Assessment of the calcium peroxide efficiency for removing phosphates from wastewater
T.S. Smirnova, D.A. Guskov, A.A. Alekseev
Section: Ecologization of industry
The standard for the phosphate ions (phosphorus) content in the discharge of treated wastewater into surface water bodies was established in the Russian Federation only in 1991. This standard for treated wastewater disposal into fishery waters is 0.2 mg/L. According to numerous studies, the average concentration of phosphorus phosphates entering surface waters along with wastewater is about 1.57 mg/L. This value exceeds the established standard by more than 7 times. Due to the fact that phosphorus is the main biogenic element (along with carbon and nitrogen) its increased content can lead to eutrophication of the surface waters. Therefore, the search for effective solutions to the phosphate ions removal during wastewater treatment is relevant. The main methods for removing phosphate ions from wastewater are biological, chemical (reagent) methods and complex biological-chemical methods. Reagent methods are the most promising. At the same time, the adding of auxiliary reagents during wastewater treatment can lead to secondary pollution. Therefore, the search for new effective and safe reagents for phosphate ions removing from wastewater is a currently important research issue. The paper presents the results of a study on the possibility of using calcium peroxide to remove phosphate ions from domestic wastewater, case-study of Kolomna treatment facilities. The received efficiency of phosphate ions removing phosphate ions from wastewater using calcium peroxide was nearly 90%. The dependence of changes in the chemical oxygen demand value on the concentration of calcium peroxide in wastewater was also determined.
ISSN 1995-4301
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