Effects of flux enhancing polymer on the characteristics of sludge in membrane bioreactor process.
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/I to 21 mg/I 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.
Yoon
S H
SH
Nalco Company, 1601 West Diehl Rd., Naperville, 11 60563-1198, USA. syoon@nalco.com
Collins
J H
JH
Musale
D
D
Sundararajan
S
S
Tsai
S P
SP
Hallsby
G A
GA
Kong
J F
JF
Koppes
J
J
Cachia
P
P
D019149:Bioreactors; D008567:Membranes, Artificial; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism; D010539:Permeability; D011108:Polymers / Q000737:chemistry; D011134:Polysaccharides / Q000302:isolation & purification; D012722:Sewage; D013314:Stress, Mechanical; D013997:Time Factors; D014462:Ultrafiltration; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D008567:Membranes, Artificial; D011108:Polymers; D011134:Polysaccharides; D012722:Sewage; D010100:Oxygen