Systems and methods are disclosed that include providing a filter assembly having a filter housing and a filter medium disposed within and/or carried by the filter housing. The filter medium is configured to be exposed to an external environment and collect, filter, or otherwise remove aerosols (which may be contaminated with bacteria, viruses, or a combination thereof) from the external environment when coupled to an evacuation component, such as a dental high vacuum evacuation (HVE) line.

A funnel is provided, including: a main body, being a transparent plastic member which is integrally formed of one piece by injection, including an enlarged section, an intermediate section and a joint section which are connected in sequence in an axial direction, the intermediate section being in communication with and between the enlarged section and the joint section, the main body being provided with an exhaust conduit, the exhaust conduit being in communication with an interior of the joint section and in communication with an outside of the funnel.

A funnel is provided, including: a main body, being a transparent plastic member which is integrally formed of one piece by injection, including an enlarged section, an intermediate section and a joint section which are connected in sequence in an axial direction, the intermediate section being in communication with and between the enlarged section and the joint section, the main body being provided with an exhaust conduit, the exhaust conduit being in communication with an interior of the joint section and in communication with an outside of the funnel.

A liquid purification system is disclosed, comprising a reservoir to store a liquid and a purifier including a plurality of LED's configured to emit ultraviolet light into the reservoir and the liquid therein. A solar cell is positioned on a top of the purifier to provide power to the plurality of LED's. The solar cell may also provide power to an electronic device via a cable extending from the purifier.

A liquid purification system is disclosed, comprising a reservoir to store a liquid and a purifier including a plurality of LED's configured to emit ultraviolet light into the reservoir and the liquid therein. A solar cell is positioned on a top of the purifier to provide power to the plurality of LED's. The solar cell may also provide power to an electronic device via a cable extending from the purifier.

An apparatus for production of French press style coffee via a process to immerse and steep coffee grounds in heated water in a non-oil-absorbing environment. Filtering a finished beverage from the steeped mixture through a microperforated non-oil-absorbing filter, where microperforations are sized to achieve sediments levels equivalent to or less than that of traditional French press, and filtration rate is enhanced via any combination of vibratory energy, air pressure, and air flow to the brewed mixture. The microperforated filter may be permanent and reusable, or may be disposable. The disposable filter is preferably made from flexible aluminum foil and recyclable. The apparatus and method support modification of filter size, microperforation size, perforation density, air pressure, air flow and vibratory action to vary beverage filtration rate and finished beverage composition.

An apparatus for production of French press style coffee via a process to immerse and steep coffee grounds in heated water in a non-oil-absorbing environment. Filtering a finished beverage from the steeped mixture through a microperforated non-oil-absorbing filter, where microperforations are sized to achieve sediments levels equivalent to or less than that of traditional French press, and filtration rate is enhanced via any combination of vibratory energy, air pressure, and air flow to the brewed mixture. The microperforated filter may be permanent and reusable, or may be disposable. The disposable filter is preferably made from flexible aluminum foil and recyclable. The apparatus and method support modification of filter size, microperforation size, perforation density, air pressure, air flow and vibratory action to vary beverage filtration rate and finished beverage composition.

A drain is positioned in an aperture in a floor surface. The drain includes a flange that defines an opening, extends overt the floor surface and engages the floor surface. A first conduit is connected to the flange and extends through the aperture in the floor surface. The first conduit defines a first length extending downward from the flange and also defines a first perimeter. A second conduit is connected to the flange and extends through the aperture in the floor surface. The second conduit defines a second length extending downward from the flange, and defines a second perimeter. The second perimeter is greater than the first perimeter, the second conduit surrounds the first conduit, the second conduit is outwardly spaced from the first conduit, and the first conduit and the second conduit are coaxial.

The disclosure provides an integrated separation unit for microplastics in the coastal sediments and a collection method of microplastics, belonging to the technical field of water treatment. The unit includes: a holder, a separation cylinder, a collection bottle, a central baffle plate, a baffle plate control knob, a stirring propeller, a motor, a cylinder switch, a filtration screen, a welding nozzle, a filter membrane and a vacuum pump. Using this unit for microplastic collection has the advantages of easy operation, economical and environment-friendly, high separation efficiency, and high durability.

The disclosure provides an integrated separation unit for microplastics in the coastal sediments and a collection method of microplastics, belonging to the technical field of water treatment. The unit includes: a holder, a separation cylinder, a collection bottle, a central baffle plate, a baffle plate control knob, a stirring propeller, a motor, a cylinder switch, a filtration screen, a welding nozzle, a filter membrane and a vacuum pump. Using this unit for microplastic collection has the advantages of easy operation, economical and environment-friendly, high separation efficiency, and high durability.