Abstract: A biofilm composition includes a biofilm encapsulated within an encapsulant. In one or more embodiments, the biofilm includes a support material and a community of microorganisms. In one or more of these embodiments, the material supporting the biofilm includes biochar or powdered activated carbon. The composition may be used to treat wastewater.

Abstract: An in situ remediation process for a PFAS-contaminated site includes sub-surface injection of slurry containing activated carbon in combination with a substances that promotes formation of an activated carbon emulsion and retention of PFAS by a solid matrix at said site, thereby removing said PFAS from groundwater.

Abstract: Methods and systems are provided for preventing vehicle roll. In one embodiment, a method includes: determining a first switch state; determining a second switch state; evaluating the first switch state and the second switch state to determine whether a condition of a mechanical linkage between a range selection device and a transmission has occurred; and selectively generating at least one of a control signal to control an electronic park brake and a notification message based on the determination.

Abstract: An example includes an apparatus, method, and system for producing and extracting a gas from a wastewater fluid. The apparatus can include a membrane including at least one hollow fiber, the at least one hollow fiber configured to convey a gas extracted from a wastewater fluid. Bacteria can be immobilized within the membrane, and the bacteria configured to produce the gas during treatment of the wastewater fluid.

Abstract: Methods and systems are provided for preventing vehicle roll. In one embodiment, a method includes: determining a first switch state; determining a second switch state; evaluating the first switch state and the second switch state to determine whether a condition of a mechanical linkage between a range selection device and a transmission has occurred; and selectively generating at least one of a control signal to control an electronic park brake and a notification message based on the determination.

Abstract: A mode selection system for switching between different operating modes of a transmission includes a rotary transmission selector for switching between a neutral mode, a forward drive mode, and a reverse drive mode. A park selector for selecting a park mode of the transmission is separate and remotely located from the rotary transmission selector. The rotary transmission selector is axially moveable along a central axis between a reference position and an axially depressed position. The rotary transmission selector is rotatable about the central axis. However, the rotary transmission selector is only rotatable about the central axis when depressed into the axially depressed position. The rotary transmission selector is mono-stable, and automatically returns to a reference position when released.

Abstract: A new accumulator for generating mixing bubbles comprises pivoting, counterbalanced buckets, the buckets receiving air directed from blowers, either directly from injectors connected to the blowers, or from diffusers used for aeration of the liquid in the tank. A bucket, weighed down by a counterbalance, receives air from injectors or diffusers below, and, as the air displaces liquid in the bucket, the buoyancy of the bucket increases until it exceeds the downward force of the counterweight, at which time the bucket pivots upward to release a large mixing bubble into the tank. An assembly for installation of the accumulator affixes the accumulator on a rigid vertical piece depending from a horizontal bridge.

Abstract: A new accumulator for generating mixing bubbles comprises pivoting, counterbalanced buckets, the buckets receiving air directed from blowers, either directly from injectors connected to the blowers, or from diffusers used for aeration of the liquid in the tank. A bucket, weighed down by a counterbalance, receives air from injectors or diffusers below, and, as the air displaces liquid in the bucket, the buoyancy of the bucket increases until it exceeds the downward force of the counterweight, at which time the bucket pivots upward to release a large mixing bubble into the tank. An assembly for installation of the accumulator affixes the accumulator on a rigid vertical piece depending from a horizontal bridge.

Abstract: A mixer for anaerobic decomposition of sludge in a digester, captures and compresses biogas emitted by the decomposing sludge. The compressed biogas proceeds through supply lines to gas accumulating apparatus mounted in the lower portion of the digester, close to or on the digester floor. Biogas accumulates in the gas accumulating apparatus to emerge as large mixing bubbles from 6 inches to 10 feet in diameter along their largest dimension. The mixing bubbles are large enough to generate a strong mixing current in the sludge that moves sludge as the bubbles rise to the surface. The mixing current mixes the sludge containing dissolved and suspended pollutants to promote the conversion of the pollutants by microorganisms contained in the sludge.

Abstract: A universal mechanical seal gland formed of plastic has a central aperture positionable over a shaft extending from a housing for positioning a stationary seal against a rotary seal on the shaft. The central aperture is formed of a plurality of cylindrical and radial surfaces which define sealing surfaces permitting the gland to be used with a variety of differently sized and shaped seal members and housings and differently sized shafts.

Abstract: A universal mechanical seal gland formed of plastic has a central aperture positionable over a shaft extending from a housing for positioning a stationary seal against a rotary seal on the shaft. The central aperture is formed of a plurality of cylindrical and radial surfaces which define sealing surfaces permitting the gland to be used with a variety of differently sized and shaped seal members and housings and differently sized shafts.