Recovery from biomass

Recovery of volatile organic flavor compounds (ethyl acetate, EA ethyl propionate, EP ethyl butyrate, EB) Product recovery from biomass fermentation processes... 

Vane LM. A review of pervaporation for product recovery from biomass fermentation processes. J. Chem. Tech. Biotech. 2005 80 603-629. 

In a discussion on downstream processing of alkaloids produced by plant cell biotechnology, two quite different cases can be distinguished, namely, product stored in the biomass and product excreted by the biomass. The first case is comparable with the classic production of alkaloids from plant materitd, although specific problems could arise from the character of the cellular biomass. In the second case a variety of advanced separation techniques could be used. A typical example from plant cell biotechnology is the forced release of alkaloids. In the following sections product recovery from biomass as well as product release and product recovery from spent media are discussed. 

Product recovery from biomass fermentation processes... 

Figure 7.4 Schematic of downstream processing for PHA recovery from biomass.

Coal used in power stations has the potential to be partly replaced by fuels derived from pre-treated plastics and paper waste, reducing both dependency on fossil fuels and reliance on landfill. APME reports on a project in the Netherlands which it co-sponsored to develop a substitute fuel from plastics. The environmental assessment of the project compared the environmental impacts of coal substitution with other plastics recovery methods, including gasification in feedstock recycling and energy recovery from plastics waste in cement kilns. The study also compared coal substitution with the generation of power from burning biomass. 

The method of pure polymer recovery from the biomass prior to characterization can influence the molecular weight of the polymer significantly. Extraction of PHB-bacterial cells with organic solvents yields polymers with higher molecular weight compared to sodium hypochorite treatment [44-46]. Pretreatment of the biomass with a surfactant prior to hypochlorite digestion... 

Proteins produced in plant cells can remain within the cell or are secreted into the apoplast via the bulk transport (secretory) pathway. In whole plants, because levels of protein accumulated intracellularly, e. g. using the KDEL sequence to ensure retention in the endoplasmic reticulum, are often higher than when the product is secreted [58], foreign proteins are generally not directed for secretion. However, as protein purification from plant biomass is potentially much more difficult and expensive than protein recovery from culture medium, protein secretion is considered an advantage in tissue culture systems. For economic harvesting from the medium, the protein should be stable once secreted and should accumulate to high levels in the extracellular environment. 

Hustedt, H., Kroner, K. H. and Papmichael, N. Proc. Biochem. (October, 1988) 129-137. Continuous cross-current aqueous 2-phase extraction of enzymes from biomass - automated recovery in production scale. 

A high recovery yield of plant proteins from biomass depends on extensive cell maceration. The more cell walls are disrupted, the more protein can be recovered (12). Therefore, a pretreatment that disrupts plant cells may be useful in protein recovery processes. 

Biomass Recovery from Seafood and Cheese Manufacturing Industries... 

The Hamburg process was also used for oil and gas recovery from oil shale, oil sand, and biomass such as wood (flash pyrolysis), lignin, bark, oil seed, and fat [6-8]. 

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