Study on optimizing the formula of arsenic-containing sludge solidification/stabilization agents in waste water treatment station of a copper company
The sludge produced by the sewage treatment station of a copper company contains relatively high concentrations of arsenic,so it is necessary to ensure that the arsenic-containing sludge can be legally and compliantly disposed of in the landfill to conform with relevant environmental protection standard.In this paper,lime,cement,and ferrous sulfate were used as stabilization/solidification agents to treat the sludge.Through the optimization experiments of the agent ratios and comprehensive considerations of economic and technical indicators,the optimal stabilization/solidification agent formula was determined as follows∶arse-nic-containing sludge∶lime∶cement:ferrous sulfate=5∶1∶1∶1.5(mass ratio).
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