flocculant
with a DS of 1.17 and a DP of 480 was 10% better than that achieved by the commercial one. 相似文献
70.