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Enhanced Biohydrogen
Production Utilizing
Carbohydrate Rich Industrial
Wastewater Under
Anaerobic Microenvironment
Atun RoyChoudhury
M.E. Scholar (Env Engg) & ResearchAsst
Annamalai University (Ramky)
Over view
Introduction
Area of Application
What are the Problem Addressed
Limitations/Drawbacks of Current Available Products
Elaborative Description of the Innovation
Area of Immediate and Future Application
Novelty and Usefulness
Stage of the Innovation
Future Research
Market and competitor
2 12/17/2018 Department of Civil Engg, AU
Introduction
3 12/17/2018 Department of Civil Engg, AU
Waste to Energy Cycle
4 12/17/2018 Department of Civil Engg, AU
Wastes suitable for energy production
Solid wastes with high carbon content and heating value
Waste water with high BOD and COD value
Waste gases with high heating value (However, in practice this
option is not normally used).
5 12/17/2018 Department of Civil Engg, AU
Scenario of Bio-hydrogen
Synthesis of bio-hydrogen oil from the organic substrate comprises
exclusive advantages like-
• High rate of bacterial growth requires low energy input.
• No oxygen limitation problems.
• Economic feasibility proclaimed by using dark fermentation process
etc.
• Both pure culture such as Clostridium sp. and mixed cultures of
anaerobic bacteria, can used.
• Wide range of carbonaceous waste materials can be used such as
sugar wastewater, starch wastewater, and dairy waste water etc.
6 12/17/2018 Department of Civil Engg, AU
Area of Application
Waste to Energy Conversion
Clean and Renewable Energy
Synthesis
7 12/17/2018 Department of Civil Engg, AU
What are the Problem Addressed
In the recent era, utmost attention is paid towards exploring the
alternative source of energies, being more specific “Green Energies”.
The conventional energy sources are non-renewable and subjected to
the greater depletion.
Apart from this, due to the rapid urbanization and industrial growth
quantity of waste generated also got increased.
A Sustainable Waste Management technology becomes one of the
prime requirement of the present time.
The present technology is capable of enlightening two prime aspects
of the present waste management scenario namely,
• “Waste Treatment and Minimization”
• “Waste to Energy Conversion”
8 12/17/2018 Department of Civil Engg, AU
Limitations/Drawbacks of Current Available Products
Nowadays, universal energy necessities are mostly dependent on fossil fuel.
As per the conventional practice, after extracting juice from the sugarcane the
MOLASSESAND BAGASSE are disposed unscientifically by open dumping.
wastewater from the sugar industries is a “Misplaced Resource”
The ultimate goal is “Sustainable Development”
Drawbacks
• “Leachate formation”
• “Ground Water Contamination”
• “Change in Soil pH”
• “Conversion of primary pollutant to secondary pollutant”
• “Air Pollution Due to the Burning of Fossil Fuel”
• “Generation of Green House Gases”
• “Global warming”
9 12/17/2018 Department of Civil Engg, AU
Elaborative Description of the Innovation
“Anaerobic Dark Fermentation Process”
Pilot scale MAUASB reactor was fabricated and operated for the
period of 5 months.
The reactor start-up period was minimized using the Seed Sludge.
Quantifying the overall bio-hydrogen production, a potential
growth was significant between 2nd and 8th day of reactor start up.
