The Synthetic Utilize Technology Research On Hogwash Fat In Town Wastewater

Hogwash fat containing large quantity of animal and vegetable oil adds difficulty to be treated with, hogwash fat also causes serious environmental pollution and resource waste by sluiced directly. In this paper, integrated developing situation of present town hogwash fat process technology, Designed economical and rational new process about hogwash fat, study on pretreatment, hydrolysis, direct hydrogenation and wastewater control process, also compared and analyzed the economical technology with traditional process.According to the study tests, the results show:Pretreatment, the fittest adding water capacity is 30 percents, adding acid capacity is pH 2 to 3.Hydrolysis, use water as catalyst directly, adapt to complicated ingredient hogwash fat, select the process conditions are: adding water capacity is 30 percents, pressure is 3.5 MPa. Hydrogenation temperature, according crossing tests results, we obtain that the best hydrogenate temperature is 180°C, also fond that the heating time before add catalyst is same important, when heating time long the hydrogenate ratio decline apparently, the best heating time is 25mins;Catalyst, on the conditions of pretreatment thoroughly and in the testing environs, 0.25percents catalyst quantity is fittest to hydrogenation; Stirring, mixed thoroughly about catalyst and liquid should pledged, the best stir speed is 900 r/min; Pressure, according the results of tests, the 1.2MPa is the best pressure condition.Wastewater after separated oil from hogwash fat control used compound process including air flotation, detest oxygen and SBR. After flow adjust pool and air flotation pool, on the conditions of test cycle with SBR process, when input water COD consistency is 800 mg/L, oil consistency below 200 mg/L, the output water quality can attain the standard of 2thlevel(GB8978-1996).Compared with traditional process from products economic benefits analyze based on experiments and amplify tests, the results show that new process has obvious superiorities from investment capital quota, raw material, economic benefits, orbit cost and products quality. It has high apply worthy.These studies use hydrolysis first then hydrogenate new process to treated hogwash fat to produce glycerine, oleic, and stearic acid etc high benefits industry material. Form a good benefits new profession, not only tune waste into treasure,but also eliminate the pollution of hogwash fat. This study process has obvious superiorities compared with traditional process from products quality energy consume waste water treatment capital investment quota and economic benefits different sides, it has high popularize apply worthy.