scholarly journals Laboratory-scale anaerobic sequencing batch reactor for treatment of stillage from fruit distillation

2013 ◽  
Vol 67 (5) ◽  
pp. 1068-1074 ◽  
Author(s):  
Elena Cristina Rada ◽  
Marco Ragazzi ◽  
Vincenzo Torretta
Keyword(s):  
Anaerobic Digestion ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Gas Production ◽  
Design Parameters ◽  
Anaerobic Sequencing Batch Reactor ◽  
Reactor Technology ◽  
Volatile Solids ◽  
Experimental Apparatus

This work describes batch anaerobic digestion tests carried out on stillages, the residue of the distillation process on fruit, in order to contribute to the setting of design parameters for a planned plant. The experimental apparatus was characterized by three reactors, each with a useful volume of 5 L. The different phases of the work carried out were: determining the basic components of the chemical oxygen demand (COD) of the stillages; determining the specific production of biogas; and estimating the rapidly biodegradable COD contained in the stillages. In particular, the main goal of the anaerobic digestion tests on stillages was to measure the parameters of specific gas production (SGP) and gas production rate (GPR) in reactors in which stillages were being digested using ASBR (anaerobic sequencing batch reactor) technology. Runs were developed with increasing concentrations of the feed. The optimal loads for obtaining the maximum SGP and GPR values were 8–9 gCOD L−1 and 0.9 gCOD g−1 volatile solids.

Performance characterization of anaerobic sequencing batch reactor process for digestion of night soil

2001 ◽  
Vol 43 (1) ◽  
pp. 27-34 ◽  
Author(s):  
J. G. Lee ◽  
J. M. Hur ◽  
D. Chang ◽  
T. H. Chung
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Ammonia Nitrogen ◽  
Gas Production ◽  
High Concentration ◽  
Anaerobic Sequencing Batch Reactor ◽  
Mixed Control ◽  
Volatile Solids ◽  
Equivalent Loading

Laboratory experiments were conducted to investigate the performance of an anaerobic sequencing batch reactor (ASBR) process for night soil treatment. Performances of the reactors were evaluated at an equivalent hydraulic retention time (HRT) of 10 days with an equivalent loading rate of 2.6 kgVS/m3/d (3.1 kgCOD/m3/day) at 35°C. Digestion of a night soil was possible using the ASBR at an HRT of 10 days in spite of high concentration of ammonia nitrogen and settleable solids. Solids were accumulated rapidly in the ASBRs, and their concentrations were 2.3∼2.4 times higher than that in a completely mixed control reactor. Remarkable increases in gas production were observed in the ASBRs compared with the control reactor. Average increases in equivalent daily gas production from the ASBRs were 205∼220% compared with that from the control run. The ASBR with reaction period/thickening period ratio (R/T ratio) of 1 showed a little higher gas production and organic removal efficiency than that with R/T ratio of 3. Volatile solids removals based on supernatant of the ASBRs were 12∼14% higher than that of the control reactor. Thus, the ASBR was a stable and effective process for the treatment of night soil having high concentration of settleable organics and ammonia nitrogen.

Study the effect of recycled pressurized air on oxygen transfer design parameters in sequencing batch reactor technology

2016 ◽  
Vol 31 (1) ◽  
pp. 90-96 ◽  
Author(s):  
Hesham M. Elkaramany ◽  
Amro A. Elbaz ◽  
Amal N. Mohamed ◽  
Alhassan H. Sakr
Keyword(s):  
Oxygen Transfer ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Design Parameters ◽  
Reactor Technology

Cellulosic waste degradation by rumen-enhanced anaerobic digestion

2003 ◽  
Vol 48 (4) ◽  
pp. 155-162 ◽  
Author(s):  
S.P. Barnes ◽  
J. Keller
Keyword(s):  
Anaerobic Digestion ◽  
Sequencing Batch Reactor ◽  
Loading Rate ◽  
Cellulose Degradation ◽  
Batch Reactor ◽  
Lignocellulosic Material ◽  
Anaerobic Sequencing Batch Reactor ◽  
Microbial Ecosystems ◽  
Cellulosic Waste ◽  
Waste Degradation

Anaerobic digestion of lignocellulosic material is carried out effectively in many natural microbial ecosystems including the rumen. A rumen-enhanced anaerobic sequencing batch reactor was used to investigate cellulose degradation to give analysis of overall process stoichiometry and rates of hydrolysis. The reactor achieved VFA production rates of 207-236 mg COD/L/h at a loading rate of 10 g/L/d. Overloading of the reactor resulted in elevated production of propionic acid, and on occasion, the presence of succinic acid. With improvements in mixing and solids wasting, the anaerobic sequencing batch reactor system could enable full-scale application of the process for treatment of cellulosic waste material.