10 12/17/2018 Department of Civil Engg, AU
Inoculum pre-treatment
Screening &
Identification
16s rRNA
identification
Adaptation of
strain
improvement
strategies
Characterization of
starch and sugar
Industry wastewater
11 12/17/2018 Department of Civil Engg, AU
Portrayal of the bioreactor system
Monitoring Based Agitable Up flow Anaerobic Sludge Blanket Reactor
Feed tank has the supply volume of 10 L
Total experimental volume of the reactor was 21 L
5L volume meant for gas collection
16L working volume
Diameter of 212 mm and height of 460 mm
4 different segments-
• Seed sludge introduction
• Substrate configuration
• Biofilm
• Gas collection chamber
12 12/17/2018 Department of Civil Engg, AU
Batch Reactor with Different Substrates
With Glucose With Sucrose
13 12/17/2018 Department of Civil Engg, AU
An overview of the Pilot Scale MAUASB reactor
14 12/17/2018 Department of Civil Engg, AU
Computer Compatibility of the Pilot Scale Reactor
15 12/17/2018 Department of Civil Engg, AU
Characteristics of raw starch wastewater effluent
16 12/17/2018 Department of Civil Engg, AU
S.No. Parameter* Tapioca Starch Effluent
1 pH 4-5
2 Total Suspended Solids 400-800
3 Total Dissolved Solids 1000-1400
4 Chlorides 200-500
5 Sulphates 50-200
6 Oil And Grease 3-12
7 BOD 2200-4000
8 COD 4000-6000
9 Phosphates 30-120
10 Ammonical Nitrogen 4-5
Characterization of sugar industry effluent
17 12/17/2018 Department of Civil Engg, AU
S.No. Parameter* Sugar effluent
1 pH 6.5-8.8
2 Total solids 870-1950
3 Total suspended solids 220-790
4 Total dissolved solids 400-1650
5 Chlorides 18-40
6 Dissolved oxygen 0-2.0
7 BOD 300-2200
8 COD 1360-2000
9 Sulphate 40-70
10 Oil and grease 60-100
Inoculum pretreatment
Heat shock treatment (HST)
Acid pretreatment / acid enrichment
Chloroform pretreatment
18 12/17/2018 Department of Civil Engg, AU
16s rRNA identification for bacterial species
Isolation of bacterial genomic DNA.
Column purification of genomic DNA
Preparation of samples for PCR.
PCR set up
PCR product analysis
PCR product purification
Sequencing
Data analysis
GENOMIC DNA EXTRACTION
AGAROSE GEL ELECTROPHORESIS
COLUMN PURIFICATION
19 12/17/2018 Department of Civil Engg, AU
20 12/17/2018 Department of Civil Engg, AU
Optimization of monitoring parameters
pH between 4.5 and 8.5
Standard concentration between 0.2 and 0.6 OD at 600 nm
Substrate concentration between 2.5 and 25 g L-1
Temperature range between 250 and 400 C
21 12/17/2018 Department of Civil Engg, AU
Adaptation of strain improvement strategies
Selection of stable strains
Selection of non- foaming strains
Selection of strains resistant to the
components of the medium
Selection of morphologically
favourable strains
Selection of strains which are
tolerant to low oxygen tension
Selection of strains based on
mutagenic studies namely
auxotrophic and mutant resistant to
analogues
22 12/17/2018 Department of Civil Engg, AU
Bio Hydrogen Production atVarious Substrate
Concentrations
23 12/17/2018 Department of Civil Engg, AU
CumulativeHydrogenproduction(ml)
Time in hours
5 g/l
10 g/l
20mg/l
40 g/l
Bio Hydrogen Production atVaried pH
Concentrations
24 12/17/2018 Department of Civil Engg, AU
cumulativehydrogenproduction(ml)
Time in hours
Initial pH 5
Initial pH 5.5
Initial pH 6
Initial pH 6.5
Initial pH 7
Percentage of COD removal at different mixing
ratio of substrates
25 12/17/2018 Department of Civil Engg, AU
Cumulative%ofCODremoval
Time in days
60-40
50-50
40-60
30-70
20-80
Percentage of COD removal at different pH
26 12/17/2018 Department of Civil Engg, AU
%ofCODremoval
Time in days
pH 9
pH 8
pH 7
pH 6
pH 5
COD concentration decrease with increase
Hydrogen production
27 12/17/2018 Department of Civil Engg, AU
CODconcentration(mg/l)
Time in days
Hydrogenyield(ml)
COD concentrations mg/l
hydrogen yield ml
28 12/17/2018 Department of Civil Engg, AU
Area of Immediate and Future Application
Production of electricity, heat and water for various end uses
Industrial applications
Vehicular transportation
Residential applications
Commercial applications, including in telecom towers for providing
backup power
29 12/17/2018 Department of Civil Engg, AU
Novelty and Usefulness
INDIGENOUS ORGANISMS were used to perform the study,
which is isolated from waste itself, therefore no need of
maintaining any pure culture.
Alteration of the conventional anaerobic mechanism (digestion
pathway) to yield more bio hydrogen rather than methane, which
is a green house gas.
Improved Pre-treatment was given in order to suppress the
activity of the methanogenic organisms.
30 12/17/2018 Department of Civil Engg, AU
Stage of the Innovation
Pilot Scale Production Done
31 12/17/2018 Department of Civil Engg, AU
Future Research
Genetically Engineered Microorganisms can be used to improve
the yield of biohydrogen and inhibit methanogenic activity.
