Process for producing biogas from a digestate obtained from a digester, said process comprising a step of recovering the digestate at the outlet of a digester, a post-digester or a storage tank; a step of separating the digestate into a solid digestate and a liquid digestate; a step of introducing the solid digestate into at least one dosed tank; a step of anaerobic digestion in the tank with neither heating nor mixing; and a step of recovering the biogas at the tank outlet.

There is provided a biogas flux chamber constructed in one embodiment from a metal can with an open bottom and an epoxy interior coating. The chamber is inserted into the soil to allow influx of soil gases. The lid includes a sampling septum and a vent tube to prevent pressure build-up when the lid is in place which allows for an increase in interior gas concentrations. The rubber sampling septum is installed in a hole in the lid. The vent tube is constructed using flexible copper tubing inserted through the lid and secured using a bulkhead-fitting, and rubber O-ring to seal the insertion hole. The copper tubing is bent to form a double-curved ‘C’ shape which positions the open ends of the tube above and below the lid surfaces.

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.

The invention relates to a device for incubating cultures, comprising a culture chamber storing the cultures, the cultures being fumigated with an incubation gas. The invention is characterized in that the incubation gas source is used when incubating the cultures with the incubation gas source which is free of liquid incubation gas.

The invention relates to a bioprocessing system having a main line (2) for conduction of a main flow (3) of a liquid, in particular biological, medium (45), having a main flow pump (5) for generation of the main flow (3) and having a system part (46) connected to the main line (2). What is proposed is that the bioprocessing system (1) comprises a powder transfer system (8) for metered delivery, in particular dust-free metered delivery, of an additive (47) and a feed line (9) which is connected to the powder transfer system (8) and which opens into the main line (2) at a feed point (10) and which comprises a return flow preventer (11) for prevention of a return flow of liquid medium (45), that the powder transfer system (8) feeds the additive (47) into the feed line (9) in powder form and drives it toward the feed point (10) by means of a pressurized transport gas (12) and that at least some of the fed additive (47) is input into the liquid medium (45) within the main line (2) downstream of the feed point (10) before the liquid medium (45) enriched with the additive (47) passes through or reaches the system part (46) connected to the main line (2).

The gas collection device includes a constant temperature chamber whose interior is maintained at a set temperature; a culture flask unit located inside the constant temperature chamber and culturing bacteria therein; a mass flow controller located outside the constant temperature chamber and connected to the culture flask unit through an injection flow path to control a gas injected into the culture flask unit through the injection flow path; and an impinger located outside the constant temperature chamber and connected to the culture flask unit through a discharge flow path to receive a gas discharged from the culture flask unit through the discharge flow path in real time.

The present invention relates to a gas collection device and is directed to a gas collection device for collecting a gas which is generated while microorganisms are cultured in a super absorbent polymer product. The gas collection device may comprise a constant temperature chamber having an interior that is configured to be maintained at a set temperature; a culture flask unit located inside the constant temperature chamber and configured to culture a bacteria therein; an adsorption unit located outside the constant temperature chamber and configured to receive a gas inside the culture flask unit; a pump unit connected to a rear end of the adsorption unit and configured to suck the gas inside the culture flask unit into the adsorption unit; and a mass flow controller located outside the constant temperature chamber and configured to control a flow rate of the gas sucked into the adsorption unit.

In some variations, a UV-sterilizable bioreactor system comprises: a chamber configured to carry out a reaction; a component configured for introducing a gas into the chamber; and one or more UV light sources configured to expose ultraviolet light to surfaces within the chamber. Some variations provide a method of cleaning and sterilizing a bioreactor, comprising: providing a bioreactor system with a chamber to carry out a reaction, a component for introducing a gas into the chamber, and one or more UV light sources to expose ultraviolet light to chamber surfaces; cleaning the chamber; and exposing the chamber to UV radiation to sterilize the chamber. The disclosed technology is a fundamental advance in the field of sparged bioreactors, for many types of commercial fermentations. The bioreactor may incorporate materials that are expressly incompatible with steam sterilization, which allows for the use of lower-cost materials, among many other benefits from UV sterilization.

A system comprising a collocated thermal plant, water source, CO.sub.2 source and biomass growth module is disclosed. A method of improving the environment by utilizing the system is disclosed.

Disclosed herein are devices, methods and compositions for making and using microfluidic devices comprising making a microfluid device comprising one or more channels; and coating at least a portion of an interior surface of at least one channel, wherein one or more gradients are formed by simultaneously introducing into the device a first cellular culture media composition having a certain concentration of a gas, an active agent or both and a second composition having a concentration of a gas, an active agent or both that is/are different from that of the first composition. Such devices are used to investigate cellular responses to physiological states and active agents.