TORAY MBR
Instruction Manual
06-G-MB2-NHPAF-220801
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I.
INTRODUCTION
Toray MBR is the submerged membrane module suitable for the membrane bioreactor
(MBR) that has been developed based on the polymer science and the membrane
fabrication technologies accumulated for a long time in Toray Industries, Inc.
"NHPA Series" is a new model of NHP-MBR module equipped with thin membrane elements
having higher packing density, while reliable performance of Toray PVDF membrane has
been kept unchanged. "NHPA Series" is equipped with fine-bubble air diffusers which
significantly reduce the daily cleaning operation of air diffusers.
This manual explains MBR's features and describes the specifications of "NHPA Series" and
its safe operations including installation, operation, maintenance procedures and peripheral
equipment. Operators should thoroughly read this manual to ensure stable operation.
1. Features of MBR
The process flow of the conventional activated sludge system (CAS) and MBR are shown in
Fig.I-1 and Fig.I-2, respectively.
MBR provides the following advantages:
(1) Small Footprint
Unlike CAS, MBR separates sludge within an aeration tank using membranes, thus
eliminating the space for the sedimentation tank. Also with membrane, MBR can hold higher
concentration of activated sludge in the aeration tank, so its volume can be reduced. As a
result, MBR requires a smaller footprint compared to CAS.
(2) High Quality of Treated Water
MBR removes suspended solids (SS) from the sludge liquid with membrane much more
certainly than the conventional sedimentation process. MBR also rejects microorganisms
such as Escherichia coli and Cryptosporidium efficiently.
Wastewater
Discharge or Reuse
Reuse
RO
membrane
Submerged Membrane
Module
Membrane
Tank
Fig. I-1 CAS Flow
Fig. I-2 MBR Flow
Sedimentation Tank
Wastewater
Aeration Tank
Discharge
