The problem of waste water treatment of coal glycol is solved

ADN anaerobic anti-nitrification and improved AO combination biological treatment process through the identification
recently, Shanghai Yanji Environmental Protection Technology Co., Ltd. independently developed synthetic gas glycol production wastewater biochemical treatment technology in Beijing through the China Coal Industry Association organized scientific and technological achievements identification. Jin Chung, a member of the Chinese Academy of Engineering and a professor at Tsinghua University, served as the chairman of the committee of experts, said that the process combination called ADN anaerobic anti-nitrification and improved AO combination biological treatment to fill the gap in the biochemical treatment process of synthetic gas glycol high nitrate wastewater, is the first in China, in the field of synthetic gas glycol wastewater biochemical treatment in the international leading level, it is recommended to promote the application as soon as possible.
production wastewater treatment of synthesized gas glycol is one of the difficulties in the field of coal chemical wastewater treatment
China
. In view of the high nitrate and high organic waste water of synthesized glycol, the environmental protection project has developed the independent proprietary technology of ADN anaerobic anti-nitrification and improved AO combination biological treatment process. The complete set of technology in Puyang Yongjin 200,000 tons / year of synthetic gas glycol project industrial application, can reduce the concentration of nitrates in wastewater from 3000mg / L to 20mg / L below, COD concentration from 7000mg / L to below 150mg / L; With good water quality, small footprint, strong impact-resistant load, low operating and maintenance costs, can be widely used in synthetic gas glycol production wastewater treatment and other high nitrate, high organic waste water treatment.
Xuewen, deputy general manager of environmental protection, said that the waste water discharged during the production of coal glycol contains nitric acid, and high COD, high salt content, high toxicity, low pH, treatment is very difficult. At present, this kind of sewage is treated by evaporation method and other materialization methods, or simple anti-nitrification pre-treatment into the plant sewage system dilution treatment, high treatment costs, low removal efficiency, unstable operation.
this combination process successfully solves the problem of coal glycol wastewater treatment. The application of ADN reactor can eliminate low pH, high toxicity and other adverse factors to biological reactors, but also de nitride and removal of COD, de nitride and decarbonization two process segments into one, and through the new modified AO process after the further removal of COD and de nitrous.
" compared to other processes, this combination process ton of hydropower consumption of 3 to 4 kW, investment costs can be reduced by about 45%, operating costs can also be reduced by 20%, land area reduced by more than 70%. He Wei, technical director of environmental protection, told reporters.
, coal glycol has become the key direction of coal chemical industry development, the total planning capacity reached 29.16 million tons / year. However, the operating rate of many projects that have been put into operation is only maintained at a low level, in addition to the production process itself, wastewater treatment and other environmental factors are also important reasons.
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