Control of Fouling Substances in Membrane Bioreactors with Intermittent Aeration

间歇曝气膜生物反应器中污垢物质的控制

• 批准号: 11650565
• 负责人: NAGAOKA Hiroshi
• 金额: $ 1.98万
• 依托单位: Musashi Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650565/
• 关键词: Membrane Bioreactor; Extracellular Polymeric Substances; Membrane Fouling; Intermittent Aeration; Nitrogen Removal; Submerged Membrane Bioreactors; MF Membrane; 浸漬型膜分離活性汚泥法; 菌体外ポリマー; ゲル クロマトグラフィー

The performance of the submerged membrane separation activated sludge process with intermittent aeration was investigated in a laboratory scale experiment changing organic loading rate and intermittent aeration cycle. A rectangular PVC tank was used as an aeration tank, in which a flat-sheet type Micro-Filtration membrane made of poly-olefin with the pore size of 0.2μm was submerged. Organic loading rate to the reactor was set at 0.3 and 0.8 g-TOC/L/day. C/N ration in the feed was set at around 5.0 for every condition. Aeration cycle was changed from 10min-10min (aeration - stop) to 120min-120min in different organic loading conditions. Flux through the membrane was set at 0.25m/day. Membrane fouling proceeded rapidly in 0.8 g-TOC/L/day conditions. However, when organic loading rate was 0.3 g-TOC/L/day, bacterial metabolic substances were degraded rapidly compared to the production thereby decreasing viscosity in mixed liquor. Nitrogen removal rate was between 60% and 80% for 0.8 g-TOC/L/day loading, and between 50% and 65% for 0.3 g-TOC/L/day loading. And the nitrogen removal was highest in 40min to 60min aeration cycle conditions. Too short aeration cycle did not result in sufficiently long anoxic periods for denitrification while too long cycle resulted in unnecessary anaerobic periods after depletion of nitrate. Intermittent aeration was effective also for decreasing viscosity in mixed liquor.

通过改变有机负荷和间歇曝气周期对间歇曝气浸没式膜分离活性污泥法的性能进行了小试研究。曝气池采用矩形聚氯乙烯曝气池，在曝气池中浸入孔径为0.2μm的聚烯烃制成的平板型微滤膜。反应器的有机负荷分别为0.3和0.8g-TOC/L/天。在每种条件下，饲料中的C/N比都设定在5.0左右。在不同的有机负荷条件下，曝气周期从10min-10min(曝气-停止)到120min-120min。膜通量设定为0.25m/d。在0.8g-TOC/L/天的条件下，膜污染发展迅速。然而，当有机负荷为0.3g-TOC/L/天时，细菌代谢物质的降解速度比产量快，从而降低了混合液的粘度。对0.8g-TOC/L/d负荷和0.3g-TOC/L/d负荷，脱氮率分别为60%~80%和50%~65%。曝气周期为40~60min时，脱氮效果最好。曝气周期过短不会产生足够长的反硝化缺氧期，而过长的曝气周期会导致硝酸盐耗尽后不必要的厌氧期。间歇曝气对降低混合液粘度也是有效的。

项目成果

膜分離活性汚泥法における流入負荷パターン操作による膜目詰まり制御の検討

膜分离活性污泥法中通过控制流入负荷模式控制膜堵塞的研究

• 发表时间: 2000
• 期刊: 土木学会第27回関東支部技術研究発表会講演概要集
• 作者: 濱谷慎一郎;長岡 裕;河野聖子;高森雄
• 通讯作者: 高森雄

濱谷慎一郎,長岡裕,河野聖子,高森雄: "膜分離活性汚泥法における流入負荷変動が膜目詰まり原因物質に及ぼす影響"土木学会第55回年次学術講演会講演概要集. VII. 7-40 (2000)

Shinichiro Hamaya、Yutaka Nagaoka、Seiko Kono、Yu Takamori：“膜分离活性污泥法中流入负荷波动对膜堵塞物质的影响”日本土木工程学会第 55 届学术会议摘要 VII. 2000)

膜分離活性汚泥法における断続的な流入負荷が目詰まりに及ぼす影響

间歇进水负荷对膜分离活性污泥法堵塞的影响

• 发表时间: 2001
• 期刊: 第35回日本水環境学会年会講演集
• 作者: 浜谷慎一郎;長岡 裕;鈴木陽子
• 通讯作者: 鈴木陽子

Fouling Mechanism Considering Production of Utilization- and Biomass- Associated Extracellular Polymers in Membrane Bioreactor

考虑膜生物反应器中利用和生物质相关的细胞外聚合物生产的污染机制

• 发表时间: 2001
• 期刊: IWA 2nd World Water Congress Preprints B1132
• 作者: Nagaoka;H.;Kono;S.;Hamaya;S.
• 通讯作者: S.

Effect of intermittent aeration on nitrogen removal and fouling in one-reactor-membrane bioreactor

间歇曝气对单反应器-膜生物反应器脱氮及结垢的影响

• 发表时间: 2001
• 期刊: Proc.Annu.Conf.Japan Soc.Wat.Env.
• 作者: Nemoto;H.;Nagaoka;H.;Suzuki;A.
• 通讯作者: A.