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Related Concept Videos

Bioreactor Controls-II01:18

Bioreactor Controls-II

54
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the...
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Bioreactor Controls-I01:28

Bioreactor Controls-I

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Maintaining optimal conditions within fermenters is essential for maximizing microbial productivity and ensuring process efficiency. This lesson focuses on key parameters—temperature, foam, pH, carbon dioxide, oxygen, and pressure—and their precise measurement and control strategies in fermentation systems.Temperature ControlTemperature regulation is critical due to the exothermic nature of many fermentation processes. In small laboratory fermenters, temperature is commonly...
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Microbial Bioremediation of Plastics01:28

Microbial Bioremediation of Plastics

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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
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Bioplastics01:27

Bioplastics

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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Bioreactor Design and Operational System01:29

Bioreactor Design and Operational System

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Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
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Biofuels01:25

Biofuels

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The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
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Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor
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Application of biomass pyrolytic polygeneration technology using retort reactors.

Haiping Yang1, Biao Liu1, Yingquan Chen1

  • 1State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.

Bioresource Technology
|October 18, 2015
PubMed
Summary
This summary is machine-generated.

Biomass pyrolytic polygeneration in retort reactors efficiently converts agricultural waste into valuable products like charcoal and biogas. This technology is economically viable, offering a profitable method for sustainable biomass utilization.

Keywords:
BiogasBiomass pyrolytic polygenerationCharNPVRetort reactor

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Area of Science:

  • Chemical Engineering
  • Renewable Energy
  • Biomass Conversion

Background:

  • Biomass pyrolytic polygeneration offers a sustainable route for waste valorization.
  • Retort reactors are suitable for efficient biomass conversion processes.
  • Understanding product properties and economic feasibility is crucial for commercialization.

Purpose of the Study:

  • To assess the application status and utilization potential of biomass pyrolytic polygeneration.
  • To characterize the properties of major products derived from biomass pyrolysis.
  • To evaluate the economic viability of commercial-scale biomass processing factories.

Main Methods:

  • Investigated properties of charcoal, biogas, woody tar, and woody vinegar.
  • Analyzed the economic viability of a commercial factory with a capacity of 3000t biomass per year.
  • Calculated the lower heating values (LHV) of charcoal and biogas.

Main Results:

  • A factory processed 3000t biomass/year into 1000t charcoal, 950,000Nm(3) biogas, 270t woody tar, and 950t woody vinegar.
  • Charcoal (31MJ/kg) and biogas (12MJ/m(3)) show potential as commercial fuels.
  • Woody tar is rich in phenols; woody vinegar contains water and acetic acid.

Conclusions:

  • Biomass pyrolytic polygeneration using retort reactors is a promising technology for converting biomass into high-value products.
  • The process is economically profitable, with initial investments recoverable over the factory's lifetime.
  • This technology supports sustainable resource management and the circular economy.