title: Comparison of high pressure and ambient pressure aerobic granulation sequential batch reactor processes.
abstract: Due to granule size, substrate and oxygen become limited in the core of granules leading to cell lysis at the core. Loss of granule stability is still a major barrier for practical application of AG. Compared to ambient pressure condition (AP), operation of AG under high pressure (HP) is a favorable condition for formation and stability of granules. Experimental results show that granulation was facilitated under HP condition. MLSS and size of granules under AP system are higher than those under HP system. However, SS of effluent in AP is higher than those in HP and is consisted mainly of flocculent sludge. Longer SRT and lower biomass yield are obtained in HP system, indicating that less sludge will be produced in HP system. HP system can operate at high nitrogen loading. Complete nitrification was observed earlier in HP, indicating that the growth of NOB was facilitated under high dissolved oxygen.
authors.affiliation: Department of Water Resources and Environmental Engineering, Tamkang University, 151 Yingzhuan Road, Tamsui District 25137, New Taipei City, Taiwan.
authors.forename: Yang-Min
authors.initials: YM
authors.lastname: Liang
authors.forename: You-Lan
authors.initials: YL
authors.lastname: Yang
authors.forename: Yuan-Wei
authors.initials: YW
authors.lastname: Chang
authors.forename: Jie-Yuan
authors.initials: JY
authors.lastname: Chen
authors.forename: Chi-Wang
authors.initials: CW
authors.lastname: Li
authors.forename: Jui-Hsuan
authors.initials: JH
authors.lastname: Yu
authors.forename: Shiao-Shing
authors.initials: SS
authors.lastname: Chen
mesh_terms: D000332:Aerobiosis; D061249:Batch Cell Culture Techniques / Q000295:instrumentation* / Q000379:methods*; D001673:Biodegradation, Environmental; D001704:Biopolymers / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology*; D011312:Pressure; D012722:Sewage / Q000382:microbiology*; D013997:Time Factors; D014865:Waste Disposal, Fluid
chemical_list: D001704:Biopolymers; D012722:Sewage