Mutation can be done to improve the quantity of bio hydrogen
generation.
Improvement of symbiotic mechanism can also be improvised by
means of introducing other beneficial organisms.
32 12/17/2018 Department of Civil Engg, AU
Market and competitor
Hydrogen is high in energy content as it contains 120.7 kilojoules/gram.
This is the highest energy content per unit mass among known fuels.
Hydrogen can be used for power generation and also for transport
applications.
It is possible to use hydrogen in internal combustion (IC) engines, directly or
mixed with diesel and compressed natural gas (CNG).
Hydrogen can also be used directly as a fuel in fuel cells to produce
electricity.
33 12/17/2018 Department of Civil Engg, AU
Global scenario
34 12/17/2018 Department of Civil Engg, AU
Sl No. Country Scenario
1. Germany Largest demonstrator and pioneer of
hydrogen based applications and
having several hydrogen fueling
stations
2. Iceland Plans to be world's first hydrogen
economy with an annual spending
around $ 30M Hydrogen Freedom
Fuel
3. USA Initiative announced in January 2003
with the budget of US $ 2.2 billion
and implemented by setting up IPHE
in November 2003
4. Japan Started hydrogen fueling stations and
plans to spend $20 billion by 2020
Indian Scenario (H-CNG Dispensing Station)
Faridabad in Haryana Dwarka in New Delhi
35 12/17/2018 Department of Civil Engg, AU
Hydrogen fuelled 3-wheeler Hydrogen-Diesel dual fuel vehicle
36 12/17/2018 Department of Civil Engg, AU
Hydrogen fuelled energy-generator
Use of Hydrogen in a telecom tower
for providing back up power
37 12/17/2018 Department of Civil Engg, AU
Conclusion
The study claims the feasibility of bio-hydrogen synthesis from sugar
industry wastewater using MAUASB reactor.
It minimizes the environmental intervention by the removal of
pollution load to the optimal from sugary wastewater.
The maximum COD removal efficiency was found to be 81% at pH 5.0.
Maximum H2 production (about 272.4ml) of the MAUASB reactor was
found on 8th day maintained at pH value of 5.1.
Successive production faced depletion due to Methanization.
38 12/17/2018 Department of Civil Engg, AU
Acknowledgements and Publications
I sincerely thank UGC for financially supporting the project.
I would like to convey my sincere gratitude to Valliammai
Engineering College for giving me an opportunity to present my
research in front of the jury.
Atun et al. (2017) Synthesis of Bio-Hydrogen Renovated with
Carbohydrate Rich Wastewater, Utilizing Monitoring Based
Agitable UASB Reactor. Bioresource technology, 241(4), 73-84.
39 12/17/2018 Department of Civil Engg, AU
References
• 1. Sreela-C, ImaiT, Plangklang P, Reungsang A. Optimization of key factors affecting
hydrogen production from food waste by anaerobic mixed cultures. Int J Hydrogen Energy
2011; 36:14120-33.
• 2. Kapdan IK, Kargi F. Bio-hydrogen production from waste materials. Enzyme Microb
Technol 2006; 38:569-82.
• 3.Wei J, Liu Z-T, Zhang X. Bio-hydrogen production from starch wastewater and
application in fuel cell. Int J Hydrogen Energy 2010; 35:2949-52.
• 4.Wang J,WanW. Factors influencing fermentative hydrogen production: a review. Int J
Hydrogen Energy 2009; 3:799-811.
• 5. Ravi kumar parihar and Dr. kanjan upadhay”production of bio-hydrogen gas from dairy
industry wastewater by anaerobic fermentation process”IJAR 2016; 2(3): 512-515
• 6. Chen-Yeon Chu a,b,c,*, Zulaicha Dwi Hastuti d,e, Eniya Listiani Dewi e,WidodoWahyu
Purwanto d, Unggul Priyanto” Enhancing strategy on renewable hydrogen production in a
continuous bioreactor with packed biofilter from sugary wastewater”
• 7.Taguchi F, Chang JD,Taguchi S, Morimoto M. Efficient hydrogen production from starch
by a bacterium isolated from termites. J FermentTechnol 1992;73:244–5.
• 8. UenoY, KawaiT, Sato S, Otsuka S, Morimoto M. Biological production of hydrogen from
cellulose by natural anaerobic microflora. J Ferment Bioeng 1995;79:395–7.
