Treatment of leachate from municipal solid waste incineration plant by expanded granular sludge bed reactor
EGSB反应器处理城市生活垃圾沥滤液

A lab-scale expanded granular sludge bed(EGSB) reactor was used to treat the leachate from municipal solid waste(MSW) incineration plant.The results showed that EGSB was effective in removing the organic pollutants of the leachate under mesophilic condition.COD removal reached 94.2% when the influent COD was around 55 000 mg/L and the organic loading rate(OLR) was 22.8 kg COD/(m3·d).When the COD of influent was around 72 000 mg/L,OLR should be decreased to 18.2 kg COD/(m3·d) so as to guarantee the stable of the reactor.Under this condition,COD removal could reach around 88%,and the average COD concentration in effluent was 9 103 mg/L.The leachate and the effluent from EGSB comprised mainly small molecules(<4 kDa),which accounted for 76.5% and 74.4%,respectively.Dissolved organic matter(DOM) could be effectively degraded in EGSB reactor.And the removal efficiency for macromolecular organics was higher than that for micromolecular organics.