Kinetics of aerobic biodegradation of organic pollutants in moving bed biological reactor (MBBR)

2017 ◽  
Vol 98 ◽  
pp. 31-36
Author(s):  
R. Saberi ◽  
A.H. Hassani ◽  
M.S. Abedi ◽  
A.T. Ardeshir ◽  
A. Mozaffari
Keyword(s):  
Organic Pollutants ◽  
Aerobic Biodegradation ◽  
Moving Bed ◽  
Kinetics Of

Photocatalysis of Coomassie Brilliant Blue Using Clay Mineral

2016 ◽  
Vol 869 ◽  
pp. 765-767 ◽  
Author(s):  
Layane Rodrigues Almeida ◽  
João Sammy Nery Souza ◽  
Edson Cavalcanti Silva Filho ◽  
Josy Anteveli Osajima
Keyword(s):  
Organic Pollutants ◽  
Uv Light ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Secondary Treatment ◽  
Toxic Compounds ◽  
Coomassie Brilliant Blue ◽  
Kinetics Of ◽  
Coomassie Brilliant ◽  
Photocatalytic Processes

The presence of organic pollutants, which cannot be eliminated by conventional processes of primary and secondary treatment, can be problematic. Photocatalytic processes offer an efficient breakdown of organic pollutants into non-toxic compounds such as CO2 and H2O. This paper proposes the use of the titanium dioxide embedded in palygorskite as a photoactive material in the degradation of cationic dye, Coomassie Brilliant Blue. The system was irradiated using UV light for a maximum time of 120 minutes. The concentration of the dye used was 1.0x10-4 mol L-1 in 0.5 g L-1 of the photoactive material. The kinetics of the system was monitored by UV-Vis spectrophotometry. In 120 minutes of radiation, the process of photocatalysis reduced the initial concentration of the Coomassie Brilliant Blue dye in half.

Denitrification Stoichiometry and Kinetics of Moving Bed Biofilm Reactor

2009 ◽  
Vol 2009 (4) ◽  
pp. 153-165 ◽  
Author(s):  
Arbina Shrestha ◽  
Rumana Riffat ◽  
Charles Bott ◽  
Imre Takacs ◽  
Beverley Stinson ◽  
...  
Keyword(s):  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Kinetics Of

Photooxidation Kinetics of Organic Pollutants in Municipal Waste Water

1971 ◽  
Vol 10 (4) ◽  
pp. 509-514 ◽  
Author(s):  
Victor Schorr ◽  
Bruno Boval ◽  
Vladislav Hancil ◽  
J. M. Smith
Keyword(s):  
Waste Water ◽  
Organic Pollutants ◽  
Municipal Waste ◽  
Kinetics Of

Kinetics of organics removal in swine wastewater treatment using anaerobic moving bed biofilm reactor

2021 ◽  
Vol 212 ◽  
pp. 112-120
Author(s):  
Anh Van Ngo ◽  
Oanh Hoang Thi Le ◽  
Quan Truong Nguyen ◽  
Hidenari Yasui ◽  
Khai Manh Nguyen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Biofilm Reactor ◽  
Swine Wastewater ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Organics Removal ◽  
Kinetics Of

scholarly journals Biodegradation of main carbon sources in vinasse stillage by a mixed culture of bacteria: influence of temperature and pH of the medium

2018 ◽  
Vol 78 (4) ◽  
pp. 764-775 ◽  
Author(s):  
Agnieszka Ryznar-Luty ◽  
Edmund Cibis ◽  
Krzysztof Lutosławski
Keyword(s):  
Mixed Culture ◽  
Organic Pollutants ◽  
Carbon Sources ◽  
Oxygen Demand ◽  
Aerobic Biodegradation ◽  
Medium Ph ◽  
Initial Ph ◽  
Fourth Series ◽  
Soluble Chemical Oxygen Demand ◽  
Available Carbon

Abstract The aim of the study was to examine how temperature and the pH influence the progress and efficiency of an aerobic biodegradation process, where major organic pollutants are removed from beet molasses vinasse by a mixed culture of Bacillus bacteria. It was conducted in an aerated bioreactor with a stirring system in four experimental series, each composed of five processes run at temperatures of 27, 36, 45, 54 and 63 °C. In the first and second series, medium pH was not controlled, the initial pH amounted to 6.5 and 8.0, respectively. In the third and fourth series, medium pH was controlled at 6.5 and 8.0, respectively. Under optimal conditions, the pollution load of the vinasse stillage expressed as soluble chemical oxygen demand was removed with an 88.73% efficiency. The bacterial culture assimilated all organic pollutants simultaneously, but the rate of assimilation was different. An exception was the process of betaine assimilation, which intensified only when readily available carbon sources were depleted in the medium. Synthesis and assimilation of organic acids were observed in all experiments. Advantages of the proposed method include: possibility of its use at high temperatures, and no necessity for medium pH adjustment during the process.

Simultaneous photochemical generation of ozone in the gas phase and photolysis of aqueous reaction systems using one VUV light source

1997 ◽  
Vol 35 (4) ◽  
pp. 41-48 ◽  
Author(s):  
T.M. Hashem ◽  
M. Zirlewagen ◽  
A. M. Braun
Keyword(s):  
Gas Phase ◽  
Light Source ◽  
Organic Pollutants ◽  
Vacuum Ultraviolet ◽  
Oxidative Degradation ◽  
Reaction System ◽  
Photochemical Reactions ◽  
Experimental Conditions ◽  
Photochemical Generation ◽  
Kinetics Of

A more efficient use of vacuum ultraviolet (VUV) radiation produced by an immersed Xe-excimer light source (172 nm) was investigated for the oxidative degradation of organic pollutants in aqueous systems. All emitted VUV radiation from one light source was used in two simultaneous but separate photochemical reactions: (1) photochemical generation of ozone by irradiating oxygen in the gas phase and (2) photolysis of the aqueous reaction system. The gas stream containing the generated ozone is sparged into the reaction system, thus enhancing the oxidative degradation of organic pollutants. The photochemically generated ozone in the gas phase was quantitatively analyzed, and the kinetics of the degradation of 4-chlorophenol (4-CP) and of the dissolved organic carbon (DOC) were determined under different experimental conditions. The results show that the rates of degradation of the substrate and of the DOC decrease in the order of the applied processes, VUV/O3 > O3 > VUV.

Titanium Dioxide-mediated Photocatalysed Mineralization of Two Selected Organic Pollutants in Aqueous Suspensions

2013 ◽  
Vol 16 (2) ◽  
Author(s):  
Khalid Umar ◽  
M. M. Haque ◽  
Niyaz A. Mir ◽  
M. Muneer ◽  
I. H. Farooqi
Keyword(s):  
Titanium Dioxide ◽  
Organic Pollutants ◽  
Hplc Analysis ◽  
Irradiation Time ◽  
Atmospheric Oxygen ◽  
Model Compounds ◽  
Aqueous Suspensions ◽  
Analysis Technique ◽  
Mineralization Kinetics ◽  
Kinetics Of

AbstractTitanium dioxide-mediated photocatalytic mineralization of two selected organic pollutants such as Metalaxyl (ML) and Tinidazole (TN) has been investigated in aqueous suspensions in the presence of atmospheric oxygen under a variety of conditions. The mineralization was studied by monitoring the depletion in total organic carbon (TOC) content as a function of irradiation time. In addition HPLC analysis technique was also used to monitor the degradation of model compounds under investigations. The mineralization kinetics of both compounds were investigated under different conditions such as type of TiO

Sign in / Sign up

Export Citation Format

Share Document