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The document compares the harvesting performances of three different flocculation methods: aluminum chloride (AlCl3) addition, pH adjustment, and combined flocculation using AlCl3 and a bioflocculant. The combined method achieved the highest initial sedimentation rate and flocculation efficiency, but required the most chemicals and time. pH adjustment performed better than AlCl3 addition alone in terms of cost and chemicals required, though its harvesting time was longer. Overall, the combined method was most effective but least ideal due to its high chemical needs and long harvesting time.
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The Gene Ontology & Gene Ontology Annotation resources
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Biopolymers Information
Biopolymer, Biogums, Bio-polysaccharide, Bio-surfactant, Bio-lubricant, Bio-detergent, Bio-flocculant, Bio-adhesive, Chitin, Chitosan, Microbial, Cellulose, Production, Pectin, Lignin, Polyamide, Microbiological, Biotechnology, World, Market, Demand, Xanthan, Dextran, Scleroglucan, Company, Commercial, Applications, Advantages, Chemical structure, Properties, Purification, Economics, Company, Manufacturer, Jogdand.
For soft copy of this document please feel free to contact us on info@biotechsupportbase.com or snjogdand@gmail.com
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PowerPoint Presentation for Microalgae Undergraduate Research Project at UPRA...
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Microbial catalysis of syngas fermentation into biofuels precursors - An expe...
Search for environment-friendly sustainable energy sources is of global interest due to continuous depletion of fossil fuels resources and excessive carbon dioxide emissions. Syngas fermentation is one of the promising sustainable alternative for liquid biofuel and chemical production from energy content wastes/byproducts. This study mainly focuses on acetic acid and ethanol production via fermentation, using hydrogen and carbon dioxide as substrates to mimic syngas. A laboratory scale, batch fermentation was performed at different headspace pressure ranged from 0.29 to 1.51 bar, 1200 rpm stirrer speed, and 22±1.4ºC.
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Acetic acid and ethanol were dominant final product whereas other organic acids were almost constant and insignificant throughout the experiment. This implies that the microbial fermentation of hydrogen and carbon dioxide at headspace pressure ranged from 0.29-1.51 bar, 1200 rpm stirrer speed, and 22±1.4ºC, can be performed with digested food waste sludge for efficient acetic acid and ethanol production.
Aerobic stability of crimped wheat grain manipulated by additive treatments d...
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This document summarizes research on biogas production from chicken manure through anaerobic digestion. The researchers conducted a full-scale analysis of biogas production from chicken manure over 217 days. They found that an acclimation period is required for the anaerobic digestion process to adapt to the manure feedstock. During acclimation, biogas production and process efficiency decreased due to ammonium inhibition but later stabilized. The study determined that chicken manure has the potential to produce 312±23 L of methane per kg of volatile solids added. Once adapted, the anaerobic digestion system was able to process over 5,000 tons of manure with 93% efficiency at an organic loading rate of 3.14
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This document examines the process parameters for the biotransformation of benzaldehyde to L-phenylacetylcarbinol (L-PAC) using the yeast Torulaspora delbrueckii. The maximum L-PAC yield of 331 mg/100 ml was obtained with 8 hours of reaction at 30°C using 600 mg of benzaldehyde. Growing the yeast in 3% glucose reduced the reaction time to 120 minutes. Addition of 0.6% acetaldehyde increased the L-PAC yield to 450 mg%. Semi-continuous feeding of benzaldehyde and acetaldehyde produced 683 mg L-PAC/100 ml. The cell mass was reusable for biotransformation up to nine times when substrate concentrations were
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1) Torulaspora delbrueckii was used to biotransform 30g of benzaldehyde into 22.9g of L-phenylacetylcarbinol (L-PAC) in a 5L stirred tank reactor.
2) L-PAC was then converted to ephedrine in two microwave-assisted steps: first L-PAC was transformed to 2-(methylimino)-1-phenyl-1-propanol, then this was reduced to ephedrine.
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Research Presentation for Moratuwa Engineering Research Conference, 2019
The document summarizes a presentation on developing an enzymatic hydrolysis pre-treatment strategy to improve batch anaerobic digestion of wastewater from desiccated coconut processing plants. It discusses conducting experiments with enzymatic hydrolysis using lipase, initial pH adjustment, and varying inoculum to substrate ratios. The highest initial biogas production rates and biomethane yields were achieved with wastewater pre-treated with lipase and when the initial pH and inoculum to substrate ratio were optimized. While inhibition occurred initially due to lipids, digestion was recovered after 60 days, indicating the inhibition was temporary rather than permanent.
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The document summarizes research on the thermal decomposition of lignin in the presence of a hydrogen donor solvent (2-propanol). Key findings include:
1) The maximum bio-oil yield of 42 wt.% was achieved at a reaction time of 15 minutes. Further increasing the reaction time did not significantly increase yields.
2) Analysis showed the reaction produced short-chain alkylphenol compounds as the 2-propanol solvent donated hydrogen atoms, reducing unsaturated bonds on the aromatic rings.
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- 1. Comparison of harvesting performances using three different flocculation methods Reporter : Rifka Aisyah Advisor : Professor Jo-Shu Chang Date : 2011.05.18
- 2. Flocculation Experiment Condition Combined flocculation using AlCl 3 and DYU500 bioflocculant Condition Description Strain Chlorella vulgaris ESP-31 Medium Basal Nitrate 0.25 N Carbon source 2% CO 2 ; 0.2 vvm Flocculation method AlCl 3 addition followed by DYU500 addition Initial biomass concentration 1.95 g/L – 2.46 g/L Cultivation day 18 days Working volume (mL) 1000 mL Initial pH 6.65 – 6.71 Lipid content (%) (to be tested)
- 3. Microalga growth on basal medium Criteria Description Species Chlorella vulgaris ESP-31 Culture volume 5 L Agitation rate 150 rpm Cultivation day 18 days The highest biomass concentration 2.10 g/L
- 4. Comparison of large scale harvesting performance under different flocculation methods Initial sedimentation rate AlCl 3 addition pH adjustment Combined flocculation Higher Twofold higher Threefold higher Microalga concentration (g/L) AlCl 3 concentration (g/L) Initial sedimentation rate (%/min) 1.92 – 2.11 0.0 0.21 0.5 3.81 0.7 9.08 Microalga concentration (g/L) pH value Initial sedimentation rate (%/min) 1.92 – 2.35 7.08 0.10 11.00 2.58 12.00 6.28 Microalga concentration (g/L) Condition Initial sedimentation rate (%/min) 1.95 – 2.46 Blank 0.85 0.50 g/L AlCl 3 + 0.20 g/L PGA 11.19 0.70 g/L AlCl 3 + 0.20 g/L PGA 18.30
- 7. Dose of chemicals and bioflocculant required for each flocculation method The price of NaOH was about one-thirds of the price of AlCl 3 per gram. It can be concluded that flocculation using AlCl 3 was more expensive than flocculation using pH adjustment pH adjustment method pH value NaOH concentration (g/L) 11.00 0.68 12.00 1.44 AlCl 3 addition method AlCl 3 concentration (g/L) 0.50 0.70 Combined method AlCl 3 concentration (g/L) DYU500 bioflocculant (g/L) 0.50 0.20 0.70 0.20