序批式反应器处理工业废水的牛奶生物膜系统.doc

序批式反应?器处理工业?废水的牛奶?生物膜系统? Seque?ncing? batch? react?or biofi?lm syste?m for treat?ment of milk indus?try waste?water? Suntu?d Siria?nunta?piboo?na,*, Narum?on Jeeya?chokb?, Rarin?torn Larpl?aia aDivi?sion of Envir?onmen?tal Techn?ology?, Schoo?l of Energ?y and Mater?ials, King Mongk?ut’s Unive?rsity? of Techn?ology? Thonb?uri (KMUTT?), Thung?kru, Bangm?od, Bangk?ok 10140?, Thail?and bDivi?sion of Bioch?emica?l Techn?ology?, Schoo?l of Biore?sourc?es and Techn?ology?, King Mongk?ut’s Unive?rsity? of Techn?ology? Thonb?uri, Thung?kru, Bangm?od, Bangk?ok 10140?, Thail?and Recei?ved 22 Octob?er 2003; revis?ed 27 Novem?ber 2004; accep?ted 19 Janua?ry 2005 Avail?able onlin?e 21 April? 2005 Abstr?act A seque?ncing? batch? react?or biofi?lm (MSBR) syste?m was modif?ied from the conve?ntion?al seque?ncing? batch? react?or (SBR) syste?m by insta?lling? 2.7 m2 surfa?ce area of plast?ic media? on the botto?m of the react?or to incre?ase the syste?m effic?iency? and bio-sludg?e quali?ty by incre?asing? the bio-sludg?e in the syste?m. The COD, BOD5, total? kjeld?ahl nitro?gen (TKN) and oil greas?e remov?al effic?ienci?es of the MSBR syste?m, under? a high organ?ic loadi?ng of 1340 g BOD5/m3 d, were 89.3G0.1, 83.0G0.2, 59.4G0.8, and 82.4G0.4%, respe?ctive?ly, while? they were only 87.0G0.2, 79.9G0.3, 48.7G1.7 and 79.3G10%, respe?ctive?ly, in the conve?ntion?al SBR syste?m. The amoun?t of exces?s bio-sludg?e in the MSBR syste?m was about? 3 times? lower? than that in the conve?ntion?al SBR syste?m. The sludg?e volum?e index? (SVI) of the MSBR syste?m was lower? than 100 ml/g under? an organ?ic loadi?ng of up to 1340 g BOD5/m3 d. Howev?er, the MSBR under? an organ?ic loadi?ng of 680 g BOD5/m3 d gave the highe?st COD, BOD5, TKN and oil greas?e remov?al effic?ienci?es of 97.9G0.0, 97.9G0.1, 79.3G1.0 and 94.8G0.5%, respe?ctive?ly, witho?ut any exces?s bio-sludg?e waste?. The SVI of suspe?nded bio-sludg?e in the MSBR syste?m was only 44G3.4 ml/g under? an organ?ic loadi?ng of 680 g BOD