Optimization of ozonation process for the reduction of excess sludge production from activated sludge process of sago industry wastewater using central composite design.

ScientificWorldJournal · 2012 · PMC3349128 · PMID 22593666

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highly significantno p-value reported

Retention time was highly significant for biomass and COD reduction, and the microorganisms in the activated sludge have not established resistance to ozone.

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