Experimental Study On The Treatment Of The Brewery Wastewater With Hydrolytic Acidification+SBR

The wastewater from beer production is generous and contains a large of organic matter, it will result in water pollution if discharged into natural water body without treatment. Currently,it's hard to find any related report of the brewery wastewater in domestic or overseas.This paper has focused on this present situation:firstly,we established a small-scale test model of hydrolytic acidification + SBR reactor in the laboratory;then,the treatment of brewery wastewater were investigated to explore the feasibility of beer wastewater treatment in the application;Finally,We analyzed the removal efficiency and variational rule of COD,NH₄⁺ -N,PO₄^3- index in order to draw the best design and process control parameters of the model.The main research results are follows:1.The best hydraulic retention time(HRT)-12h was obtained by optimizing parameters of hydrolytic acidification.Under this condition,when the concentration of the COD in inlet water was 1537mg/L-1980mg/L,the concentration of COD in outlet water stayed between 745mg/L-1024mg/L,the rate of COD removal capacity remained at 45%-52%,and increased biodegradability to create favorable conditions for further treatment.2.The optimal operating parameters of the SBR section that were obtained by experimental study were:The pH value was between 6.5-7.0,the temperature was 21-24℃, the concentration of activated sludge was in the 3500-4000mg/L,the cycle of operation was 4h,including 0.5h inlet water period,2h aeration period,1h precipitation period,5min drainage period,25min idle period.In this condition,the rate of COD removal capacity remained at between 96.32%-91.17%;the rate of NH₄⁺ -N removal capacity was 92%-98%,the efficiency of PO₄^3- removal capacity was higher than 99%.3.The operation parameters of this combined process have also been optimized.The results were the same as the optimal operating parameters in hydrolytic acidification and SBR paragrapH.When the system was stable running under the operation conditions,the COD concentration of influent was 1537mg/L-1980mg/L;The NH₄⁺ -N concentration of water varied between 24.4mg/L-34.1mg/L,with an average concentration of 30.3mg/L;And the PO₄^-3 concentration was between 7.5mg/L-18.2mg/L.Average COD concentration of effluent was 50mg/L,and the average removal rate was 97.05%on average;The NH₄⁺ -N concentration of effluent was in the range of 0.6 mg/L-2.0mg/L,and the average removal rate was 96%;The PO₄^3- concentration of effluent came following 0.15mg/L,and the removal rate reached 99.66%-99.18%.A stable quality of outflow was reached under variable wastewater quality and increased quantity of wastewater of inflow,which showed that the system exhibited a good shock load resistance capability and good stability.