Characterized by high level of salinity, organic concentration and biodegradability, mustard tuber wastewater was chosen to be treated by anaerobic sequencing batch biofilm reactor (ASBBR) in this study. Previous researches have proved that the treatment performance of ASBBR is temperature and salinity depended. Orthogonal experiments were carried out to assay the more specific relationship of temperature, salinity and effluent COD. High salinity showed inhibition towards the treatment effect of microorganisms, while suitable temperature played a catalytic role. Under appropriate condition, the COD removal rate could reach 95.1%. However, under adverse condition, the COD removal efficiency could be as low as 42.2%. The linear regression equation of temperature (T), salinity (ñ) and effluent COD was: COD=1515+ 0.072ñ-69.1T. The expression could be a guide for engineering design and operation.
Mustard tuber wastewater, ASBBR, temperature, salinity, activated sludge
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