Method for repairing arsenic-containing wastewater by using sludge
A sludge and wastewater technology, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of limited arsenic adsorption efficiency, waste of resources, increased cost, etc. The effect of efficient utilization and low energy consumption
Inactive Publication Date: 2017-11-28
QINGDAO HAICHENG INTPROP SERVICES CO LTD
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The invention belongs to the technical fields of recycling of sludge and repairing of arsenic-containing wastewater and particularly relates to a method for repairing arsenic-containing wastewater by using sludge. The method is characterized by purifying the wastewater by using biological iron flocculants generated in an NAFO (Nitrate-dependent anaerobic ferrous oxidation) process of microorganisms in the sludge. The method specifically comprises the steps of pre-culturing the sludge, preparing an NAFO culture medium, preparing the biological iron flocculants and removing arsenic in the wastewater. Through the method, the sludge is converted into the biological iron flocculants by the NAFO process of the microorganisms; the sludge can be recycled; the process is free of secondary pollutants and low in energy consumption; the prepared biological iron flocculants are capable of effectively removing trivalent arsenic and pentavalent arsenic in the water; different types of arsenic-containing wastewater can be repaired.
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