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Volume 38 Issue 10
Nov.  2020
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XING Si-qi, WU Xu, YANG Hua-rong. COMPARATIVE STUDY ON LAND USE OF DEHYDRATED SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 196-201. doi: 10.13205/j.hjgc.202010031
Citation: XING Si-qi, WU Xu, YANG Hua-rong. COMPARATIVE STUDY ON LAND USE OF DEHYDRATED SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 196-201. doi: 10.13205/j.hjgc.202010031

COMPARATIVE STUDY ON LAND USE OF DEHYDRATED SLUDGE

doi: 10.13205/j.hjgc.202010031
  • Received Date: 2019-09-10
  • Three typical dewatered sludge were taken as research objects, and mixed with soil as the cultivation substrate for potted experiment of ryegrass, in order to understand the effect of dehydration on subsequent land use of sludge. By measuring the organic matter content, pH, bulk density, porosity and other physical and chemical properties of the composite matrix after planting, and observing the growth status of ryegrass, the influence of sludge through different dehydration processes on soil improvement was studied. Soil column leaching experiment was used to simulate 1 year’s precipitation, the environmental risk of electrolytic dewatering sludge was studied. The key research results were as follows: the dehydrated sludge by electrolysis and mechanical pressure filtration had good effect on soil water retention; the content of Cu, Cr, Cd, Pb, Ni in leachate was determined by using electrolytic dehydrated sludge as the soil conditioner after simulating 1 year’ natural precipitation, which proved electrolytic dewatered sludge pollution risk was low.
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