An indirect evaporative cooling system for cooling a space adjacent to or containing an ablution bay is described. The indirect evaporative cooling system includes a greywater source from the ablution bay and evaporative cooler apparatus located above the space to be cooled in a dome shaped housing. The evaporative cooler apparatus includes a wet channel, at least one spray nozzle, and a dry channel. The at least one spray nozzle is located at the top of the evaporative cooler apparatus and is fluidly connected to the greywater source and the wet channel. The wet channel is located directly above the dry channel. A first side of the dry channel is connected to a first opening with a fan and outside air.

A microplastic filter (also referred herein as fluid filter) for a washing machine has a filter housing, a first filter screen, a second filter screen, an inlet opening 16, and an outlet opening. The inlet and outlet openings communicate with each other through the first filter screen to define a direction of fluid flow. The first filter chamber has a retentate outlet, is particularly easy to handle if the second filter screen is arranged in a cavity of the filter housing, the inlet and outlet openings communicate with each other through the second filter screen, and the retentate outlet is arranged on a side of the second filter screen that faces the fluid flow.

Biosolids conversion systems and methods are provided. Wastewater may be received and separated into a separated water component and a dewatered solids component on-site at or near a wastewater source. The separated water components may be treated on-site using an ancillary water treatment process. The dewatered solids may be converted to a biosolid with aid of one or more oxidizers and a blending chamber. The dewatered solids may be converted to a biosolid on-site at or near a wastewater source or may be converted to a biosolid off-site at a central solids processing facility.

The present disclosure provides methods and systems for processing or treating wastewater. The methods of systems of the present disclosure may perform a treatment process on a wastewater stream including gray water and black water to produce a product stream. The product stream may comprise a potable water stream or a stream of treated water with a reduced concentration of one or more contaminant originally included in the wastewater stream.

A system for treating emissions from a vehicle includes an ozone generator, a first holding tank, and an exhaust vent. The first holding tank is downstream from the ozone generator and defines a volume for liquid waste beneath a void space. The exhaust vent is downstream from the first holding tank and outside of the vehicle. A supply conduit connects the ozone generator to the void space of the first holding tank. An exhaust conduit connects the void space of the first holding tank to the exhaust vent. The ozone generator, supply conduit, void space of the first holding tank, exhaust conduit, and exhaust vent establish a thermal driving head from the ozone generator through the void space of the first holding tank to the exhaust vent.

A wastewater treatment device for decomposing solid matter using aerobic microorganisms in a bacteria bed, includes a decomposition tank that accommodates the solid matter obtained by crushing food waste and the bacteria bed, a water supply capable of supplying water to the decomposition tank, and a stirrer for stirring the solid matter and the bacteria bed in the decomposition tank. The bacteria bed includes a carrier made of a synthetic resin having a plurality of pores and microorganisms carried in the plurality of the pores.

A greywater recovery and reuse system is shown, including a body for collecting, reconditioning and discharging greywater. The body has an inlet connection to a source of greywater; a filter for filtering the greywater; a tank for receiving the filtered greywater; a disinfector for disinfecting the filtered greywater; a pump for discharging the reconditioned greywater from said tank to a toilet that needs flushing water; a discharge connection to a sanitary sewer system; a fresh water connection and a control system for controlling the operation of the greywater recovery and reuse system. The system includes a controller for operating the system and dealing with certain alarm and status conditions. Methods of operating the system are also comprehended.

This specification describes systems for the treatment and reuse of grey water and related processes. An exemplary system collects grey water from baths and showers and treats it for use in toilet flushing. Influent bathing water passes through a prefilter to remove larger particles and flows into a grey water collection tank. Collected grey water is filtered through a membrane designed to remove suspended solids. Membrane permeate passes through a sorbent media to remove soluble organics and then flows into a permeate tank. A chemical agent is used to disinfect water in one or more parts of the system and optionally to clean the membranes. A control system manages the operation of system. The system operates in a generally daily cycle with permeation dispersed over a material time, for example 4 or 8 hours or more.

This specification describes an intake filter for use, for example, in a system that collects greywater from baths or showers for re-use in toilet flushing. The intake filter provides essentially dead-end filtration. An influent by-pass may be provided, but the filter is cleaned as required to reduce use of the by-pass. Cleaning is performed when permeability of the filter declines. An upstream sensor may be used to detect the permeability of the filter. In one cleaning method, flowing water, optionally with air, is used to backwash the filter. The impulse of the flowing water also moves one or more valves to direct backwash water to a sanitary drain. For example, pumped effluent may impinge against a first flap to close an effluent drain, the first flap being mechanically linked to open a flap covering the sanitary drain.

A water conservation and recycling system where an integrated automated system comprising a sensor housing with at least one sensor, a diverting valve and controller, the system used to separate water based on quality parameters (for example, temperature, acidity (pH), dissolved oxygen, electrical conductance and/or turbidity). In one example, physical bio-filtration is used to remove debris particles from clean water and ultraviolet light and ionization is used for bacterial eradication of clean water. Separated clean water is stored and recycled for agriculture and toilet purposes resulting in up to 40% reduction in residential and commercial water consumption. Municipal water supply line pressure is used to pressurize storage tanks to provide intermittent irrigation water supply.