Production of Biobutanol from Jatropha Seed Cake. Jasmine Isar
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1 Production of Biobutanol from Jatropha Seed Cake Jasmine Isar
2 RIL Overview The Reliance Group, founded by Dhirubhai H. Ambani ( ), is India s largest private sector enterprise with businesses in the energy and materials value chain, and having annual revenues in excess of US$ 68 billion. The flagship company, Reliance Industries Limited ( RIL ), is a Fortune Global 500 Company and enjoys global leadership in its key product lines. RIL s Jamnagar refinery complex has the world s largest refining capacity (1.3 million bpsd) at a single location and has an impeccable track record of safe and reliable operations. RIL is continuing its efforts to be a creator of intellectual property and is driving a technology transformation agenda that promotes scientific and technical excellence by fostering an eco-system for creativity and innovation. 2
3 Disclaimer Any statement, opinion, prediction, comment, or observation made in this presentation/publication are those of the presenter/author only and in no condition should be construed necessarily representing the policy or intent of Reliance Industries Ltd. (RIL). The information presented herein is of the presenter/author s own and in no way RIL shall attract any liability for any inconsistency or irregularity in terms of accuracy completeness, veracity, or truth of the content of the presentation/publication. In addition, RIL shall not be liable for any copyright infringement and misrepresentation for the presented content as the content, in good faith, is presumed to be a creation of presenter s/author s own mind. The scope of this presentation/publication is strictly for knowledge sharing purposes and not necessarily to provide any advice or recommendation to the audience/readers. Any endorsement, recommendation, suggestion, or advice made by the presenter/author shall be in his personal capacity and not in professional capacity as an employee of RIL. Any person acting on such endorsement, recommendation, suggestion, or advice will himself/herself be responsible for any injury/damages. 3
4 Energy Crises and Alternative Fuels Dismal scenario of fossil fuel availability Perils of petroleum resource exhaustion Stringent environmental legislation 4
5 Alternative Fuels Properties Methanol Ethanol Butanol Gasoline Molecular CH 3 OH C 2 H 5 OH C 4 H 9 OH Many formula Energy content (per gallon) Motor octane number 63k Btu 78k Btu 110 k Btu 115k Btu Ethanol may have the early mover s advantage, but the race is not yet over, butanol is an emerging biofuel 5
6 Butanol v/s Other Fuels Butanol has higher energy content Six times less evaporative Non-corrosive 100% substitutable for gasoline No engine modification Butanol is a higher grade fuel in many respects, the only challenge is to produce it enough to meet the world s insatiable demand 6
7 Biological Route to n-butanol Source : Ramey and Yang, DOE Report,
8 Limitations of Butanol Fermentation Low yields of butanol Product toxicity to the bacterium Poor recovery Culturing and handling of anaerobes Butanol is toxic to the bacterial system at 1.3% concentration 8
9 Global Players Source: -Players.html 9
10 Economic Viability The economic viability of n-butanol fermentation is governed mainly by three factors High product titer (achievable by overcoming solvent toxicity) Raw material cost (using lignocellulosic biomass) Solvent recovery costs (if titers can be raised from 12 to 19 gl -1, cost of recovery can be cut down to half) 10
11 Butanol toxicity Butanol toxicity is the biggest challenge in butanol fermentation Butanol tolerance can be key to high butanol titers 11
12 Strain Improvement Chemical mutagenesis was carried out to generate butanol tolerant strains Mutants were screened for solvent tolerance in medium with varying concentrations of n-butanol 12
13 Butanol Tolerance Mutant strain was tolerant upto 3.0% (v/v) of butanol Wild Type Strain Mutant Strain 13
