초록
<P><B>Abstract</B></P> <P>The biohydrogen production using the disintegrated and dissolved sludge by gamma irradiation was studied. The experimental results showed that gamma irradiation and irradiation combined with alkali pretreatment could disintegrate and dissolve waste activated sludge for biohydrogen production. The alkali-irradiation treatment of the sludge at pH=12 and 20kGy achieved the highest disintegration and dissolution, i.e., it could destroy the cell walls and release organic matters (such as soluble COD, polysaccharides and protein) into the solution. The disintegrated sludge could be used as a low-cost substrate for biohydrogen production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The waste activated sludge could be disintegrated by gamma irradiation. </LI> <LI> The disintegrated sludge could be used for biohydrogen production. </LI> <LI> Combined alkali-irradiation treatment achieved the highest solubilization of sludge. </LI> </UL> </P>