Method for processing chromium-containing wastewater by using biological agent

The invention discloses a method for processing chromium-containing wastewater by using a biological agent, belonging to the field of wastewater treatment for environmental protection. The specific method comprises the steps of: adding a biological agent at a mass volume concentration of 0.1-0.6 g/L...

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Bibliographic Details
Main Authors LEI SIYU, JIN LIJUN, LEI CHUNSHENG
Format Patent
LanguageChinese
English
Published 30.05.2012
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:The invention discloses a method for processing chromium-containing wastewater by using a biological agent, belonging to the field of wastewater treatment for environmental protection. The specific method comprises the steps of: adding a biological agent at a mass volume concentration of 0.1-0.6 g/L according to the content of the chromium in the wastewater; stirring at a speed of 300 r/min to 500 r/min for a coordination reaction for 50-70 min; adding calcium hydroxide to a solution obtained from the coordination reaction to adjust the pH value to 7.0-10.0 and performing a hydrolysis reaction for 70-100 min; after the hydrolysis reaction is finished, performing air floatation and scraping away floating slag by a slag scraping machine so that the discharged water can reach the national discharge standard. The method for processing chromium-containing wastewater disclosed by the invention can process the chromium-containing wastewater cleanly, efficiently and in a wide range, has simple equipment and high chro
Bibliography:Application Number: CN20111320761