Performance and Kinetic Studies of Dairy Effluent Using Mixed Culture in a Suspended Growth Batch Reactor

2020 ◽  
pp. 383-393
Author(s):  
Dipankar Raha ◽  
Pradyut Kundu ◽  
Somnath Mukherjee
Keyword(s):  
Mixed Culture ◽  
Batch Reactor ◽  
Kinetic Studies ◽  
Dairy Effluent ◽  
Suspended Growth

scholarly journals Catalytic wet oxidation of high concentration pharmaceutical wastewater with Fe3+ as catalyst

2018 ◽  
Vol 2017 (3) ◽  
pp. 661-666
Author(s):  
Xu Zeng ◽  
Jun Liu ◽  
Jianfu Zhao
Keyword(s):  
Oxygen Pressure ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Kinetic Studies ◽  
Cod Removal ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Pharmaceutical Wastewater ◽  
High Concentration ◽  
Temperature Time

Abstract Catalytic wet oxidation of high concentration pharmaceutical wastewater with Fe3+ as catalyst was carried out in a batch reactor. Results showed that the degradation of pharmaceutical wastewater was enhanced significantly by Fe3+. The effects of reaction parameters, such as the catalyst dose, reaction temperature, time, and initial oxygen pressure, were discussed. The chemical oxygen demand (COD) removal increased with the increases of catalyst dose, temperature, time and oxygen supply. With the initial COD 34,000–35,000 mg/L, approximately 70% COD removal can be achieved under the conditions of catalyst 1.0 g and oxygen pressure 1.0 MPa at 250 °C after 60 min. The results of kinetic studies showed that two reaction steps existed in this oxidation process, which followed an apparent first-order rate law. This process provides an effective approach for the pretreatment of high concentration pharmaceutical wastewater.

scholarly journals Biohydrogen production under hyper salinity stress by an anaerobic sequencing batch reactor with mixed culture

2018 ◽  
Vol 16 (2) ◽  
pp. 159-170 ◽  
Author(s):  
Ensiyeh Taheri ◽  
Mohammad Mehdi Amin ◽  
Ali Fatehizadeh ◽  
Hamidreza Pourzamani ◽  
Bijan Bina ◽  
...  
Keyword(s):  
Mixed Culture ◽  
Salinity Stress ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Biohydrogen Production ◽  
Anaerobic Sequencing Batch Reactor

Kinetics of the Ozonation of Tetrabromobisphenol-A in Wastewater

2011 ◽  
Vol 383-390 ◽  
pp. 2945-2950 ◽  
Author(s):  
Jie Zhang ◽  
Shi Long He ◽  
Mei Feng Hou ◽  
Li Ping Wang ◽  
Li Jiang Tian
Keyword(s):  
Rate Constants ◽  
Apparent Rate Constant ◽  
Reaction Rate ◽  
Batch Reactor ◽  
Kinetic Studies ◽  
Tetrabromobisphenol A ◽  
First Order ◽  
Reaction Rate Constants ◽  
Pseudo First Order ◽  
Kinetics Of

The kinetics of TBBPA degradation by ozonation in semi-batch reactor was studied. The reaction rate constants of TBBPA with O3 and •OH were measured by means of direct ozone attack and competition kinetics, and the values of which were 6.10 l/(mol•s), 4.8×109 l/(mol•s), respectively. Results of kinetic studies showed that TBBPA degradation by ozonation under the different conditions tested followed the pseudo-first-order. The values of apparent rate constant of TBBPA degradation increased with the increase of ozone dosage and pH, but decreased with the increase of initial TBBPA concentration.

REMOVAL OF AN ORGANIC REFRACTORY COMPOUND BY PHOTOCATALYSIS IN BATCH REACTOR - KINETIC STUDIES

2015 ◽  
Vol 14 (6) ◽  
pp. 1327-1338 ◽  
Author(s):  
Lidia Favier ◽  
Andrei Ionut Simion ◽  
Lacramioara Rusu ◽  
Mariana Liliana Pacala ◽  
Cristina Grigoras ◽  
...  
Keyword(s):  
Refractory Compound ◽  
Batch Reactor ◽  
Kinetic Studies ◽  
Reactor Kinetic

Nickel catalyzed dimerization of propene in chloroaluminate ionic liquids: Detailed kinetic studies in a batch reactor

