正交试验法在河道底泥脱水调理剂筛选试验中的应用

摘要

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.%[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0．0340 g，粉煤灰0．0850 g，生石灰粉0．0340 g，聚合氯化铝铁0．1698 g，比阻为2．12×109 m／kg；配方Ⅱ的最优配比为铁粉0．0148 g，硫代硫酸钠0．0400 g，甲壳素0．0125 g，柠檬酸0．0148 g，比阻为53．70×109 m／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。