Research On The Treatment Of Methanol Wastewater By Hydrolysis_Anaerobic Process

Harbin Gasification Plant is the state's key projects, charged with the Harbin city gas supply task. Since June 1993 the trial operation, it has consistently regarded as a center for environmental work. However, the Harbin city gas consumption has increased, quality of coal is decrease, resulted in thewastewater quality, stood beyond the original gas and biochemical devices wastewater treatment capacity, causing wastewater of discharge gas below the standards.Methanol, as an important organic chemical raw materials, is widely used in the chemical industry, pHarmaceutical industry, textile civilian industries and the transport sector of the national economy and other sectors. With some domestic methanol production plants were in operation, the threat to the surrounding environment is increasingly serious. Methanol wastewater particularly satisfied that the surrounding environment of sewage a threat is obvious. Therefore, how to the solve the solution to the ecological environment, and the problem of wastewater pollution is the urgent task for the gasification plant in Harbin an at present.The thesis made an extensive, in-depth and systematic research of the treatment of high concentration methanol wastewater from Harbin Gasification plant by hydrolysis_anaerobic process, comlpeted the activated of sludge and the start of the system by the engineer_testing studied the operating parameters of the treatment of this kind of wastewater by hydrolysis_anaerobic process in-depth discussed the operating effectiveness, efficiency, and control factors of each unit, got the summary conclusions on the future operation of debugging and other related anaerobic treatment of the design of the project anaerobic technology for the practical application of a reliable theoretical basis, technical methods and means to resolve the problem. At last we got following conclusions:The hydrolysis_anaerobic process is start by anaerobic sludge in 25 days, the removal rate of COD is above 90%; The hydrolysis tank got the ability of anti_impact and regulation of the quality and quatuty of wastewater; The cyclone-flow distribution water device and short distance three-pHase reactor is used in the external circular anaerobic reactor, and the effect of mixtion is perfect; The best range of pH is 7.1～7.3,and the best range of temperature is 30℃～34℃.The studies of methanol wastewater treated offered dependadie theortical evidences, thnical methods and realized ways on the future operation of debugging and other related anaerobic treatment to the design of the project related to the operation, and high concentrations of wastewater treatment and play a very good and the exemplary role of guiding significance, which had very important theoretical value and indication function in the development and practices of methanol wastewater tyeatment by anaerobic thnology, and would be a good demonstation in the industry.