Effects of flux enhancing polymer on the characteristics of sludge in membrane bioreactor process

Author:

Yoon S.-H.1,Collins J.H.1,Musale D.1,Sundararajan S.1,Tsai S.-P.1,Hallsby G.A.1,Kong J.F.2,Koppes J.3,Cachia P.4

Affiliation:

1. Nalco Company, 1601 West Diehl Rd., Naperville, 11 60563-1198, USA

2. Nalco Pacific Pte. Ltd, 2 International Business Park #02-20, The Strategy Tower2, Singapore, 609930

3. Nalco Europe B.V., Ir. G. Tjalmaweg 1, 2342 BV Oegstgeest, The Netherlands

4. Nalco Japan Co., Ltd., Shinagawa Center Bldg. 10F, 23–17 Takanawa 3-Chome, Minato-Ku, Tokyo, 108-0074, Japan

Abstract

A newly developed membrane performance enhancer (MPE) was used to prevent membrane fouling in a membrane bioreactor (MBR) process. It transpired that 1,000 mg/l of MPE reduced polysaccharide levels from 41 mg/l to 21 mg/l on average under the experimental condition. Repeated experiments also confirmed that 50–1,000 mg/l of MPE could reduce membrane fouling significantly and increase the intervals between membrane cleanings. Depending on MPE dosages and experimental conditions, trans-membrane pressure (TMP) increase was suppressed for 20–30 days, while baseline TMP surged within a few days. In addition, MPE allowed MBR operation even at 50,000 mg/l of total solid and reduced permeate COD. However, no evidence of toxicity for sludge was found from respiratory works.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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