14 Mechanism of Butanol Tolerance 1. Altering the lipid composition Wild type strain Myristic (C14:0) and Palmitic acid (C16:0) were found to be present in solvent tolerant mutant strain Mutant strain Oleic acid (C18:1) conc. is high in Standard FAMEs the solvent non-tolerant wild type strain 14
15 Mechanism of Butanol Tolerance 2. Over expression of the heat shock proteins, HSP 60 Solvent tolerant mutant strain showed higher levels of GroEL A kda B Western Blot showing GroEL expression in mutant (A) and wild-type (B) Lanes 2 5 protein Lane 1, standard GroEL Lane 2, 120 h Lane 3, 96 h Lane 4, 72 h Lane 5, 48 h 15
16 Mechanism of Butanol Tolerance P-glycoprotein binds a large number of lipophilic compounds, such as antibiotics, dyes, organic solvents and mediates the energy dependent efflux of these toxic compounds from the bacterial cells Rhodamine G accumulation in wild-type & mutant Rhodamine 6G (dye) is a P- glycoprotein substrate Rhodamine 6G P-glycoprotein is an efflux pump (ABC transporter) of multidrug resistance family 16
17 Lignicellulosic Biomass For Biofuels Another challenge is the cost of raw material which can be mitigated by using ligno-cellulosic biomass as the feedstock Corn stover Switch Grass Jatropha Seeds 17
18 Lignocellulosic Biomass used for Biofuels Company Microbe Molecule Biomass Butamax (DuPont/BP) Clostridum sp., E.coli Iso-butanol, n- butanol Corn Green Biologics Clostridium sp. n - butanol Lignocelluloses Butalco Yeast Unclear Lignocelluloses Gevo Yeast, E.coli Iso-butanol Corn Cobalt Biofuels Clostridium sp. n- butanol Wood pulp, sugarbeet Tetra Vitae Clostridium sp. n- butanol variable Source: -Players.html 18
19 Why Jatropha? Jatropha Is Better For Bio-fuel Production Hardy nature Short gestation time of about 3 years Productive life of years Not browsed by animals Adaptability to varied agro-climatic conditions and soil type Drought resistance Non competing with food crops for land and water sources 19
20 Optimization of Jatropha Seed Cake (JSC) Concentration Acid pretreated JSC hydrolysates (2%, 5%, 7% &10% w/v ) examined for butanol production Mutant grown in JSC (7 %w/v) with 2 % glucose yielded 13.2 g L 1 butanol 20
21 Scale-up of Butanol Production using JSC (3L) 14.8 g L 1 of n-butanol in 96 h Acetone : Butanol : Ethanol 2.6: 6.6:
22 Scale-up of Butanol Production using JSC (15L) A butanol titer of 18.6 g L -1 obtained in 72 h with a productivity of 0.26 g L -1 h -1 22
23 Butanol Titers Using Biomass Biomass Hydrolysate Additives in medium Butanol titer (gl -1 ) Productivity (gl -1 h -1 ) Yield (g/g) Wheat straw (Pfromm et al. 2010) Barley straw (Qureshi et al. 2010a) Corn Strover (Qureshi et al. 2010b) Switch grass (Qureshi et al. 2010b) Rice Straw (Ranjan et al. 2013) Corn Fiber (Qureshi et al. 2008) Glucose, YE, Vitamin Sol Glucose, YE, Vitamin Sol 12.7 in 72h in 68h Glucose 10.4 in 96h Glucose 9.55 in 84h None 13.5 in 12 days Glucose, YE, Vitamin Sol 6.4 in 88 h Jatropha Seed cake (This study) Glucose, YE, Peptone 18.6 in 72 h
24 Conclusion Solvent-tolerant mutant strain was developed Increasing n-butanol productivity using cheap substrate JSC, a potential lignocellulosic substrate The process could be successfully scaled up at 15 L Entire fermentation process was run in a single batch mode 24
25 Highlights Production of high yield of butanol (18.6 gl -1 ) in a single batch process using jatropha seed cake as the biomass Highly solvent tolerant mutant No stripping of butanol produced during fermentation 25
26 Forward Path Optimization Strategies Use of Flexible feedstocks Efficient pre treatment method Scale up of the process up to pilot size Developing down stream processing of butanol Recovery of byproducts (CO 2, H 2 ) 26
27 Acknowledgements Dr. Vidhya Rangaswamy Harshvardhan Joshi Dr. Sanjeev Katti Reliance Life Sciences Reliance Industries Ltd. 27
28 Thank You! 28
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