Ice Cream Wastewater Utilization Of Applied Basic Research

With demand of ice cream increasing year by year, ice cream waste water increaseing in high-speed. Nowadays we used flotation-biological as ice cream waste water treatment, which can meet the CNS of water quality standards, but this process has not effective use of sugars. This paper studied the resource utilization of ice-cream waste water process applications.After investigating the research status at home and abroad and the results of preliminary studies of our team in this field, this study used activated sludge as a hydrogen-producing strains of anaerobic fermentation and used ice-cream waste water as the substrate, studied the main ecological factors on the anaerobic fermentation of hydrogen production of intermittent operation conditions and the scale-up experiment in 5litre reactor was carried out. We got the significant study results.After flotation pretreatment, the hydrogen production volume of ice-cream was 70.97 mL, which was 4.65 times that without pretreatment.The study of the main ecological factors on the anaerobic fermentation of hydrogen production of intermittent operation conditions shows the result that, at the conditions of this study, when the initial pH in the vicinity of 6.2, the fermentation temperature is 36±1℃, inoculation volume of 0.08, and Fe concentration of 5mg/L. The maximal observed bio-hydrogen production was 98.98mL. The utilization of the glucide was 92～98%. COD removal was 49.4%.CSTR of hydrogen amplification exeperment results show that:feeding interval time of 6h, stirring speed 100r/min, influent alkalinity value of 600mg/L, the accumulation of hydrogen to maximize the amount of 7970mL.Two regression equation (1) and the equation (2) were obtained about hydrogen productionand rate (Y1) and COD removal (Y2) with relation to the independent variable, feeding interval (A), stirring speed (B) and influent alkalinity (C) in the optimization of CSTR operation condition using the response curved surface method, namely model 1 and model 2: Hydrogen production rate as a response to the value of the optimal of RSM optimization:feeding interval time of 5.73h, stirring speed 105 r/min, influent alkalinity value of 672.09mg/L; and COD removal as a response:feeding interval time of 7.85h, stirring speed 105r/min, influent alkalinity value of 759.28mg/L.The regression equation of hydrogen production ratio R2=0.9023, and the COD removal R2=0.8872, (P<0.0001). It said that these two models are effect, and have the certain significance of technics practice.The study indicated that:after pretreatment, ice-cream waste water as activated sludge substrate on hydrogen-producing is feasible, and this technology has a certainly economic efficiency.