On the comprehensive treatment of coal chemical industry wastewater
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The current environmental situation is extremely severe. An important factor affecting the development and approval of the coal chemical industry is the comprehensive utilization of water resources as well as the treatment of wastewater； Please pay attention to the treatment technologies for coal chemical wastewater.
Coal chemical industry wastewater is quite complex, with high COD levels, making the treatment of organic wastewater challenging. When planning, consider using coal slurry gasification to treat organic wastewater, thereby reducing the difficulty of wastewater treatment.
Pay attention to the treatment technologies for coal chemical industry wastewater
Difficulties in dealing with gasification wastewater: 1. The concentration of phenolic substances is around 800–1200 mg/L, which has a significant inhibitory effect on biochemical systems. 2. The wastewater contains a high concentration of ammonia nitrogen, with significant fluctuations. 3. Recalcitrant organic compounds: The recalcitrant organic compounds in wastewater mainly include quinoline, isoquinoline, methylquinoline, indole, pyridine, biphenyl, imidazole, carbazole, and alkylpyridines, which are difficult to biodegrade. 4. ** in wastewater is highly toxic; therefore, it is necessary to pre-treat ** in the wastewater. 2.2 Wastewater composition and its COD equivalent (raw water diluted 4 times)