YANGYu-ning,SANGJun-qiang,QINBing,et al.Stabilization of Biochemical Excess Sludge from Chemical Wastewater Treatment Process[J].China Water & Wastewater,2022,38(11):104-108.
Stabilization of Biochemical Excess Sludge from Chemical Wastewater Treatment Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第11期
Page:
104-108
Column:
Date of publication:
2022-06-01
- Keywords:
- chemical enterprises; biochemical excess sludge; stabilization; moisture content of mud cake
- Abstract:
- Chemical enterprises inevitably produce a large amount of biochemical excess sludge in the production process. Compared with municipal excess sludge, this kind of sludge contains more organic matter and is more difficult to treat. Therefore, the industrial sidestream test of biochemical excess sludge from a chemical plant in South China was carried out and good results were obtained by using the self-developed excess sludge stabilization technology. Under the optimal treatment conditions as follows: stabilizer to MLVSS ratio of 0.70, reaction temperature of 175 ℃ and reaction time of 2 h, the stabilization rate of the excess sludge was more than 66%, the reduction rate was more than 98.9%, and the moisture content of the mud cake was less than 60%. The pH of sludge dewatering liquid was neutral, and BOD5/COD was above 0.3, indicating that the sludge dewatering liquid was easily biodegradable. In addition, the volume of the sludge dewatering liquid was small, which could be directly discharged to the wastewater treatment plant.
Last Update:
2022-06-01