Method for treatment and cyclic utilization of sulfuric acid waste water containing heavy metal
A technology for wastewater treatment and heavy metals, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems that wastewater cannot be recycled, sulfuric acid wastewater treatment is achieved, and the operation is not stable enough , to achieve stable operation, avoid fouling, and high treatment efficiency
Inactive Publication Date: 2014-07-16
XIANGTAN UNIV
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Abstract
The invention discloses a method for treatment and cyclic utilization of sulfuric acid waste water containing heavy metal. The method for treatment and cyclic utilization of the sulfuric acid waste water containing the heavy metal comprises the steps that (1) the sulfuric acid waste water containing the heavy metal enters a mechanical mixing reaction tank, neutralization reaction is conducted between the sulfuric acid waste water containing the heavy metal and excess lime slurry under mechanical mixing; (2) water discharged out of the mechanical mixing reaction tank enters an aeration reaction tank, ferrous sulfate is added into the aeration reaction tank and compressed air is introduced into the aeration reaction tank, and then aeration reaction is conducted; (3) water discharged out of the aeration reaction tank enters a pressure filter to be filtered; (4) water filtered through the pressure filter enters a secondary reaction tank, and the filtered water is treated continuously by adding ferrous sulfate into the secondary reaction tank and introducing compressed air into the secondary reaction tank; (5) water discharged out of the secondary reaction tank enters a carbon dioxide decalcification reaction tank, and treatment such as aeration is conducted through compressed air containing carbon dioxide. The method for treatment and cyclic utilization of the sulfuric acid waste water containing the heavy metal has the advantages that the treatment efficiency is high, operation is stable, emission is reduced, and cyclic utilization can be achieved. By the adoption of the method for treatment and cyclic utilization of the sulfuric acid waste water containing the heavy metal, treatment of the sulfuric acid waste water containing the heavy metal can meet the requirements of the sulfuric acid industrial pollution discharge standard (GB26132-2010).
Application Domain
Water contaminantsMultistage water/sewage treatment
Technology Topic
ChemistryCarbon dioxide +13
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