40 12/17/2018 Department of Civil Engg, AU
41 12/17/2018 Add a footer

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Biohydrogen synthesis

  • 1. Enhanced Biohydrogen Production Utilizing Carbohydrate Rich Industrial Wastewater Under Anaerobic Microenvironment Atun RoyChoudhury M.E. Scholar (Env Engg) & ResearchAsst Annamalai University (Ramky)
  • 2. Over view Introduction Area of Application What are the Problem Addressed Limitations/Drawbacks of Current Available Products Elaborative Description of the Innovation Area of Immediate and Future Application Novelty and Usefulness Stage of the Innovation Future Research Market and competitor 2 12/17/2018 Department of Civil Engg, AU
  • 4. Waste to Energy Cycle 4 12/17/2018 Department of Civil Engg, AU
  • 5. Wastes suitable for energy production Solid wastes with high carbon content and heating value Waste water with high BOD and COD value Waste gases with high heating value (However, in practice this option is not normally used). 5 12/17/2018 Department of Civil Engg, AU
  • 6. Scenario of Bio-hydrogen Synthesis of bio-hydrogen oil from the organic substrate comprises exclusive advantages like- • High rate of bacterial growth requires low energy input. • No oxygen limitation problems. • Economic feasibility proclaimed by using dark fermentation process etc. • Both pure culture such as Clostridium sp. and mixed cultures of anaerobic bacteria, can used. • Wide range of carbonaceous waste materials can be used such as sugar wastewater, starch wastewater, and dairy waste water etc. 6 12/17/2018 Department of Civil Engg, AU
  • 7. Area of Application Waste to Energy Conversion Clean and Renewable Energy Synthesis 7 12/17/2018 Department of Civil Engg, AU
  • 8. What are the Problem Addressed In the recent era, utmost attention is paid towards exploring the alternative source of energies, being more specific “Green Energies”. The conventional energy sources are non-renewable and subjected to the greater depletion. Apart from this, due to the rapid urbanization and industrial growth quantity of waste generated also got increased. A Sustainable Waste Management technology becomes one of the prime requirement of the present time. The present technology is capable of enlightening two prime aspects of the present waste management scenario namely, • “Waste Treatment and Minimization” • “Waste to Energy Conversion” 8 12/17/2018 Department of Civil Engg, AU
  • 9. Limitations/Drawbacks of Current Available Products Nowadays, universal energy necessities are mostly dependent on fossil fuel. As per the conventional practice, after extracting juice from the sugarcane the MOLASSESAND BAGASSE are disposed unscientifically by open dumping. wastewater from the sugar industries is a “Misplaced Resource” The ultimate goal is “Sustainable Development” Drawbacks • “Leachate formation” • “Ground Water Contamination” • “Change in Soil pH” • “Conversion of primary pollutant to secondary pollutant” • “Air Pollution Due to the Burning of Fossil Fuel” • “Generation of Green House Gases” • “Global warming” 9 12/17/2018 Department of Civil Engg, AU
  • 10. Elaborative Description of the Innovation “Anaerobic Dark Fermentation Process” Pilot scale MAUASB reactor was fabricated and operated for the period of 5 months. The reactor start-up period was minimized using the Seed Sludge. Quantifying the overall bio-hydrogen production, a potential growth was significant between 2nd and 8th day of reactor start up. 10 12/17/2018 Department of Civil Engg, AU
  • 11. Inoculum pre-treatment Screening & Identification 16s rRNA identification Adaptation of strain improvement strategies Characterization of starch and sugar Industry wastewater 11 12/17/2018 Department of Civil Engg, AU
  • 12. Portrayal of the bioreactor system Monitoring Based Agitable Up flow Anaerobic Sludge Blanket Reactor Feed tank has the supply volume of 10 L Total experimental volume of the reactor was 21 L 5L volume meant for gas collection 16L working volume Diameter of 212 mm and height of 460 mm 4 different segments- • Seed sludge introduction • Substrate configuration • Biofilm • Gas collection chamber 12 12/17/2018 Department of Civil Engg, AU
