首页|Electrocoagulation pretreatment reduced the synergistic inhibition of anaerobic granular sludge by micro stickies and Ca2+ and delayed the calcification of granular sludge
Electrocoagulation pretreatment reduced the synergistic inhibition of anaerobic granular sludge by micro stickies and Ca2+ and delayed the calcification of granular sludge
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NSTL
Elsevier
The presence of micro stickies and Ca2+ in papermaking wastewater leads to a decrease in anaerobic granular sludge (AnGS) digestion performance and granular sludge calcification. This study, evaluated the effects of micro stickies and Ca2+, combined or alone, and following electrocoagulation pretreatment, on AnGS calcification and anaerobic digestion in wastewater from old corrugated container recycling. The results showed the degradation rate of organic matter, extracellular polymeric substances(EPS) content, specific methanogenic activity (SMA) and biological activity was improved noticeably via electrocoagulation pretreatment with micro stickies and Ca2+. Further, the pre-removal of micro stickies and Ca2+ not only enriched the functional microorganisms but also delayed the calcification of AnGS thereby causing a significant reduction in the damage of AnGS. Therefore, as a promising way to minimize the harmful effects of micro stickies and Ca2+, electrocoagulation pretreatment provides a new idea for delaying the calcification of AnGS.
NSTL
Elsevier
