正交试验法在河道底泥脱水调理剂筛选试验中的应用

[目的]筛选具有良好底泥脱水效果的脱水调理剂。[方法]设置了对照(不添加调理剂)和配方Ⅰ、配方Ⅱ2个试验组,其中试验组以底泥比阻为试验指标,以药剂成分为因素、药剂用量为水平,设计正交试验,筛选各配方的最佳组合。[结果]配方Ⅰ的最优配比为活性炭0.034 0 g,粉煤灰0.085 0 g,生石灰粉0.034 0 g,聚合氯化铝铁0.169 8 g,比阻为2.12×109m/kg;配方Ⅱ的最优配比为铁粉0.014 8 g,硫代硫酸钠0.040 0 g,甲壳素0.012 5 g,柠檬酸0.014 8 g,比阻为53.70×109m/kg。[结论]正交试验法在底泥脱水领域具有一定的应用性,不仅可以快速有效地筛选出脱水效果好的药剂,也对脱水调理药剂的配比起到优化作用,对实际生产起到重要作用。

Application of Orthogonal Test in Dewatering Conditioners Screening Test for Sediment Sludge

Objective] The aim was to select dewatering conditioners efficiently.[Method] A control group(without conditioner) and two exper-imental groups(formula I and formulaⅡ) were included in this study.The experimental groups were orthogonal tests,with specific resistance of sludge (SRF) as the index,conditioner compositions as factors and dosages as levels.[Result] The optimal proportion in formula I was:activated carbon powder 0.034 0 g,fly ash 0.085 0 g,quicklime powder 0.034 0 g,polymeric aluminum ferric chloride 0.169 8 g,SRF 2.12 ×109 m/kg;the optimal proportion in formulaⅡwas:iron powder 0.014 8 g,sodium hyposulfite 0.040 0 g,chitin citric acid 0.014 8 g,SRF 5.37 ×1010 m/kg. [Conclusion] Orthogonal test can be used in sediment dewatering field,not only to select dewatering conditioners with good effect rapidly and ef-fectively,but also to optimize the proportions of conditioners,which is vital to practical production.