Research on Organic Removal of Food Processing Waste-Water Based on Watershed Water Protection

Abstract

If the waste water from the production of candied fruit, as one of the non-staple foods, is not treated up to the standard and discharged directly into the surface watershed. It will inevitably cause the pollution of the watershed water and affect the safety of production and domestic water. The biodegradable index of candie waste-water is higher than 0.45 due to the large amount of sugar, which is easily biodegradable. Because of the high value of BOD5, anaerobic fermentation method was adopted. The digestible sludge from the sewage treatment plant was taken and put into the plastic bucket with a ratio of 2:28 sludge waste water. The pollution index value of waste water was significantly reduced when the reaction was 60 h. The COD in the waste-water decreased by 1480.6 mg/L, and the COD removal rate reached 49.6%. The BOD5 of waste-water decreased by 793.6 mg/L, and the BOD5 removal rate reached 50.1%. The turbidity of waste-water decreased from 110.8NTU to 69.3 NTU, the turbidity decreased by 41.5 NTU, and the turbidity removal rate of waste-water reached 37.5%.