scholarly journals Treatment of sago mill effluent for methane production using anaerobic sequencing batch reactor (ASBR)

2018 ◽  
Vol 2 (1) ◽  
pp. 18-22
Author(s):  
Rafiqqah Mohamad Sabri ◽  
Keyword(s):  
Anaerobic Digestion ◽  
Production Rate ◽  
Methane Production ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Cod Removal ◽  
Production Yield ◽  
Anaerobic Sequencing Batch Reactor ◽  
Methane Production Rate

In this research, sago mill effluent was treated using anaerobic sequencing batch reactor (ASBR). Seven HRT from 10 to 1.5 days were tested to evaluate the methane production from sago mill effluent. The findings revealed the highest methane production rate was found at 1.288 L CH4/L reactor. d under HRT of 2 days The results showed that COD removals decreased from 70% to 47% as HRT was reduced from 10 to 2 days. The HRT 1.5 days was found critical for the studied system, which leads to decreased in methane production, yield and COD removal. Overall, ASBR was capable to treat sago mill effluent in producing methane by means of anaerobic digestion.

Digestion of municipal sludge by anaerobic sequencing batch reactor

1994 ◽  
Vol 30 (12) ◽  
pp. 161-170 ◽  
Author(s):  
Duk Chang ◽  
Joon Moo Hur ◽  
Tai Hak Chung
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Gas Production ◽  
Municipal Sludge ◽  
High Concentration ◽  
Anaerobic Sequencing Batch Reactor ◽  
Mixed Control ◽  
Solids Concentration ◽  
Start Up ◽  
Equivalent Loading

Laboratory experiments were conducted to investigate the performance of the anaerobic sequencing batch reactor (ASBR) for digestion of a municipal sludge. The reactors were operated at an HRT of 10 days with an equivalent loading rate of 0.8-1.5 g VS 1−1 d−1 at 35°C. Solids were accumulated rapidly in the ASBR during start-up period. Flotation thickening occurred in the ASBRs, and its efficiency was comparable to that of additional thickening of the completely mixed control reactor. Solids concentrations in the ASBRs were 2.6 times higher than that in the control. The dehydrogenase activity had a strong correlation with the solids concentration. The ASBRs with 3- and 4-day cycle showed almost identical high digestion performances without adverse effect on digestion stability. The organics removals based on subnatant of the ASBRs were consistently above 90%. Remarkable increase in equivalent gas production of 52% was observed at the ASBRs compared with the control though the control and ASBRs showed similar effluent quality. Thus, digestion of a municipal sludge was possible using the ASBR in spite of high concentration of settleable solids in the sludge.

scholarly journals Biogas from slaughter house waste and optimization of the process

2016 ◽  
Vol 51 (3) ◽  
pp. 203-214 ◽  
Author(s):  
MA Rouf ◽  
MS Islam ◽  
T Rabeya ◽  
AK Mondal ◽  
M Khanam ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Stomach Content ◽  
Oxygen Demand ◽  
Gas Production ◽  
Batch Reactors ◽  
Volatile Solid ◽  
Optimum Conditions ◽  
Slaughter House ◽  
Destruction Efficiency ◽  
Volatile Solids

To assess the potential of biogas generation by anaerobic digestion from slaughter house waste (undigested stomach content) and to determine the optimum conditions for biogas generation from the substrate, different proportions of substrate were used in six batch reactors R1, R2, R3, R4, R5 and R6. The reactors were operated with initial volatile solid concentrations of 34.00, 50.80, 67.20, 51.60, 48.10 and 63.36 g/l and corresponding specific gas production obtained was 0.258, 0.200, 0.160, 0.270, 0.201 and 0.170 l/g respectively. The volatile solids (VS) destruction efficiency was 31.71%, 29.15%, 28.26%, 32.29%, 30.56 and 29.08% as well as chemical oxygen demand (COD)  reduction achieved in the test reactors were 40.31%, 44.44%, 49.40%, 53.24%, 48.55% and 51.26% in R1, R2, R3, R4, R5 and R6 respectively. Methane yield in different reactors varied from 72% to 76%. The optimum mix for generation of biogas from the substrate was 75% slaughter waste mixed with 25% cow dung.Bangladesh J. Sci. Ind. Res. 51(3), 203-214, 2016

scholarly journals Design of Sequencing Batch Reactor (SBR) Treatment Plant for Abattoir Wastewater (A Case of Apa Mmini Stream)

2020 ◽  
pp. 15-21
Author(s):  
Ogbebor Daniel ◽  
Ndekwu, Benneth Onyedikachukwu
Keyword(s):  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Settling Velocity ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Design Parameters ◽  
Sequence Batch Reactor ◽  
The Impact

