Abstract: The disclosure provides a system and a process for injecting and uniformly distributing a liquid into a fermentation broth in a bioreactor for maintaining stable condition within the fermentation broth. The system includes a downcomer section which contains two or more circular pipe conduits extending from a wall of the downcomer to the center vertical axis line of the downcomer. Liquid injection apertures are arranged along the circular pipe conduit and are non-uniformly spaced apart from the center vertical axis of the downcomer to the wall of the downcomer. The apertures further alternate and are offset between the top and bottom surfaces of the circular pipe conduit. The process of the disclosure involves using the system described above for carrying out a fermentation process for converting a C1-substrate to at least one product such as ethanol.

Abstract: There is provided a welding helmet (1) comprising a face protection member (3) moveable between a lowered position in which the face protection member (3) covers a wearer's face, and an upraised position, in which the face protection member (3) uncovers the wearer's face, a headband suspension system (9) for fixing the face protection member (3) to a wearer's head, a protective cap (17) comprising a flexible outer layer (19) and at least one compressible inner liner (21).

Abstract: The disclosure provides a system and a process for injecting and uniformly distributing a liquid into a fermentation broth in a bioreactor for maintaining stable condition within the fermentation broth. The system includes a downcomer section which contains two or more circular pipe conduits extending from a wall of the downcomer to the center vertical axis line of the downcomer. Liquid injection apertures are arranged along the circular pipe conduit and are non-uniformly spaced apart from the center vertical axis of the downcomer to the wall of the downcomer. The apertures further alternate and are offset between the top and bottom surfaces of the circular pipe conduit. The process of the disclosure involves using the system described above for carrying out a fermentation process for converting a C1-substrate to at least one product such as ethanol.

Abstract: A fermentation unit and a method of carrying out fermentation are described. The fermentation unit can be transported from one facility to another to carry out a fermentation process. The fermentation unit and method allow for the fermentation of a C1-containing substrate from a source at a particular facility to produce products such as alcohols and acids. Examples of the source of the C1-containing substrate include without limitation steel manufacturing processes, coal and biomass gasification processes, coke manufacturing processes, etc. The fermentation unit can be housed within a container having a volume of less than about 6 m3.

Abstract: A method for cancelling the effects of variation of primary voltage supplied to a welding power supply includes receiving a mains voltage at the welding power supply, rectifying the mains voltage to obtain a rectified voltage, applying the rectified voltage to an input of a pulse wave modulated (PWM) controlled inverter, detecting a value of the rectified voltage, setting a maximum duty cycle for the PWM controlled inverter based on the value of the rectified voltage, and operating the PWM controlled inverter in accordance with the maximum duty cycle for the PWM controlled inverter. The maximum duty cycle may also be set according to a core size or area of a main transformer of the welding power supply.

Abstract: A welding helmet (1) has a protective shield (2) and a first swivel mechanism (10) that pivotally connects the protective shield with a head suspension system (6) for swiveling about a swivel axis. The first swivel mechanism enables the protective shield and the head suspension system to be swiveled between a lowered position, in which the protective shield covers a wearer's face, and an upraised position, in which the protective shield uncovers the wearer's face. The first swivel mechanism (10) has a recess (16a) and a retainer (17a) for engaging with the recess. The retainer and the recess are arranged to engage with each other in the upraised position, and to remain disengaged in the lowered position and between the lowered position and the upraised position.

Abstract: There is provided a welding helmet (1) comprising a face protection member (3) moveable between a lowered position in which the face protection member (3) covers a wearer's face, and an upraised position, in which the face protection member (3) uncovers the wearer's face, a headband suspension system (9) for fixing the face protection member (3) to a wearer's head, a protective cap (17) comprising a flexible outer layer (19) and at least one compressible inner liner (21).

Abstract: A fermentation unit and a method of carrying out fermentation are described. The fermentation unit can be transported from one facility to another to carry out a fermentation process. The fermentation unit and method allow for the fermentation of a C1-containing substrate from a source at a particular facility to produce products such as alcohols and acids. Examples of the source of the C1-containing substrate include without limitation steel manufacturing processes, coal and biomass gasification processes, coke manufacturing processes, etc. The fermentation unit can be housed within a container having a volume of less than about 6 m3.

Abstract: Apparatuses and associated methods are described for the efficient evaluation of C1-containing substrates, and especially for such evaluation conducted locally, or on-site, at a prospective facility for implementation of a biological conversion process for desired end product using a C1 carbon source. The exact composition of a given, industrial C1-containing substrate, as well as the range in composition fluctuations, are generally difficult to reproduce at a remote facility (e.g., a laboratory or a pilot-scale or demonstration-scale process), as required for the accurate prediction/modeling of commercial performance to justify large capital expenditures for commercial scale-up.

