ZHAONing-hua.Case of a WWTP for Coal-to-Methanol Production in Ningxia[J].China Water & Wastewater,2023,39(24):140-144.
Case of a WWTP for Coal-to-Methanol Production in Ningxia
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第24期
Page:
140-144
Column:
Date of publication:
2023-12-17
- Keywords:
- coal-to-methanol wastewater; high-efficiency softening sedimentation tank; enhanced biological nitrogen and carbon removal reactor
- Abstract:
- The wastewater from coal-to-methanol production has the characteristics of high ammonia nitrogen, high total nitrogen, high hardness, high suspended matter and low carbon to nitrogen ratio, which has few engineering cases for its treatment and water reuse. A coal-to-methanol production wastewater treatment plant (WWTP) in Ningxia adopts the treatment process of first-stage high-efficiency softening sedimentation tank, QWSTN enhanced biological nitrogen and carbon removal reactor, secondary sedimentation tank, second-stage high-efficiency softening sedimentation tank, and V-type filter tank. The total investment of the project is 65 million yuan. The operation results show that the process has a significant effect on the treatment of wastewater from coal-to-methanol production, and the effluent quality of the system can meet the design requirements stably. When the average treatment water quantity of the system is 418 m3/h and the average influent COD and ammonia nitrogen are 798.03 mg/L and 111.06 mg/L respectively, the average effluent COD and ammonia nitrogen are 22.52 mg/L and 0.41 mg/L respectively. When the average influent total hardness (CaCO3) of the first-stage high-efficiency softening sedimentation tank is 1 842.53 mg/L, the average effluent total hardness of the system is 113.37 mg/L. At this stage, the system’s electricity and chemical operating cost is 4.09 yuan/m3.
Last Update:
2023-12-17