Anaerobic Filter + Biological Contact Oxidation Process Trimethylolpropane Wastewater Treatment Technology Research

A large chemical plant in Jilin in the course of development in the past few decades, made great contributions to China’s reform and opening up and economic development. Considerable development as the business, the production range of products and production has greatly expand and improve. At the same time, in the process of chemical products, also produce large amounts of industrial waste water. The trimethylolpropane wastewater is representative of a high concentration of refractory organic wastewater, its main ingredients include formaldehyde, butyraldehyde, methanol, butanol, and trimethylol propane and other 18 kinds of main characteristics of pollutants in waste water. For high concentrations of refractory organic wastewater treatment, is the recognized technical problems at home and abroad the sewage treatment sector. For this type of wastewater in the existing treatment process, the present study more coking wastewater, petrochemical/oil wastewater, pharmaceutical wastewater (including traditional Chinese medicine wastewater), chemical wastewater paint wastewater, textile/dyeing wastewater industry-based wastewater. More mature in the sewage treatment process, the biological treatment process is more economical running more stable process, multi-find information, mainly for the high concentration organic wastewater intractable status quo, developed a biological treatment processes-anaerobic filter+biological contact oxidation process.Used in this paper is the first anaerobic method to remove high concentrations of refractory organics in wastewater, CODcr wastewater completely reduced to 500mg/1 following the double-pool with the method and then through the biological contact oxidation, The test trials by the number of ordinary sewage, laboratory cultures of bacteria can be better to complete the expected target. During the experiment, a total of 261 set of experimental data, the maximum influent CODcr 20483mg/1, the effluent of CODcr 100mg/1, CODcr removal rate can reach 99.51%. Species impact of the late stage, were conducted to test 54 times, the maximum influent CODcr 46198mg/1, the effluent of CODcr 99mg/1, the removal efficiency of 99.79%, indicating that the bacteria able to tolerate high concentrations of organic wastewater of up to 45000mg/ limpact. These tests prove that this method is feasible, can be effectively removed CODcr sewage to sewage effluent indicator of the chemical plant requirements. But at the same time, this test does not mean that industrialization of the treatment effect is limited to laboratory data.