Research status and prospect of wastewater treatment from coal to methane process

In order to realize the zero discharge of wastewater from coal to methane project,the primary wastewater treatment processes,such as phenol ammonia recovery,organic wastewater treatment,salt containing wastewater treatment,concentrated brine treatment,high concentration brine treatment,crystal salt treatment,and their characteristics were systematically summarized and analyzed.Finally,the development trend of zero discharge treatment technology was overviewed.In the future,the producing system and water supply system should be combined to optimize the process and to develop new approach for wastewater treatment and utilization.Such process can reduce wastewater and improve the recovery efficiency and stability of phenol ammonia recovery process,and even cut down operating costs.The anti-virus biochemical technology,high-performance anti-pollution film materials,high recovery rate and high purity salt crystallization process should be developed.The standard for coal chemical wastewater crystallization salt product should be formulated.