Abstract: There is provided a welding helmet having a protective shield and a welding visor. The welding visor is detachably attachable to the protective shield by means of a bayonet coupling. The bayonet coupling has a first bayonet part and a second bayonet part. The first bayonet part is rotatably connected to the welding visor for a rotation between a release position, in which the bayonet coupling is disengaged, and an engage position, in which a disengagement of the bayonet coupling is disabled. The bayonet coupling further forms a pivot for pivoting the welding visor relative to the protective shield between a welding position, in which the welding visor covers the see-through window, and a non-welding position, in which the welding visor uncovers the see-through window. A locking member is provided that is switchable between a locked position and an unlocked position.

Abstract: A welding helmet (1) has a protective shield (2) and a first swivel mechanism (10) that pivotally connects the protective shield with a head suspension system (6) for swiveling about a swivel axis. The first swivel mechanism enables the protective shield and the head suspension system to be swiveled between a lowered position, in which the protective shield covers a wearer's face, and an upraised position, in which the protective shield uncovers the wearer's face. The first swivel mechanism (10) has a recess (16a) and a retainer (17a) for engaging with the recess. The retainer and the recess are arranged to engage with each other in the upraised position, and to remain disengaged in the lowered position and between the lowered position and the upraised position.

Abstract: The invention provides a novel bacterium with improved properties, including improved ethanol production, ethanol productivity, CO uptake, specific growth rate, ethanol to acetate ratio, and alcohol tolerance. The bacterium may be derived from Clostridium autoethanogenum and/or may comprise at least one DNA or amino acid sequence selected from SEQ ID NOs: 1, 3, 6, 8, 10, 12, 14, and 16. In one embodiment, the bacterium is Clostridium autoethanogenum deposited under DSMZ accession number DSM23693 or a bacterium derived therefrom.

Abstract: Apparatuses and associated methods are described for the efficient evaluation of C1-containing substrates, and especially for such evaluation conducted locally, or on-site, at a prospective facility for implementation of a biological conversion process for desired end product using a C1 carbon source. The exact composition of a given, industrial C1-containing substrate, as well as the range in composition fluctuations, are generally difficult to reproduce at a remote facility (e.g., a laboratory or a pilot-scale or demonstration-scale process), as required for the accurate prediction/modeling of commercial performance to justify large capital expenditures for commercial scale-up.

Abstract: Apparatuses and associated methods are described for the efficient evaluation of C1-containing substrates, and especially for such evaluation conducted locally, or on-site, at a prospective facility for implementation of a biological conversion process for desired end product using a C1 carbon source. The exact composition of a given, industrial C1-containing substrate, as well as the range in composition fluctuations, are generally difficult to reproduce at a remote facility (e.g., a laboratory or a pilot-scale or demonstration-scale process), as required for the accurate prediction/modeling of commercial performance to justify large capital expenditures for commercial scale-up.

Abstract: An elongated guide that is removably attachable to a hardhat and a visor that is removably mountable to the elongated guide.

Abstract: An appliance mounting device 10 that is adapted for securement to head gear 12. The device 10 has an elongated guide 14 that is adapted for removable attachment to the head gear 12 such that a lengthwise dimension of the elongated guide 14 is at least generally coincident with a sagittal plane 16. An appliance holder 20 supports an appliance 18 and can engage the elongated guide 14 to allow for adjustment of the position of the appliance 18 along the elongated guide 14.

Abstract: A welding helmet 10 that has a face shield 12 that has a native width NW and that has a lens 14 disposed in the face shield 12. A spreader bar 30 can expand the face shield 12 from its native width NW to an increased width IW to allow the welding shield 10 to easily accommodate earmuffs 16 worn by the welder.

Abstract: An appliance mounting device 10 that is adapted for securement to head gear 12. The device 10 has an elongated guide 14 that is adapted for removable attachment to the head gear 12 such that a lengthwise dimension of the elongated guide 14 is at least generally coincident with a sagittal plane 16. An appliance holder 20 supports an appliance 18 and can engage the elongated guide 14 to allow for adjustment of the position of the appliance 18 along the elongated guide 14.

Abstract: Apparatuses and associated methods are described for the efficient evaluation of Cl-containing substrates, and especially for such evaluation conducted locally, or on-site, at a prospective facility for implementation of a biological conversion process for desired end product using a Cl carbon source. The exact composition of a given, industrial Cl-containing substrate, as well as the range in composition fluctuations, are generally difficult to reproduce at a remote facility (e.g., a laboratory or a pilot-scale or demonstration-scale process), as required for the accurate prediction/modeling of com?mercial performance to justify large capital expenditures for commercial scale-up.

Abstract: The invention provides a novel bacterium with improved properties, including improved ethanol production, ethanol productivity, CO uptake, specific growth rate, ethanol to acetate ratio, and alcohol tolerance. The bacterium may be derived from Clostridium autoethanogenum and/or may comprise at least one DNA or amino acid sequence selected from SEQ ID NOs: 1, 3, 6, 8, 10, 12, 14, and 16. In one embodiment, the bacterium is Clostridium autoethanogenum deposited under DSMZ accession number DSM23693 or a bacterium derived therefrom.