Aim: The study aimed at designing a wastewater treatment method for removal of (Biological Oxygen Demand) BOD5 using Sequencing batch reactor (SBR). Study Design: SBR functions as a fill-and-draw type of activated sludge system involving a single complete-mix reactor where all steps of an activated sludge process take place. Methodology: The intermittent nature of slaughterhouse wastewaters favours batch treatment methods like sequence batch reactor (SBR). Attempts to remediate the impact of this BOD5 on the stream, led to the design of a sequence batch reactor which was designed to treat slaughterhouse effluent of 1000 L. Results: The oxygen requirement for effective removal of BOD5 to 95% was determined to be 21.10513 kgO2/d, while L:B  of 3:1 was considered for the reactor. Also, air mixing pressure for the design was 0.16835 bar, while settling velocity was . Conclusion: To ensure proper treatment of BOD5 load of the slaughterhouse, a sequencing Batch reactor of 1000 litre carrying capacity was designed. For effective operation of this design, the pressure exerted by the mixing air was 0.16835 bar which was far greater than the pressure exerted by the reactor content and the nozzle. Settling velocity of 0.0003445 m/s for 0.887 hrs was required for the reactor to be stable and a theoretical air requirement of 1.6884 m³/d was calculated. Hence the power dissipated by the rising air bubbles to ensure efficient mixing of oxygen in the reactor was calculated as 26530003.91 Kilowatts. With these design parameters, the high BOD5 load downstream of the river can be treated to fall below the FMEnv recommended limit of 50 mg/l.

Performance of anaerobic sequencing batch reactor in the treatment of pharmaceutical wastewater containing erythromycin and sulfamethoxazole mixture

2014 ◽  
Vol 70 (10) ◽  
pp. 1625-1632 ◽  
Author(s):  
S. Aydin ◽  
B. Ince ◽  
Z. Cetecioglu ◽  
E. G. Ozbayram ◽  
A. Shahi ◽  
...  
Keyword(s):  
Sequencing Batch Reactor ◽  
Biogas Production ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Control Unit ◽  
Anaerobic Treatment ◽  
Synthetic Wastewater ◽  
Fatty Acid Production ◽  
Anaerobic Sequencing Batch Reactor ◽  
Antibiotic Degradation

This study evaluates the joint effects of erythromycin–sulfamethoxazole (ES) combinations on anaerobic treatment efficiency and the potential for antibiotic degradation during anaerobic sequencing batch reactor operation. The experiments involved two identical anaerobic sequencing batch reactors. One reactor, as control unit, was fed with synthetic wastewater while the other reactor (ES) was fed with a synthetic substrate mixture including ES antibiotic combinations. The influence of ES antibiotic mixtures on chemical oxygen demand (COD) removal, volatile fatty acid production, antibiotic degradation, biogas production, and composition were investigated. The influent antibiotic concentration was gradually increased over 10 stages, until the metabolic collapse of the reactors, which occurred at 360 days for the ES reactor. The results suggest that substrate/COD utilization and biogas/methane generation affect performance of the anaerobic reactors at higher concentration. In addition, an average of 40% erythromycin and 37% sulfamethoxazole reduction was achieved in the ES reactor. These results indicated that these antibiotics were partly biodegradable in the anaerobic reactor system.

scholarly journals Treatment of winery wastewater by an anaerobic sequencing batch reactor

2002 ◽  
Vol 45 (10) ◽  
pp. 219-224 ◽  
Author(s):  
C. Ruíz ◽  
M. Torrijos ◽  
P. Sousbie ◽  
J. Lebrato Martínez ◽  
R. Moletta ◽  
...  
Keyword(s):  
Production Rate ◽  
Sequencing Batch Reactor ◽  
Loading Rate ◽  
Batch Reactor ◽  
Gas Production ◽  
Operating Conditions ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Winery Wastewater ◽  
Anaerobic Sequencing Batch Reactor

Treatment of winery wastewater was investigated using an anaerobic sequencing batch reactor (ASBR). Biogas production rate was monitored and permitted the automation of the bioreactor by a simple control system. The reactor was operated at an organic loading rate (ORL) around 8.6 gCOD/L.d with soluble chemical oxygen demand (COD) removal efficiency greater than 98%, hydraulic retention time (HRT) of 2.2 d and a specific organic loading rate (SOLR) of 0.96 gCOD/gVSS.d. The kinetics of COD and VFA removal were investigated for winery wastewater and for simple compounds such as ethanol, which is a major component of winery effluent, and acetate, which is the main volatile fatty acid (VFA) produced. The comparison of the profiles obtained with the 3 substrates shows that, overall, the acidification of the organic matter and the methanisation of the VFA follow zero order reactions, in the operating conditions of our study. The effect on the gas production rate resulted in two level periods separated by a sharp break when the acidification stage was finished and only the breaking down of the VFA continued.

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