爆炸冲击波破解剩余污泥的实验研究

为研究爆炸冲击波对剩余污泥的破解效果，进行了两种炸药(RDX和TNT)在不同装药量(10g和70g)和不同污泥质量浓度(20~50g·L^-1)下的实验，以破解前后的化学需氧量、肽聚糖、蛋白质的质量浓度及污泥粒径分布(D50)为指标进行评价.结果表明:随着装药量从10g增加到70g，各浓度检测指标均呈增加趋势，RDX的效果优于TNT;破解后的D50受炸药种类影响不大，均从约36μm降至约24μm.在70g装药量下，随着污泥质量浓度的增加，各浓度检测指标同样呈增加趋势，但对应的增长率主要呈先升后降的趋势;无论RDX还是TNT，爆炸破解后的D50均约24μm，污泥质量浓度的变化对其影响不大.

Experimental Study on Disintegration of Excess Sludge by Explosive Shock Wave

To investigate the effect of explosive shock wave on disintegrating excess sludge， two types of explosives (RDX and TNT) were employed under different dosages (10g and 70g) and different sludge concentrations (MLSS(mixed liquid suspended solids)， 20~50 g·L^-1) to carry out the experiments. Chemical oxygen demand (COD)， peptidoglycan， protein and particle size distribution(D50) of sludge before & after disintegration were selected as evaluation indexes. The results show that all concentration indexes present an increasing trend with explosive dosage increasing from 10g to 70g， and the effect of RDX is better than that of TNT. D50 after disintegration is not distinctively affected by explosive type， dropping from about 36μm to about 24μm for both RDX and TNT. Under explosive dosage of 70g， all concentration indexes show a rising trend with the increase of MLSS as well， but their corresponding increasing rates present mostly an upward trend followed by a downward trend. No matter for RDX or TNT， D50 after disintegration are both around 24μm. The variation of MLSS has no much effect on D50.