A saturated layer stormwater filtering system with down-flow layered multimedia filters is disclosed. The filtering system may include an upflow pretreatment chamber and a subsequent filtration chamber. It also includes a snorkel pipe as an adjustable head control or internal baffles. The system incorporates gravity powered partially saturated stormwater media filters to harness the potential energy of stormwater from downspouts and pumped flows from stormwater catchments to drive the polluted stormwater in a hydraulically controlled fashion by gravity through a series of filter media layers.

A novel fibrous membrane comprises at least one substrate layer comprising at least 80% by weight of microfibers that carry positively charged and/or negatively charged functional groups, and at least one layer of filtration material attached to the substrate layer, wherein the layer of filtration material comprises at least 80% by weight of nanofibers that carry negatively charged and/or positively charged functional groups. The fibrous membrane is able to remove or reduce the concentration of bacteria, viruses and heavy metals while maintaining relatively high water flow. A filter comprising the fibrous membrane and a method for manufacturing the fibrous membrane are also provided.

A cell capture, disruption, and extraction method includes a introducing a plurality of abrasives in a disruption chamber, which can include diamond powder, variably and multi dimensionally disbursed therein, and a pestle positioned in the disruption chamber. The method includes agitating the abrasives by moving the disruption chamber and/or pestle, agitation of the abrasives tearing cell structure in the solution to access its contents. A binding column or size exclusion column can be positioned downstream of the disruption chamber. Cell solution can first be introduced in the disruption chamber, the abrasives capturing the cells and allowing therethrough and purging the waste content, then breaking the cell content. The lysate can then bind to an extraction matrix downstream of the disruption chamber or it can be mixed in with the abrasives.

A filtration apparatus includes a filtration tank; a layer of filtration media that filters supplied raw water by passing the raw water therethrough within the interior of the filtration tank; and a screw cleansing mechanism having a cylindrical outer cylinder which is provided within the filtration tank in a vertical orientation, a spiral shaped screw which is provided such that the long axis thereof extends in the longitudinal direction of the outer cylinder, and a screw driving member for rotating the screw, that scrubs and cleans filtration media by rotating the screw. The screw is in the shape of a coil spring.

Systems and methods for generating and using a water filtration media containing date seed powder are provided. The method of generating the date seed powder for use in a water treatment system includes drying the date seeds, cleaning and removing the date seed envelopes, grinding the date seeds, and segregating the date seed powder according to a predetermined particle size. The method of using the date seed powder to treat water includes using a treatment tank with a date seed media bed layer, introducing water, and filtering suspended solids from the water stream using the date seed media bed layer. The system utilizing the date seed media bed layer includes a treatment tank, a date seed media bed layer, water inlets and outlets, backwashing equipment, and media support screens.

A photovoltaic evaporation and distillation system for the recycling of wastewater to potable water is disclosed herein. The system is comprised of six components that work in conjunction to produce both a source of reusable water for indoor appliances that produce greywater (or irrigation use), and potable water.

Systems, devices, and techniques described herein relate to iron-based desalination of water. In some cases, an inflow of water including chlorine and sodium can be received. A plurality of iron nanoparticles may capture the chlorine and the sodium. The iron nanoparticles may at least partially include Zero Valent Iron (ZVI). An outflow of the water may be emitted. The chlorine and the sodium may be omitted from the outflow.

Systems, methods, and filter media for filtering molten aluminum or aluminum alloy are provided. The filter media includes a plurality of porous reticulated filter media pieces composed of at least one type of bonded particle. Each of the plurality of filter media pieces have a porosity between 5 pores per inch (PP) and 90 pores per inch and are between ¾ inches and 6 inches across and between ½ inches and 2 inches thick. The filter media pieces provide a plurality of external tortuous paths between the filter media pieces and a plurality of internal tortuous paths within individual ones of the filter media pieces for the molten aluminum or aluminum alloy to flow through when the filter media pieces are arranged in a filtration vessel. The filter media may be used in an inline deep bed aluminum filtration process to replace existing media.

Systems and methods for generating and using a water filtration media containing date seed powder are provided. The method of generating the date seed powder for use in a water treatment system includes drying the date seeds, cleaning and removing the date seed envelopes, grinding the date seeds, and segregating the date seed powder according to a predetermined particle size. The method of using the date seed powder to treat water includes using a treatment tank with a date seed media bed layer, introducing water, and filtering suspended solids from the water stream using the date seed media bed layer. The system utilizing the date seed media bed layer includes a treatment tank, a date seed media bed layer, water inlets and outlets, backwashing equipment, and media support screens.

The instant invention, in one aspect, provides a process for decontaminating water to remove contaminants, said process comprising passing contaminated water through a filter comprising a plurality of filtering elements capable of lowering the contaminants by at least 70%. In another aspect is provides a filtering unit comprising a plurality of filtering elements arranged in individual layers, said individual layers independently selected from brick chips, hemp fibers, mixture of hemp fibers and charcoal, agave, jute fibers, sand, filter paper, and gravel.