The Design Of Fifty Thousand Tons Of Cassava Ethanol Wastewater Wastewater Treatment Plant

In recent years, gradually increasing social demand for alcohol, especially theapplication of fuel ethanol demand led to an explosion of social alcohol． But thealcohol industry waste of raw material resources and environmental pollution hasgradually become a limiting alcohol industry rapid development of importantfactors． Country for serious pollution of the environment has also given a strictalcohol waste management, has invested more and more manpower and resources．The alcohol industry is heavily polluted industries, especially in the production ofcassava as raw material in the process of alcohol, they will have high concentrations oforganic wastewater, mainly from Zhengliu tower discharge of distiller’s grains,production equipment wash water, cooling water and other wastewater． Lees wastewhich is the major pollutants in wastewater, such as to produce1ton of cassavaalcohol need to discharge10to13tons lees． Treatment of such wastewater can bedifficult, often producing biogas by anaerobic, aerobic and other technology to ensurethe water reuse or discharge, etc． But really do effluent compliance, wastewatertreatment investment and running costs are very provincial and wastewater recycling isnot much higher efficiency, waste water treatment business of alcohol productionenterprises and the environmental community is the subject of long way to go．The main subject is the annual output of fifty thousand tons of sewage cassavaethanol plant preliminary design, the construction of a large organic load, high removalrate of organic matter, save money and resources, automation of high labor intensity ofthe alcohol wastewater treatment plant．Workshop pre-UASB reactor using anaerobic treatment-Sec biological contactoxidation process combined approach, to strengthen pre-treatment process in part, theuse of anaerobic digestion of high organic load, water quality more stable UASBreactor technology, while, in order to increase processing efficiency in the UASBreactor in series after a set of process Sec biological contact oxidation process, theprocess further increases the efficiency of the oxidation process, the maximumreduction in the processing After the water of the water quality of COD, BOD valueand improve the quality of water quality, the whole process and consider the heatbalance, SS balance．This is not only great reduce the area of anaerobic and investment and operatingcosts,improve service life of the anerobic system equipment;and anaerobic treatment stage to ensure the removal and effluent concentrations． There is also the wholeprocess by-product of biogas production, reducing capital investments by businesses,save money．Into account the specific circumstances of the workshop and the process of plantplanning, plant layout, material balance, construction layout, structural design,electrical design, lighting, drainage, ventilation, equipment selection, environmentalprotection and other aspects of design and research, and initial development ofworkshop management agencies, and labor staffing Capacity． The paper also worksfor the entire project investment and operating costs were calculated and analyzed, andfinally, after a reasonable technical research and analysis show that: The project isabout17．45million yuan of fixed assets investment, annual profit of12million yuan,investment recovery period is2years.