Experimental Study on Coagulation Pretreatment of LAS in Rural Grey Water
The experiment took rural grey water as the research object,and used coagulation pretreatment to degrade anionic surfactants(LAS)in rural grey water.Inorganic coagulants were selected to degrade LAS,and PAC was selected from polyaluminum chloride(PAC)and polyferric chloride(PFS)as the experimental coagulant.Using a single factor influence experiment,discussed the effects of coagulant PAC dosage,coagulant aid PAM dosage,grey water pH,and settling time on the removal rate of LAS in grey water.When the dosage of PAC was 40～55 mg/L,the dosage of PAM was 2.5 mg/L,the grey water pH was 7～8,and the static settling time was 15 min,the minimum concentration of LAS effluent could reach 4.86 mg/L,which could meet the requirements for reuse.
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