Abstract: A system for processing biogas, the system comprising: a container, a pressure swing adsorption (PSA) unit housed in the container, the PSA unit having: a plurality of beds containing adsorbent material, the adsorbent material configured to selectively adsorb gas species from the biogas to process the biogas, a rotary valve module for distributing flow of 5 the biogas within the PSA unit, an inlet for supplying the biogas to the plurality of beds from outside of the container, and an outlet for transporting the processed biogas away from the PSA unit.

Abstract: A system for recovering methane from a biogas comprises a pressure swing adsorption (PSA) unit, a biogas inlet, a gas mixer and a surge tank. The PSA unit recovers methane from the biogas and directs one fraction of the recovered methane toward a product gas outlet. The PSA unit directs another fraction of the recovered methane toward a recycling line and directs remaining gases to an exhaust. The biogas inlet receives biogas from a biogas source. The gas mixer is fluidly connected to the biogas inlet, to the recycling line and to the PSA unit, forms a combination of the biogas received at the biogas inlet and of the recycled methane, and supplies the combination to the PSA unit for methane recovery. The surge tank is in one of the recycling line or in an exhaust line and reduces a pressure in the PSA unit to improve methane recovery efficiency.

Abstract: A system for recovering methane from a biogas comprises a pressure swing adsorption (PSA) unit, a biogas inlet, a gas mixer and a surge tank. The PSA unit recovers methane from the biogas and directs one fraction of the recovered methane toward a product gas outlet. The PSA unit directs another fraction of the recovered methane toward a recycling line and directs remaining gases to an exhaust. The biogas inlet receives biogas from a biogas source. The gas mixer is fluidly connected to the biogas inlet, to the recycling line and to the PSA unit, forms a combination of the biogas received at the biogas inlet and of the recycled methane, and supplies the combination to the PSA unit for methane recovery. The surge tank is in one of the recycling line or in an exhaust line and reduces a pressure in the PSA unit to improve methane recovery efficiency.

Abstract: A system for processing biogas, the system comprising: a container, a pressure swing adsorption (PSA) unit housed in the container, the PSA unit having: a plurality of beds containing adsorbent material, the adsorbent material configured to selectively adsorb gas species from the biogas to process the biogas, a rotary valve module for distributing flow of 5 the biogas within the PSA unit, an inlet for supplying the biogas to the plurality of beds from outside of the container, and an outlet for transporting the processed biogas away from the PSA unit.

Abstract: A tool for retrieving magnetic objects. The tool comprising a flexible rod; a handle, connected to a first end of the flexible rod; and a magnetic head, connected to a second end of the flexible rod. Further, the magnetic head comprises a through-hole for retrieving the magnetic objects.

Abstract: A tool for retrieving magnetic objects. The tool comprising a flexible rod; a handle, connected to a first end of the flexible rod; and a magnetic head, connected to a second end of the flexible rod. Further, the magnetic head comprises a through-hole for retrieving the magnetic objects.

Abstract: An offset outlet flush valve has a valve body, the valve body having an inlet comprising an inlet aperture, an overflow tube socket comprising an overflow tube aperture, and an outlet comprising an outlet aperture. The outlet aperture of the valve body, and the wall that defines it, intersects a portion of the inlet aperture and a portion of the overflow tube aperture and the walls that define them. In this way, a water flow continuum is created between the inlet aperture and the outlet aperture and between the overflow tube aperture and the outlet aperture. A number of alternative embodiments of an overflow tube socket and overflow tube are also provided depending upon OEM or after-market application of the offset outlet flush valve.

Abstract: A method of determining speed of rotation of a motor is provided. The method involves collecting samples with a measuring sensor at a sampling frequency, set on the basis of mechanical vibration of the motor, for the duration of a measurement period and storing the samples in the memory of a data carrier as measurement data of a fixed format. The speed of rotation of the motor is determined from the measurement data by determining the cycle length of a periodic vibration signal in the time domain by a maximum likelihood estimate calculated by maximizing a maximum likelihood function adjusted to the measurement data, the speed of rotation being obtained from the frequency point where the maximum likelihood function obtains its maximum value.

Abstract: The present invention provides an improved top mounted toilet flush valve and a method for installing the flush valve that can be readily adapted to the tank profile of a wide variety of gravity operated flush toilets. More specifically, in accordance with the objectives of the present invention, there is provided a flush valve having an overflow tube that is adjustable in height and a method for adjusting the overflow tube.