Abstract
Municipal WWTP often receive the industrial wastewater, including dairy sewage. The problem of sewage treatment from this sector of economy is not completely solved, especially in plants of medium and small milk processing capacity. The aim of the study was to determine the rate of change in organic compounds and nutrients in municipal wastewater with the participation of dairy products during the processing phases of SBR-type reactor in a technical scale. The study was conducted in WWTP in Sokolka. Rate of changes in the concentrations of organic compounds, nitrogen and phosphorus in wastewater during the processing phases of SBR reactor was determined. Presence of dairy sewage (13% volume participation) affected the decrease in the rate of changes in organic compounds concentrations defined as BOD 5 during all processing phases of SBR reactor. Significant influence of dairy sewage on rates of change in nitrogen and phosphorus compounds concentrations during filling, aeration, stirring, sedimentation and decantation phases, was found.
Highlights
In municipal wastewater treatment technology, the activated sludge in a batch SBR system is often used
The aim of the study was to determine the rate of change in organic compounds and nutrients in municipal wastewater with the participation of dairy products during the processing phases of SBR-type reactor in a technical scale
The facility consists of mechanical sewage treatment station
Summary
In municipal wastewater treatment technology, the activated sludge in a batch SBR system is often used. Dairy wastewater is characterized by high load of COD and BOD5. This includes dissolved and crystallized fats (glycerol, triglycerides), sugars (lactose), and protein (casein) in colloidal form and as a clot. It is possible to co-treat the dairy and municipal wastewater to achieve the desired C:N:P ratio in order to carry out highly effective denitrification and biological phosphorus removal. Analysis of the up-to-date knowledge showed that there is a lack of data on the effects of dairy sewage on the efficiency of municipal wastewater treatment in sequential chambers
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