フェノール吸着炭の再生機構および処理プロセスの検討 : 活性炭の微生物再生(第2報)

概要

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Granular activated carbon which adsrobed phenol was biologically regenerated by activated sludge. The amount of phenol which was biologically degraded was determined from the amount of oxygen uptake and the biodegradation rate of phenol in solution. Otherwise, the amount of desorbed phenol was determined from the resorption ability of the biologically regenerated carbon. Biologically degraded phenol determined from the amount of oxygen uptake and the biodegradation rate well agreed with the amount of phenol desorbed from the carbon. Activated carbon was also treated in an upflow regeneration system by circulating the mixed liqour containing activated sludge and above 60% of the adsorption ability was recovered within a few hours. This regeneration rate and the recovery of adsorption ability were quite the same as in the case when tap water was used as the regeneration agent at the same flow rate. From these results, it was concluded that the activated sludge degraded only the phenol desorbed from activated carbon and that the efficiency of the biological regeneration of activated carbon was regulated unconditionally by the desorption rate and desortion ability of substrates from the carbon. Moreover, the biological regeneration process in which the mixed liquor containng activated sludge was circulated as the regeneration agent was very useful for the regeneration of activated carbon.
1982-03-25