  • 13. Batch Reactor with Different Substrates With Glucose With Sucrose 13 12/17/2018 Department of Civil Engg, AU
  • 14. An overview of the Pilot Scale MAUASB reactor 14 12/17/2018 Department of Civil Engg, AU
  • 15. Computer Compatibility of the Pilot Scale Reactor 15 12/17/2018 Department of Civil Engg, AU
  • 16. Characteristics of raw starch wastewater effluent 16 12/17/2018 Department of Civil Engg, AU S.No. Parameter* Tapioca Starch Effluent 1 pH 4-5 2 Total Suspended Solids 400-800 3 Total Dissolved Solids 1000-1400 4 Chlorides 200-500 5 Sulphates 50-200 6 Oil And Grease 3-12 7 BOD 2200-4000 8 COD 4000-6000 9 Phosphates 30-120 10 Ammonical Nitrogen 4-5
  • 17. Characterization of sugar industry effluent 17 12/17/2018 Department of Civil Engg, AU S.No. Parameter* Sugar effluent 1 pH 6.5-8.8 2 Total solids 870-1950 3 Total suspended solids 220-790 4 Total dissolved solids 400-1650 5 Chlorides 18-40 6 Dissolved oxygen 0-2.0 7 BOD 300-2200 8 COD 1360-2000 9 Sulphate 40-70 10 Oil and grease 60-100
  • 18. Inoculum pretreatment Heat shock treatment (HST) Acid pretreatment / acid enrichment Chloroform pretreatment 18 12/17/2018 Department of Civil Engg, AU
  • 19. 16s rRNA identification for bacterial species Isolation of bacterial genomic DNA. Column purification of genomic DNA Preparation of samples for PCR. PCR set up PCR product analysis PCR product purification Sequencing Data analysis GENOMIC DNA EXTRACTION AGAROSE GEL ELECTROPHORESIS COLUMN PURIFICATION 19 12/17/2018 Department of Civil Engg, AU
  • 20. 20 12/17/2018 Department of Civil Engg, AU
  • 21. Optimization of monitoring parameters pH between 4.5 and 8.5 Standard concentration between 0.2 and 0.6 OD at 600 nm Substrate concentration between 2.5 and 25 g L-1 Temperature range between 250 and 400 C 21 12/17/2018 Department of Civil Engg, AU
  • 22. Adaptation of strain improvement strategies Selection of stable strains Selection of non- foaming strains Selection of strains resistant to the components of the medium Selection of morphologically favourable strains Selection of strains which are tolerant to low oxygen tension Selection of strains based on mutagenic studies namely auxotrophic and mutant resistant to analogues 22 12/17/2018 Department of Civil Engg, AU
  • 23. Bio Hydrogen Production atVarious Substrate Concentrations 23 12/17/2018 Department of Civil Engg, AU CumulativeHydrogenproduction(ml) Time in hours 5 g/l 10 g/l 20mg/l 40 g/l
  • 24. Bio Hydrogen Production atVaried pH Concentrations 24 12/17/2018 Department of Civil Engg, AU cumulativehydrogenproduction(ml) Time in hours Initial pH 5 Initial pH 5.5 Initial pH 6 Initial pH 6.5 Initial pH 7
  • 25. Percentage of COD removal at different mixing ratio of substrates 25 12/17/2018 Department of Civil Engg, AU Cumulative%ofCODremoval Time in days 60-40 50-50 40-60 30-70 20-80
  • 26. Percentage of COD removal at different pH 26 12/17/2018 Department of Civil Engg, AU %ofCODremoval Time in days pH 9 pH 8 pH 7 pH 6 pH 5
  • 27. COD concentration decrease with increase Hydrogen production 27 12/17/2018 Department of Civil Engg, AU CODconcentration(mg/l) Time in days Hydrogenyield(ml) COD concentrations mg/l hydrogen yield ml
  • 28. 28 12/17/2018 Department of Civil Engg, AU
  • 29. Area of Immediate and Future Application Production of electricity, heat and water for various end uses Industrial applications Vehicular transportation Residential applications Commercial applications, including in telecom towers for providing backup power 29 12/17/2018 Department of Civil Engg, AU
  • 30. Novelty and Usefulness INDIGENOUS ORGANISMS were used to perform the study, which is isolated from waste itself, therefore no need of maintaining any pure culture. Alteration of the conventional anaerobic mechanism (digestion pathway) to yield more bio hydrogen rather than methane, which is a green house gas. Improved Pre-treatment was given in order to suppress the activity of the methanogenic organisms. 30 12/17/2018 Department of Civil Engg, AU
  • 31. Stage of the Innovation Pilot Scale Production Done 31 12/17/2018 Department of Civil Engg, AU
