A tank assembly for a gravity-flow graywater filtration system includes a lower portion having a lower-portion sidewall with a port and an upper portion having an extension tank that includes a bottom, an extension-tank sidewall, a removable lid, and an inflow-pipe portion coupled to a first port in the extension-tank sidewall and including a part that extends through a port in the bottom of the extension tank. The tank assembly also includes a filter cartridge housed within the upper portion at a location beneath the extension tank, and a sump pump in the lower portion, the sump pump having an outflow-pipe portion coupled to the port in the lower-portion sidewall.

An apparatus for collection and disposal of fats, oil and grease that includes a fabric container having at least one open end, a biogradable material capable of absorbing a large quantity of fats, oil and grease positioned in the container through the open end, the container and biogradable material adapted for being placed in a source of fats, oil and/or grease for absorbing the fats, oil and/or grease for removal from the source and for transport to a location for processing.

An object of the present invention is to provide a honeycomb filter capable of achieving a combination of high collection efficiency and low pressure loss. The honeycomb filter comprises a ceramic honeycomb substrate in which a multitude of cells through which a fluid flows are disposed in parallel in a longitudinal direction and are separated by cell walls, each cell being sealed at an end section at either the fluid inlet side or the fluid outlet side, and a filter layer which, among the surfaces of the cell walls, is formed on the surface of the cell walls of those cells in which the end section at the fluid inlet side is open and the end section at the fluid outlet side is sealed by a sealing material, wherein the thickness of the filter layer increases gradually from the fluid inlet side toward the fluid outlet side.

A filter medium layer includes filter media configured to capture suspended solids contained in a liquid to be treated and filtering aids configured to allow the suspended solids contained in the liquid to be treated to pass through the filtering aids. The filter media and the filtering aids are mixed together and the liquid to be treated is filtered by being passed through the filter media and the filtering aids as mixed together. A filter device includes the filter medium layer and a filter tank configured to accommodate the filter medium layer.

An object of the present invention is to provide a honeycomb filter having low pressure loss and high collection efficiency. The honeycomb filter of the present invention comprises a ceramic honeycomb substrate in which a multitude of cells through which a fluid flows are disposed in parallel in a longitudinal direction and are separated by cell walls, each cell being sealed at an end section at either the fluid inlet side or the fluid outlet side, and a filter layer which, among the surfaces of the cell walls, is formed on the surface of the cell walls of those cells in which the end section at the fluid inlet side is open and the end section at the fluid outlet side is sealed by a sealing material, wherein the filter layer comprises spherical ceramic particles, and the average particle size of the spherical ceramic particles increases gradually from the fluid inlet side toward the fluid outlet side.

A honeycomb ceramic substrate, a method of making thereof, and a honeycomb extrusion die configured to extrude a honeycomb ceramic substrate from a batch of ceramic or ceramic-forming material is provided. The substrate may include a lattice of intersecting walls defining a honeycomb network of flow channels extending between an inlet end and an outlet end of the honeycomb substrate. Each flow channel may be defined by a plurality of channel walls of the intersecting walls with at least two of the plurality of channel walls including concave inner surfaces facing a center of the corresponding flow channel from central portions of the concave inner surfaces to concave corner portions facing the center of the corresponding flow channel.

Methods for extracting one or more chemical compounds from cannabis plant material are provided. In some embodiments, the method may comprise: providing the cannabis plant material; extracting the cannabis plant material with a solvent to produce a solvent extract; and filtering the solvent extract through a filter material to produce a filtered extract. Also provided are related systems. Related cannabis extracts and products comprising cannabis extracts are also provided.

Methods for extracting one or more chemical compounds from cannabis plant material are provided. In some embodiments, the method may comprise: providing the cannabis plant material; extracting the cannabis plant material with a solvent to produce a solvent extract; and filtering the solvent extract through a filter material to produce a filtered extract. Also provided are related systems. Related cannabis extracts and products comprising cannabis extracts are also provided.

Air filtration apparatuses, systems and methods for nitrous oxide and volatile organic compound (VOC) removal and non-VOC particle removal enable the removal of particulates, nitrous oxide-containing compounds, and volatile organic compounds from large volume enclosed environments. Systems incorporate HEPA filtration upstream from UV LED-assisted photo reaction chamber comprising a plurality of baffles having air flow-through airflow spaces are spaced apart along a duct, with a porous and permeable nitrous oxide-adsorbing filter oriented downstream from the UV-assisted photo reaction chamber further filtering the airflow in the system to remove nitrous oxide-containing compounds.

A high-efficient particulate air filter assembly including a high efficient particulate air filter for filtering the intake air as it enters an air purifying system is provided. The air filter assembly can further include a housing configured for use in an air purification system; a first prefilter positioned in the housing upstream from the particulate air filter; and an electrostatically charged substrate positioned in the housing downstream from the particulate air filter. The air filter assembly can further include a second prefilter having a paper layer; a carbon layer; a zeolite layer; a mesh layer; and a foam layer.