Operation for Bio-Hydrogen Production of CSTR with Integration of Immobilized and Suspended Cell Process

2014 ◽  
Vol 953-954 ◽  
pp. 949-952 ◽  
Author(s):  
Yue Wang ◽  
Yong Feng Li ◽  
Qiao Yan Li ◽  
Rui Ying Lei
Keyword(s):  
Hydrogen Production ◽  
Microbial Growth ◽  
Hydraulic Retention Time ◽  
Removal Rate ◽  
Acid Resistance ◽  
Continuous Stirred Tank Reactor ◽  
Suspended Cell ◽  
Tank Reactor ◽  
Continuous Stirred Tank ◽  
Cod Removal Rate

A new-styled continuous stirred tank reactor (CSTR) seeded with activated sludge attached onto granular activated carbon (GAC) was developed for raised hydrogen production using diluted grenadine syrup. Emphasis was placed on the hydrogen producing performance and stability of the reactor. It was found that the temperature of (35 ± 1) °C, hydraulic retention time (HRT) of 4h, influent COD of 6000mg/L, the maximum hydrogen production was up 12.06L/d. In addition, though pH decreased to 3.42, the microbial growth still high and COD removal rate reached 50%, demonstrating that the reactor processed the ability of acid resistance.

Kinetic Modeling of Continuous Stirred Tank Reactor - Operating On Distillery Effluent

2020 ◽  
Author(s):  
Dhananjay Mohite ◽  
S.S. Salimath
Keyword(s):  
Volatile Fatty Acids ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Organic Content ◽  
Stirred Tank ◽  
Distillery Effluent ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

Abstract To identify the viability and performance, distillery effluent having very high organic content was studied on continuous stirred tank reactor (CSTR). Under different organic loading rates (OLR), optimum conditions for highest chemical oxygen demand (COD) removal and biogas generation was found to be for OLR of 0.10 COD kg /d to 0.11 COD kg /d. Highest COD exertion efficiency was found to be around 73% for OLR of 9.166 kg COD/m3/d when hydraulic retention time (HRT) reduced from 15 to 14 days. Biogas generation was observed to be around 30 L/d with a conversion coefficient of 0.405 and 0.12 volatile fatty acids (VFA) to alkalinity ratio were recorded in this stage. Applying the modified Stovere Kincannon model to the reactor, the maximum removal rate constant (Umax) and saturation value constant (Kb) were found to be 17.123 kg/m3/day, and 33.471 kg/m3/day respectively. These records are predominantly significant, when operating the anaerobic biodigesters for treating the distillery effluent along with the production of biogas as an energy sources. CSTR can effectively be employed in treatment of this effluent however post bio-digestion effluent still contains considerable COD. To meet the pollution norms and standards it needs to be treated further. To understand the complex biological treatment process of this effluent further trials are required to be conducted.

Bio-Hydrogen Production through Anaerobic Microorganism Fermentation from Molasses Wastewater in a Continuous Stirred Tank Reactor

2015 ◽  
Vol 737 ◽  
pp. 336-339
Author(s):  
Zhi Qin ◽  
Yong Yan Cui ◽  
Chao Yu Zhang ◽  
Bing Xie
Keyword(s):  
Hydrogen Production ◽  
Ph Value ◽  
Stirred Tank ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Continuous Stirred Tank Reactor ◽  
Anaerobic Microorganism ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

In order to treat the beet sugar factory wastewater and produce hydrogen, a low pH, ethanol-type fermentation process had happened in a continuous stirred tank reactor (CSTR) with an effective volume of 9.6 L in this experiment. The results showed that after inoculation with activated sludge and operation at organic loading rate (OLR) of 9 kgCOD/m3·d, hydraulic retention time (HRT) of 8h, influent pH value of 6.5 and temperature of 35°C for 30 days, the CSTR achieved stable ethanol-type fermentation. During this period of stable operation, the reactor showed a stable COD removal efficiency of 19.2% and hydrogen production rate of 0.1L/gMLSS·d. Effluent pH ranged from 4.0 to 4.5. The total amount of ethanol and acetic acid was 1384 mg/L, accounted for 81% of the total liquid products, which can be attributed to ethanol-type fermentation. The experimental results showed that the CSTR system had good operation stability and microbial activity, which led to high substrate conversion rate and hydrogen production ability.

scholarly journals Biological treatment of phenolic wastewater in an anaerobic continuous stirred tank reactor

2013 ◽  
Vol 19 (2) ◽  
pp. 173-179 ◽  
Author(s):  
Taghizade Firozjaee ◽  
Ghasem Najafpour ◽  
Ali Asgari ◽  
Maryam Khavarpour
Keyword(s):  
Biogas Production ◽  
Removal Rate ◽  
Stirred Tank ◽  
Organic Loading Rate ◽  
Phenol Removal ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Phenolic Wastewater ◽  
Continuous Stirred Tank

In the present study, an anaerobic continuous stirred tank reactor (ACSTR) with consortium of mixed culture was operated continuously for a period of 110 days. The experiments were performed with three different hydraulic retention times and by varying initial phenol concentrations between 100 to 1000 mg/L. A maximum phenol removal was observed at a hydraulic retention time (HRT) of 4 days, with an organic loading rate (OLR) of 170.86 mg/L.d. At this condition, phenol removal rate of 89% was achieved. In addition, the chemical oxygen demand (COD) removal corresponds to phenol removal. Additional operating parameters such as pH, MLSS and biogas production rate of the effluents were also measured. The present study provides valuable information to design an anaerobic ACSTR reactor for the biodegradation of phenolic wastewater.

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