YANG Zong-zheng,ZHANG Tian-yu,WANG Yuan-pei,et al.Treatment of Coking Wastewater Based on Internet Monitoring[J].China Water & Wastewater,2021,37(19 19):98-105.
Treatment of Coking Wastewater Based on Internet Monitoring
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
19 19
Page:
98-105
Column:
Date of publication:
2021-10-01
- Keywords:
- coking wastewater; membrane bioreactor; sludge domestication; internet monitoring; cloud platform
- Abstract:
- The membrane bioreactor (MBR) was applied to treat the simulated coking wastewater and domesticate the activated sludge. The effects of the process parameters such as hydraulic retention time (HRT) and dissolved oxygen (DO) on the removal of the pollutants were investigated, and an internet monitoring system was constructed to monitor and control the operation of the equipment. After 70 days of cultivation and domestication, the MLSS in the MBR increased to 2.3 g/L, the sludge volume (SV30) increased from 1% to 34% and then tended to be stable, and the water quality index of the effluent such as COD and UV254 were stable and reached the national discharge standard. Under the conditions of influent COD of 810 mg/L and UV254 of 5.0 cm-1, the removal efficiencies of COD and UV254 were 100% and 91%, respectively, when the HRT and DO were 10 h and 3.0-3.5 mg/L. The internet monitoring data showed that the COD and oxidation-reduction potential (ORP) in the effluent were strongly correlated with each other. Therefore, a model for predicting ORP was proposed by using multiple linear regression methods. The model had higher accuracy and good stability, and could be used to manage the process and realize remote control.
Last Update:
2021-10-01