ZHUO Xing-xing,YIN Xing-xin,SHI Shuo-hui,et al.Effect of Load on Dewatering Efficiency of High Salinity Sludge Conditioning System with Acidithiobacillus thiooxidans[J].China Water & Wastewater,2020,36(23 23):27-30.
Effect of Load on Dewatering Efficiency of High Salinity Sludge Conditioning System with Acidithiobacillus thiooxidans
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
23 23
Page:
27-30
Column:
Date of publication:
2020-12-01
- Keywords:
- high salinity sludge; Acidithiobacillus thiooxidans; conditioning; deep dewatering; extracellular polymeric substance (EPS)
- Abstract:
- In view of poor dewatering performance of residual sludge produced by biological treatment of high salinity wastewater, the high salinity sludge conditioning system with Acidithiobacillus thiooxidans was constructed, and the effect of load on deep dewatering efficiency of the system was investigated. When the load was 0.5 gMLSS/(L·d), 1.0 gMLSS/(L·d) and 1.5 gMLSS/(L·d), the pH value of the reactor decreased from 3.86 (before conditioning) to 1.46, 1.99 and 2.38, respectively. Water content of the sludge cake decreased from 70.1% to 60.3%, 61.8% and 64.3%. Bound water content of the sludge decreased from 8.41 g/gDS to 1.21 g/gDS, 1.28 g/gDS and 1.34 g/gDS. Extracellular polymeric substance (EPS) content decreased from 93.22 mg/gVSS to 16.35 mg/gVSS, 17.45 mg/gVSS and 19.64 mg/gVSS. The effect of load on LB-EPS content was not significant, but it had a significant effect on content of TB-EPS.
Last Update:
2020-12-01