scholarly journals Enhanced biodegradation of phenol in a novel cyclic activated sludge integrated with a rotating bed bioreactor in anoxic and peroxidase-mediated conditions

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6293-6305 ◽  
Author(s):  
Mojtaba Pourakbar ◽  
Gholamreza Moussavi ◽  
Kamyar Yaghmaeian
Keyword(s):  
Activated Sludge ◽  
Phenol Biodegradation ◽  
Enhanced Biodegradation

Cyclic activated sludge integrated with a rotating bed bioreactor (CASIR) was used for phenol biodegradation.

Enhanced Biodegradation of Iopromide and Trimethoprim in Nitrifying Activated Sludge†

2006 ◽  
Vol 40 (23) ◽  
pp. 7367-7373 ◽  
Author(s):  
Angela L. Batt ◽  
Sungpyo Kim ◽  
Diana S. Aga
Keyword(s):  
Activated Sludge ◽  
Enhanced Biodegradation

A NEW MODEL OF PHENOL BIODEGRADATION AND ACTIVATED SLUDGE GROWTH IN FEDBATCH CULTURES

2006 ◽  
Vol 39 (2) ◽  
pp. 553-558 ◽  
Author(s):  
Cherif Ben-Youssef ◽  
Julio Waissman ◽  
Gabriela Vázquez
Keyword(s):  
Activated Sludge ◽  
Phenol Biodegradation ◽  
New Model

Comparing activated sludge and aerobic granules as microbial inocula for phenol biodegradation

2005 ◽  
Vol 67 (5) ◽  
pp. 708-713 ◽  
Author(s):  
Stephen Tiong-Lee Tay ◽  
Benjamin Yan-Pui Moy ◽  
Abdul Majid Maszenan ◽  
Joo-Hwa Tay
Keyword(s):  
Activated Sludge ◽  
Aerobic Granules ◽  
Phenol Biodegradation ◽  
Microbial Inocula

Biodegradation of High Phenol Concentration in a Membrane Bioreactor

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Benoît Marrot ◽  
Adrian Barrios-Martinez ◽  
Philippe Moulin ◽  
Nicolas Roche
Keyword(s):  
Activated Sludge ◽  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Substrate Inhibition ◽  
Phenol Degradation ◽  
Phenol Concentration ◽  
Phenol Removal ◽  
Permeate Flux ◽  
Phenol Biodegradation ◽  
Haldane Model

Phenol biodegradation by mixed culture was studied in a membrane bioreactor (MBR) over a period of 285 days. Activated sludge was used as the MBR biomass, after controlled acclimation to high phenol concentrations. The MBR permeate flux was stabilized quickly (in a few hours) and always maintained above 90 L.h-1.m-2.bar-1. The acclimatized activated sludge allowed significant phenol degradation (95% average COD removal efficiency and greater than 99% phenol removal efficiency) without supplemental reagent addition. After sludge acclimatization, the Haldane kinetics model for a single substrate was used to obtain the maximum specific growth rate (µm = 0.438 h-1), the half saturation coefficient (Ks = 29.54 mg.L-1) and the substrate inhibition constant (Ki = 72.45 mg.L-1). Biodegradation experiments were conducted at different phenol concentrations (4.9 – 8.5 g.L-1 d-1). Although the phenol concentration was high, the Haldane model was still acceptable, and removal capacities were in agreement with literature. Excellent effluent quality was obtained regardless of the extremely short SRT (5 – 17 days). This work shows the potential of MBR for toxic chemical elimination, charged effluents treatment and process stability.

scholarly journals Long-term exposure of activated sludge in chemostats leads to changes in microbial communities composition and enhanced biodegradation of 4-chloroaniline and N-methylpiperazine

Chemosphere ◽  
2020 ◽  
Vol 242 ◽  
pp. 125102 ◽  
Author(s):  
Baptiste A.J. Poursat ◽  
Rob J.M. van Spanning ◽  
Martin Braster ◽  
Rick Helmus ◽  
Pim de Voogt ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Microbial Communities ◽  
Enhanced Biodegradation

Enhanced biodegradation of organic nitrogenous compounds in resin manufacturing wastewater by anoxic denitrification and oxic nitrification process

1996 ◽  
Vol 34 (10) ◽  
pp. 35-41 ◽  
Author(s):  
Cheng Sheng-shung ◽  
Lin Yuh-Tarng ◽  
Chen Sheng-Kun
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Organic Nitrogen ◽  
Activated Sludge Process ◽  
Nitrogenous Compounds ◽  
Conventional Activated Sludge ◽  
Study Results ◽  
Nitrification Process ◽  
Enhanced Biodegradation ◽  
Conventional Activated Sludge Process

In this study, a stream of resin manufacturing wastewater with high contents of organic nitrogenous compounds was treated by a conventional activated sludge process with extended aeration and a modified anoxic denitrification unit followed with two oxic activated sludge units respectively. Performance comparison of these two processes showed that the enhanced biodegradation of organic nitrogen in the modified process was attained with 69.0% of organic nitrogen removal that related to 39.0% removal in the conventional process. The anoxic/oxic process also promoted the removal efficiencies of COD, TKN and TN (total nitrogen) from 91%, 49.6% and 7.4% to 95.3%, 83.8% and 74.4% respectively, in comparison with the conventional extended activated sludge process. These cheerful results also corresponded to the acceptable averaged effluent quality: 82 mg/l of CODs, 48 mg/l of Org.-N, 11 mg/l of NH4+-N, and 42 mg N/l of NO3−-N, that could meet the national effluent standard of ROC-EPA in 1998. The successful investigation also demonstrated that about 50% of the total organic nitrogen removal was achieved in the anoxic unit associated with denitrification, while the residual organic nitrogen was removed in the oxic unit. The pilot-study results suggested that the resin manufacturing wastewater containing high concentration of organic nitrogen should be treated by the anoxic denitrification and oxic nitrification process instead of the conventional activated sludge process with extended aeration.

scholarly journals Enhanced biodegradation of phenolic wastewaters with acclimatized activated sludge – A kinetic study

2019 ◽  
Vol 378 ◽  
pp. 122186 ◽  
Author(s):  
Mohammadreza Kamali ◽  
Tania Gameiro ◽  
Maria Elisabete Costa ◽  
Isabel Capela ◽  
Tejraj M. Aminabhavi
Keyword(s):  
Activated Sludge ◽  
Kinetic Study ◽  
Enhanced Biodegradation
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