2009 ◽  
Vol 314 (1-2) ◽  
pp. 42-48 ◽  
Author(s):  
Marcus Eichmann ◽  
Wilhelm Keim ◽  
Marco Haumann ◽  
Berthold U. Melcher ◽  
Peter Wasserscheid
Keyword(s):  
Ionic Liquids ◽  
Batch Reactor ◽  
Kinetic Studies

Combined biological and chemical treatment of highly concentrated residual dyehouse liquors

1998 ◽  
Vol 38 (4-5) ◽  
pp. 339-346 ◽  
Author(s):  
R. Krull ◽  
M. Hemmi ◽  
P. Otto ◽  
D. C. Hempel
Keyword(s):  
Mixed Culture ◽  
Chemical Treatment ◽  
Azo Dye ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Reactive Dyes ◽  
Water Soluble ◽  
Purification Procedure ◽  
Biological Degradation ◽  
Facultative Anaerobic

The combined biological and chemical treatment of highly concentrated reactive azo dye-containing residual dyehouse liquors with recalcitrant compounds was investigated in a sequencing batch reactor (SBR). The plant consists of a batch reactor in which the anoxic and aerobic phases are carried out by sequenced steps. Water-soluble reactive dyes were reductively cleft and decolorized by a facultative anaerobic bacterial mixed culture under anoxic conditions. Complete decolorization was observed up to concentrations of nearly 20 g dye/L without addition of an external auxiliar substrate. Mineralization of the cleavage products occurs with the same bacterial mixed culture in the same reactor under aerobic conditions. The biomass used for the anoxic treatment is grown in this aerobic phase by the use of split flows with readily biodegradable compounds. Because of the recalcitrant toxic character of some remaining substances, further aerobic mineralization was initiated by partial oxidation with ozone. Partial ozonization in a circulated stream with biological post-treatment of the transformed substances led to an increased reaction selectivity, to a better biological degradation and not least to a lower consumption of ozone. Due to this purification procedure involving highly concentrated residual dyehouse liquors a total decolorization and an overvall degradation of nearly 90% in DOC was achieved.

scholarly journals Biodegradation of phenanthrene in an anaerobic batch reactor: Growth kinetics

2010 ◽  
Vol 16 (2) ◽  
pp. 157-165 ◽  
Author(s):  
H.S. Nasrollahzadeh ◽  
G.D. Najafpour ◽  
M. Pazouki ◽  
H. Younesi ◽  
A.A. Zinatizadeh ◽  
...  
Keyword(s):  
Microbial Growth ◽  
Microbial Population ◽  
Specific Growth ◽  
Batch Reactor ◽  
Kinetic Studies ◽  
Dry Weight ◽  
Maximum Cell ◽  
High Concentrations ◽  
Specific Growth Rates ◽  
Doubling Times

The purpose of present research was to demonstrate the ability of mixed consortia of microorganisms to degrade high concentrations of phenanthrene (PHE) as the sole carbon source. Batch experiments were carried out by induction of mineral salt medium containing PHE to the seed culture and monitoring PHE biodegradation. The microbial propagation was conducted using PHE concentrations in the range of 20 to 100 mg/l. The microbial growth on PHE was defined based on Monod and modified Logistic rate models. The kinetic studies revealed that maximum specific growth rates (?m) for PHE concentrations of 20, 50 and100 mg/l were 0.12, 0.23 and 0.035 h-1, respectively. The doubling times for microbial population in PHE concentrations of 20, 50 and100 mg/l were 13, 15 and 17.5h, respectively. Also, maximum cell dry weight (xm) of 54.23 mg/l was achieved, while the inhibition coefficient was 0.023 h-1. It was observed that the experimental data were well represented by the proposed models. It was also found that the biodegradation of PHE was successfully performed by the isolated strains.

Relevance of the Luong model to describe the biodegradation of phenol by mixed culture in a batch reactor

2011 ◽  
Vol 62 (2) ◽  
pp. 581-586 ◽  
Author(s):  
Adhya-Eddine Hamitouche ◽  
Zoubida Bendjama ◽  
Abdeltif Amrane ◽  
Farida Kaouah ◽  
Djamila Hamane
Keyword(s):  
Mixed Culture ◽  
Batch Reactor
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