Biochemical treatment

A large amount of organic pollutants have been removed from the pretreated production wastewater, but there is still a small amount of residue, which requires further in-depth treatment of the wastewater. First, the A/A/O technology is used to treat the aqueous phase to reduce the COD value in the aqueous phase. The A/A/O technology adds an anaerobic microbial treatment section on the basis of the traditional A/O technology, which can degrade biphenyl, quinoline and other organic substances into chain chemicals through physical sedimentation, To achieve the purpose of separation and removal, chain chemicals can be further decomposed into broken chain chemicals. This technology is very important for wastewater pretreatment. In addition, SBR technology can be used. SBR technology is a sequencing batch activated sludge technology, which uses microorganisms in the activated sludge to produce aerobic and anaerobic reactions in the wastewater, but focuses more on the removal of ammonia nitrogen compounds, and combines the physical sedimentation method to remove organic pollutants in the aqueous phase.

Membrane technology

At present, the membrane separation technology in the world gradually realizes the treatment of oily sewage, which can directly remove the emulsified oil and dissolved oil in the sewage, and can also achieve the purpose of desalination. During the treatment process of microfiltration or ultrafiltration technology, the main characteristics of oily sewage are: no agent is added, it belongs to the physical separation method, and will not produce sludge. Moreover, the change of oil concentration in raw water has strong adaptability, which can promote the recycling application of sewage. The influent process should be effectively treated, and the membrane should be subject to certain sterilization and cleaning treatment. The simple working principle of oil removal is that the size of oil droplets of emulsified oil will be larger than that of membrane pores, and the dissolved oil will be more hydrophilic due to the interaction between membrane and solute molecules, which will reduce the permeability of free oil, and the water flux will also increase. The specific form of oil in oily sewage is the main basis for membrane selection. If the oil in the water body has relatively high surface activity, the oil droplets will gradually form stable emulsified oil and dissolved oil, and the oil products will be better bonded. At this time, hydrophilic or lipophilic ultrafiltration membranes should be selected as needed to achieve separation treatment. At this time, the aperture should be far less than 10, Because ultra-fine membrane pores can promote demulsification or condensation of oil droplets.

Actively develop the second water source

In a coal base with a relatively typical nature, there are many types of water resources that can be used, such as mine water, natural precipitation and groundwater. Therefore, by following the basic principle of water cycling, the characteristics of water recycling can be deeply explored, and a more reasonable underground reservoir can be created, which helps the coal chemical enterprises to implement various production operations with sufficient water resources as support. Among the above applicable water resources, mine water has the most available water and relatively high quality. Therefore, it can be made into high-quality coal chemical water to support various production operations implemented by new coal chemical enterprises through effective research and development of new technologies for combination of mine water with high salinity and high turbidity, and reasonable improvement and optimization of corresponding process conditions, It will help promote the overall efficiency of the corresponding enterprises.