Abstract: An ultraviolet (UV) room-sterilization device includes an upper portion with germicidal lamps and movable shield walls mounted by multi-hinged arms. The walls move from a closed position to selected open positions to form a shadow area that protects occupants or equipment while permitting disinfection elsewhere. Hinge-position sensors and/or UV detectors generate a live emission map used to classify motion detected by onboard sensors: movement within the shadow is permitted, movement toward its boundary triggers a warning, and movement in exposed regions causes immediate lamp shutoff. A timer provides delayed start and cycle limits with code-based authorization. Embodiments include circumferential or sector lamps, retractable walls slotted into the housing, and floor, tabletop, or handheld form factors, enabling safe, targeted disinfection in occupied spaces.

Abstract: A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3g/L or lower comprising subjecting at least a part of said manure to a first biological passive flotation step in a flotation unit having a hydraulic residency time (HRT) of about 4 to about 24 hours with a polymer to yield a first flotation solid fraction and a first flotation liquid fraction, said method comprising a further treatment.

Abstract: A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3 g/L or lower comprising subjecting at least a part of said manure to a first biological passive flotation step in a flotation unit having a hydraulic residency time (HRT) of about 4 to about 24 hours with a polymer to yield a first flotation solid fraction and a first flotation liquid fraction, said method comprising a further treatment.

Abstract: A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3 g/L or lower comprising subjecting at least a part of said manure to a first biological passive flotation step in a flotation unit having a hydraulic residency time (HRT) of about 4 to about 24 hours with a polymer to yield a first flotation solid fraction and a first flotation liquid fraction, said method comprising a further treatment.