Experimental Study on Disintegration of Excess Sludge by Explosive Shock Wave

doi:10.12068/j.issn.1005-3026.2018.03.028

Abstract

Abstract: 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.

Key words: explosion, excess sludge, particle size distribution, shock wave, disintegration, waste treatment

CLC Number:

X703
X705

XIE Yuan-hua， MEI Jian， WANG Jie， ZHU Tong. Experimental Study on Disintegration of Excess Sludge by Explosive Shock Wave[J]. Journal of Northeastern University Natural Science, 2018, 39(3): 446-450.

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