Energy reduction of a submerged membrane bioreactor using a polytetrafluoroethylene (PTFE) hollow-fiber membrane

doi:10.1007/s11783-018-1018-y

Frontiers of Environmental Science & Engineering

2018, Vol. 12

Issue (3): 1 https://doi.org/10.1007/s11783-018-1018-y

本期目录

Energy reduction of a submerged membrane bioreactor using a polytetrafluoroethylene (PTFE) hollow-fiber membrane

Taro Miyoshi¹(

), Thanh Phong Nguyen¹, Terumi Tsumuraya¹, Hiromu Tanaka², Toru Morita², Hiroki Itokawa³, Toshikazu Hashimoto³

¹. Maezawa Industries, Inc., 5-11, Naka-cho, Kawaguchi City, Saitama 332-8556, Japan
². Sumitomo Electric Industries, LTD., 1-950, Asashironishi, Kumatori-cho, Sennan-gun, Osaka 590-0458, Japan
³. Japan Sewage Works Agency, 2-31-27, Yushima, Bunkyo City, Tokyo 113-0034, Japan

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Abstract：

The fiber length and packing density of the PTFE membrane element were increased.

The MBR was stably operated under an SAD^m of 0.13 m³·m^-²·hr^-¹.

Specific energy consumption was estimated to be less than 0.4 kWh·m^-³.

In this study, we modified a polytetrafluoroethylene (PTFE) hollow-fiber membrane element used for submerged membrane bioreactors (MBRs) to reduce the energy consumption during MBR processes. The high mechanical strength of the PTFE membrane made it possible to increase the effective length of the membrane fiber from 2 to 3 m. In addition, the packing density was increased by 20% by optimizing the membrane element configuration. These modifications improve the efficiency of membrane cleaning associated with aeration. The target of specific energy consumption was less than 0.4 kWh·m^-³ in this study. The continuous operation of a pilot MBR treating real municipal wastewater revealed that the MBR utilizing the modified membrane element can be stably operated under a specific air demand per membrane surface area (SAD_m) of 0.13 m³·m^-²·hr^-¹ when the daily-averaged membrane fluxes for the constant flow rate and flow rate fluctuating modes of operation were set to 0.6 and 0.5 m³·m^-²·d^-¹, respectively. The specific energy consumption under these operating conditions was estimated to be less than 0.37 kWh·m^-³. These results strongly suggest that operating an MBR equipped with the modified membrane element with a specific energy consumption of less than 0.4 kWh·m^-³ is highly possible.

Key words： Energy-saving Membrane bioreactor Polytetrafluoroethylene (PTFE) membrane Hollow fiber Power consumption

收稿日期: 2017-04-18 出版日期: 2018-06-10

Corresponding Author(s): Taro Miyoshi

引用本文:

. [J]. Frontiers of Environmental Science & Engineering, 2018, 12(3): 1.
Taro Miyoshi, Thanh Phong Nguyen, Terumi Tsumuraya, Hiromu Tanaka, Toru Morita, Hiroki Itokawa, Toshikazu Hashimoto. Energy reduction of a submerged membrane bioreactor using a polytetrafluoroethylene (PTFE) hollow-fiber membrane. Front. Environ. Sci. Eng., 2018, 12(3): 1.

链接本文:

https://academic.hep.com.cn/fese/CN/10.1007/s11783-018-1018-y
https://academic.hep.com.cn/fese/CN/Y2018/V12/I3/1

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