  • 32. Future Research Genetically Engineered Microorganisms can be used to improve the yield of biohydrogen and inhibit methanogenic activity. Mutation can be done to improve the quantity of bio hydrogen generation. Improvement of symbiotic mechanism can also be improvised by means of introducing other beneficial organisms. 32 12/17/2018 Department of Civil Engg, AU
  • 33. Market and competitor Hydrogen is high in energy content as it contains 120.7 kilojoules/gram. This is the highest energy content per unit mass among known fuels. Hydrogen can be used for power generation and also for transport applications. It is possible to use hydrogen in internal combustion (IC) engines, directly or mixed with diesel and compressed natural gas (CNG). Hydrogen can also be used directly as a fuel in fuel cells to produce electricity. 33 12/17/2018 Department of Civil Engg, AU
  • 34. Global scenario 34 12/17/2018 Department of Civil Engg, AU Sl No. Country Scenario 1. Germany Largest demonstrator and pioneer of hydrogen based applications and having several hydrogen fueling stations 2. Iceland Plans to be world's first hydrogen economy with an annual spending around $ 30M Hydrogen Freedom Fuel 3. USA Initiative announced in January 2003 with the budget of US $ 2.2 billion and implemented by setting up IPHE in November 2003 4. Japan Started hydrogen fueling stations and plans to spend $20 billion by 2020
  • 35. Indian Scenario (H-CNG Dispensing Station) Faridabad in Haryana Dwarka in New Delhi 35 12/17/2018 Department of Civil Engg, AU
  • 36. Hydrogen fuelled 3-wheeler Hydrogen-Diesel dual fuel vehicle 36 12/17/2018 Department of Civil Engg, AU
  • 37. Hydrogen fuelled energy-generator Use of Hydrogen in a telecom tower for providing back up power 37 12/17/2018 Department of Civil Engg, AU
  • 38. Conclusion The study claims the feasibility of bio-hydrogen synthesis from sugar industry wastewater using MAUASB reactor. It minimizes the environmental intervention by the removal of pollution load to the optimal from sugary wastewater. The maximum COD removal efficiency was found to be 81% at pH 5.0. Maximum H2 production (about 272.4ml) of the MAUASB reactor was found on 8th day maintained at pH value of 5.1. Successive production faced depletion due to Methanization. 38 12/17/2018 Department of Civil Engg, AU
  • 39. Acknowledgements and Publications I sincerely thank UGC for financially supporting the project. I would like to convey my sincere gratitude to Valliammai Engineering College for giving me an opportunity to present my research in front of the jury. Atun et al. (2017) Synthesis of Bio-Hydrogen Renovated with Carbohydrate Rich Wastewater, Utilizing Monitoring Based Agitable UASB Reactor. Bioresource technology, 241(4), 73-84. 39 12/17/2018 Department of Civil Engg, AU
  • 40. References • 1. Sreela-C, ImaiT, Plangklang P, Reungsang A. Optimization of key factors affecting hydrogen production from food waste by anaerobic mixed cultures. Int J Hydrogen Energy 2011; 36:14120-33. • 2. Kapdan IK, Kargi F. Bio-hydrogen production from waste materials. Enzyme Microb Technol 2006; 38:569-82. • 3.Wei J, Liu Z-T, Zhang X. Bio-hydrogen production from starch wastewater and application in fuel cell. Int J Hydrogen Energy 2010; 35:2949-52. • 4.Wang J,WanW. Factors influencing fermentative hydrogen production: a review. Int J Hydrogen Energy 2009; 3:799-811. • 5. Ravi kumar parihar and Dr. kanjan upadhay”production of bio-hydrogen gas from dairy industry wastewater by anaerobic fermentation process”IJAR 2016; 2(3): 512-515 • 6. Chen-Yeon Chu a,b,c,*, Zulaicha Dwi Hastuti d,e, Eniya Listiani Dewi e,WidodoWahyu Purwanto d, Unggul Priyanto” Enhancing strategy on renewable hydrogen production in a continuous bioreactor with packed biofilter from sugary wastewater” • 7.Taguchi F, Chang JD,Taguchi S, Morimoto M. Efficient hydrogen production from starch by a bacterium isolated from termites. J FermentTechnol 1992;73:244–5. • 8. UenoY, KawaiT, Sato S, Otsuka S, Morimoto M. Biological production of hydrogen from cellulose by natural anaerobic microflora. J Ferment Bioeng 1995;79:395–7. 40 12/17/2018 Department of Civil Engg, AU
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