Bioreactors for production and recovery of medium chain carboxylates from organic biomass are disclosed. Methods for improved production and recovery of medium chain carboxylates from organic biomass are also disclosed. The bioreactors can be used as a chain-elongation bioreactor, and a method of use thereof results in improved production and recovery of medium chain carboxylates from organic biomass. The bioreactor includes a shell defined by one or more walls and a length, and a plurality of porous hollow fiber membranes placed inside the reactor for continuous liquid-liquid extraction, as well as granular activated carbon (GAC) as biocarriers. The plurality of hollow fiber membranes is mounted such that a percentage of the length of the shell remains unoccupied by the plurality of porous hollow fiber membranes.

Provided are medium culturing and observing device and gas circuit control method thereof. Medium culturing and observing device includes housing body, culture box body, culture turntable, heating component, rotation module, microscopic imaging module, moving module, and gas circuit system. By providing culture turntable and moving module, culture dish is driven to rotate to observation window position by rotating turntable, and imaging is performed through microscopic imaging module. Since position of culture dish may not be perfectly aligned with center of observation window, moving module can drive microscopic imaging module to move, thereby aligning microscopic imaging module with culture dish. Therefore, culture turntable only needs to rotate once to transfer culture dish that needs to be observed to observation window, thus reducing rotation frequency of culture turntable, reducing vibrations affecting medium.

The embodiments of the present application relate to a photosynthetic bioreactor system in the field of bioreactors. The system includes at least one bioreactor with a transparent cultivation region for photosynthetic microorganisms; a conditioning device for producing ideal liquid culture medium; a collection device for recovering organic matter from the bioreactor; and a nano-bubble generating device for converting carbon dioxide-containing gas into minute bubbles for liquid introduction. The bioreactor includes a culture medium inlet, a culture medium outlet, and a gas inlet communicating with the transparent cultivation region. The conditioning device connects to each bioreactor's culture medium inlet, the collection device connects to each culture medium outlet, and the nano-bubble generating device connects to each air inlet. The transparent cultivation region has a thickness less than a preset dimension to enable light penetration.

A method includes placing a sample of cells, tissue, or an organ into an oxygen imaging system, circulating a humidified gas mixture around the tissue or organ, circulating conditioned air through the oxygen imaging system to maintain a temperature around the sample, and acquiring a three-dimensional oxygen map of the sample. The oxygen map provides a quantitative measure of cell viability and functionality.

A method of growing algae in a cultivation container is disclosed. In some the method may include: circulating, via the cultivation container, in a closed loop, a first predetermined amount of gas mixture comprising a first type of gas and at least one second type of gas, the gas mixture may enter the container via one or more entrance spargers and exit via at least one exit pipe, the first type of gas may contain CO.sub.2 at a known first amount; receiving signal indicative of the amount of CO.sub.2 or H.sub.2S, in the gas mixture; when the signal indicates that the amount of CO.sub.2 drops below a first predetermined level or when the signal indicates that the amount of H.sub.2S rises above a first predetermined level, extracting a second predetermined amount of the gas mixture from the cultivation container: and adding an amount of the first type of gas to the gas mixture, equal to the second predetermined amount.

Provided is a reaction apparatus for comprehensively measuring biodegradability of a material, comprising a device frame, an electrical control cabinet and a reaction chamber monomer. The upper side of the reaction chamber monomer is a reaction chamber body, and the lower part is a material receiving trolley. The top of the reaction chamber body is sealed by a chamber cover. A side wall is pasted with an electric heating plate and a thermal insulation cotton. A stirring paddle is arranged inside. An air inlet and an air outlet are respectively provided on a front and a rear wall. A discharging mechanism is located below. The electrical control cabinet separately controls the reaction conditions of each reaction chamber monomer. The present invention further relates to a use method thereof, which can realize the biodegradability evaluation in such three aspects as material degradation rate, disintegration rate and ecological non-toxicity test.

A method of converting CO.sub.2 gas produced during industrial processes comprising contacting methanogenic archaea with the CO.sub.2 gas under suitable conditions to produce methane.

The present invention provides a membrane bioreactor for deep-sea cold seeps. The bioreactor is used for simulating a biomembrane growth process during anaerobic oxidation of methane (AOM) in the cold seeps and monitoring changes of environmental conditions thereof. The present invention further provides an online environmental parameter measurement system for a membrane biological reaction in the deep-sea cold seeps. The system includes a fluid supply unit used for generating saturated methane fluid and injecting the saturated methane fluid into the membrane bioreactor for the deep-sea cold seeps at a microflow, and a pressurization system used for ensuring stability and consistency of internal environmental pressure of the system in a simulation process.

This invention is a bioreactor device adapted to improve air quality. The bioreactor consists of a base that houses the mechanical components and a vessel that holds liquid mixture of water, a photosynthetic microorganism, and a media. The bioreactor has an air pump which draws room air into the base of the device through an air filter. The bioreactor bubbles the air through the liquid mixture. Photosynthesis converts the carbon dioxide to oxygen.

Disclosed is a process and system for generating hydrogen from carbon dioxide. The process and system for generating a hydrogen gas stream from a carbon dioxide gas stream comprises converting a first waste carbon dioxide gas stream to an organic feedstock using an algal source in a photosynthesis step. The organic feedstock is then converted using an organism to the hydrogen gas stream and gaseous by-products in a biodecomposition step. The generated hydrogen gas may then be collected.