4results about "Biological synthesis" patented technology

Provided is a method for reusing an adsorbent which can stably exhibit purification ability by regenerating a used absorbent, in order to keep the composition of a purified syngas constant. The present invention concerns a method for regenerating a zeolite adsorbent which adsorbs a carbon dioxide gas from a syngas comprising the carbon dioxide gas and reduces the concentration of the carbon dioxide gas in the syngas, comprising: a step of recovering a used zeolite adsorbent; a step of calcining the used zeolite adsorbent at a temperature of 300 °C to 600 °C in an oxygen atmosphere to produce a regenerated zeolite adsorbent; and a step of reusing the regenerated zeolite adsorbent.

This invention provides a method for producing medium-chain fatty acids (MCFAs) from straw based on DES additives, belonging to the field of MFA extraction technology. This method uses DES with choline chloride as the hydrogen bond acceptor to treat agricultural waste straw, improving the utilization rate of agricultural waste and promoting the anaerobic fermentation process for MFA production. Pretreatment before anaerobic fermentation and the thermal shock effect during anaerobic fermentation improve the depolymerization of straw, inhibit methanogenic bacteria in mesophilic anaerobic fermentation, suppress methane production during continuous anaerobic fermentation, and ensure maximum utilization of straw for MFA production. This method solves the problems of methanogenesis tendency, incomplete substrate utilization, insufficient electron donors during acid production, and low fermentation efficiency in the anaerobic fermentation of straw for MFA production.

A carbon dioxide-neutral biodigester plant includes a biodigester for carbon dioxide-neutral, single-stage or multi-stage production of biogas by fermentation of biomass in a fermentation liquid agitated in presence of elemental hydrogen, hydrogenotrophic and methanogenic archaea, and activated carbon masses, a source of ammonia connected to a first ammonia line, an ammonia cracker to produce hydrogen or a hydrogen-nitrogen mixture by catalytic cracking of ammonia, a first hydrogen line for feeding the produced hydrogen or the hydrogen-nitrogen mixture directly into the biodigester, and a treating device for treating activated coal masses with hydrogen at higher pressure. The treating device includes a pressure line and a treating spray lance. Hydrogen-containing activated coal masses configured as spray cones are injected into the fermentation liquid of the biodigester.

A system comprising a collocated thermal plant, water source, CO2 source and biomass growth module is disclosed. A method of improving the environment by utilizing the system is disclosed.