Process configurations adapted to membrane bioreactors for enhanced biological phosphorous and nitrogen removal
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- 作者：Lesjean ; Boris ; Gnirss ; Regina ; Adam ; Christian
- 关键词：Enhanced biological phosphorous removal (Bio-P) ; Membrane bioreactor (MBR) ; Microfiltration ; Immersed membrane ; Post-denitrification
- 刊名：Desalination
- 出版年：2002
- 出版时间：September 10, 2002
- 年：2002
- 卷：149
- 期：1-3
- 页码：217-224
- 全文大小：652 K
文摘
Enhanced biological phosphorous (Bio-P) removal process was adapted to membrane bioreactor (MBR). One bench-scale pilot plant (BSP, 200–250 L) and two medium-scale pilot plants (2//MSP, 1000–3000 L each) were operated under several configurations, including pre-denitrification and post-denitrification without addition of carbon source, and two solid retention times (SRT) of 15 and 26 d, in parallel to the full-scale Bio-P removal activated sludge plant of Berlin-Ruhleben (12–18 d SRT). The trials showed that efficient Bio-P removal can be achieved with MBR systems, in both pre- and post-denitrification configurations. Bio-P dynamics could be clearly demonstrated through batch-tests, on-line measurements, profile analyses, P-spiking trials, and mass balances. High P-removal performances were achieved even with high SRT of 26 d (around 9 mgP/L was removed with P/TS
2.6 % ). Under similar operation conditions of sludge age and mass organic load, the MBR system achieved slightly higher P-removal than the conventional technology. This was due to the rejection of particles and colloids through the microfiltration membrane. When spiking with phosphate, high Bio-Premoval of up to 35–40 mg/L could be achieved without addition of external carbon source, and P/TS stabilized around 7.5 % .
2.6 % ). Under similar operation conditions of sludge age and mass organic load, the MBR system achieved slightly higher P-removal than the conventional technology. This was due to the rejection of particles and colloids through the microfiltration membrane. When spiking with phosphate, high Bio-Premoval of up to 35–40 mg/L could be achieved without addition of external carbon source, and P/TS stabilized around 7.5 % .