Activated sludge-mediated biodegradation of dimethyl phthalate under fermentative conditions

2008 ◽  
Vol 20 (8) ◽  
pp. 922-926 ◽  
Author(s):  
Donglei WU ◽  
Qaisar MAHMOOD ◽  
Lili Wu ◽  
Ping ZHENG
Keyword(s):  
Activated Sludge ◽  
Dimethyl Phthalate

Response of Phthalate Esters-Acclimated Activated Sludge to 2,4-Dinitrophenol

1987 ◽  
Vol 19 (3-4) ◽  
pp. 461-470 ◽  
Author(s):  
R. Yucel Tokuz
Keyword(s):  
Activated Sludge ◽  
System Performance ◽  
Suspended Solids ◽  
Phthalate Esters ◽  
Oxygen Demand ◽  
Process Performance ◽  
Dimethyl Phthalate ◽  
L System ◽  
Period System ◽  
Acclimated Activated Sludge

The process performance of an activated sludge system during acclimation to phthalate esters was examined. Concentration of the phthalate esters was increased gradually, and over about a two-week period, the acclimation to a mixture of 410 mg/L diethyl phthalate and 540 mg/L dimethyl phthalate was complete. It was observed that the effluent Chemical Oxygen Demand (COD) was not affected adversely in spite of increasing influent COD. Other indicators of process performance, for example, effluent suspended solids, were at acceptable levels at the completion of acclimation. The system responded well when 2,4-dinitrophenol, up to 4 mg/L, was included in the influent in addition to phthalate esters. Actually an improvement in system effluent COD was observed possibly due to increasing Mixed Liquor Suspended Solids (MLSS). At a 2,4-dinitrophenol concentration of 8 mg/L, system performance deteriorated considerably but the recovery was fast, and within a two-week period system performance returned to normal.

Reduction of Excess Activated Sludge by Controlling the Motion of Ferrite Particles

2014 ◽  
Vol 134 (4) ◽  
pp. 475-476
Author(s):  
Mahmudul Kabir ◽  
Tatsuya Chiba ◽  
Masafumi Suzuki ◽  
Noboru Yoshimura
Keyword(s):  
Activated Sludge

Study on the Treatment of Excess Activated Sludge on the Return Sludge Line

2014 ◽  
Vol 134 (2) ◽  
pp. 239-240 ◽  
Author(s):  
Mahmudul Kabir ◽  
Masaya Endo ◽  
Masafumi Suzuki ◽  
Noboru Yoshimura
Keyword(s):  
Activated Sludge

MC Series of Bacterium Products for Troubleshooting in Activated Sludge Processing

2004 ◽  
Vol 58 (10) ◽  
pp. 1338-1344 ◽  
Author(s):  
Hideomi Matsuoka ◽  
Takuji Yamamoto
Keyword(s):  
Activated Sludge
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