A holding tank for a sanitary installation carrying a sanitary fixture receives fecal matter or wastewater from the sanitary fixture of the sanitary installation and has at least one inlet and at least one outlet. At least one suction float in the holding tank floats on the liquid therein and forms with at least one suction chamber opening downward through a suction screen into the tank. An extraction line connected to at least one suction pump opens into the liquid in the suction chamber for withdrawing the liquid from the holding tank through the suction float and for recycling the extracted water for use as a flushing fluid for the sanitary fixture of the sanitary installation.

A grey water heat recovery apparatus has first and second passes in counter-flow orientation. The hot side is grey water. The cold side is fresh water. It extracts heat from the grey water. The fresh water is carried in tubing bundles in series immersed in grey water sumps in cylindrical plastic, mild steel, or stainless steel pipe. Both ends of the fresh water bundle assembly extend from the same upper end pipe closure, without a pressurized line wall penetration in the walls of the pipe. There is a non-electrically conductive barrier between the fresh water and grey water flow paths. The apparatus has a leak detection circuit and co-operable bypass valves. The tube bundle is wider at the top than at the bottom. The lower manifold has grey water passages between the centering ears. The entire assembly is enclosed in a unitary external housing with easily accessible connection fittings.

The present invention describes a hybrid device (1) for a recirculation shower, allowing purification and either recycling of water or discarding of water, wherein said hybrid device (1) comprises a recirculation loop (2), a filter system (4) with a nano-filter (5) such as for instance an electropositive nano-ceramic filter, e.g. a nano alumina (fiber) filter, at least one filter quality sensor (3), at least one pre-filter (6), and wherein the hybrid device (1) is arranged to redirect the water from recirculation to drainage when the at least one filter quality sensor (3) indicates the need thereof.

A water conservation system for use in a building comprises a water supply pipe, water-consuming equipment, a water-consuming equipment outlet pipe, an intermediate water inlet pipe, an intermediate water collection pipe, an intermediate water outlet pipe, an intermediate water outlet valve, an intermediate water overflow pipe, and a sewage pipe. The intermediate water collection pipe is installed in the building, and a water inlet and outlet of the intermediate water collection pipe is pre-arranged at every floor. The intermediate water outlet pipe and the intermediate water inlet pipe communicates with the water inlets and outlets of the intermediate water collection pipe, respectively. The intermediate water outlet pipe communicates with a toilet water tank. A first check valve is disposed on the intermediate water inlet pipe.

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 grey water heat recovery apparatus has first and second passes arranged in counter-flow orientation. The heat recovery apparatus is made from commonly available materials. It has a hot side for grey water, and a cold side for fresh water under pressure. The heat recovery apparatus extracts heat from grey water to pre-heat water for a water heater. The fresh water is carried in passes in series, each pass being immersed in a grey water sump in a plastic pipe. The water level in the sump is high enough to immerse the dominant portion of the fresh water pass in grey water. Both ends of the fresh water coil are carried out through the same upper end pipe closure, without a penetration in the pipe wall. The entire assembly may be enclosed in a unitary external housing with easily accessible connection fittings.

An apparatus for the treatment and transformation of municipal wastewater sludge or any other organic putrescible matter into biogas and liquid fertilizer by methanation. Several consecutive floating cylindrical bioreactors almost totally immersed in water, are bathing longitudinally in a thermally insulated basin to maintain set temperatures, mixing their contents by revolving on themselves by the action of air ejected from a conduit underneath them, engaging all elements in a collective momentum, from a multiplied force, because of the constant free power of each air bubble lodged in exterior buckets and grouped as a lifting force. The gas produced by methanation of the organic waste furnishes a source of heat and its pressure is used for the functioning of the whole apparatus, including several types of pumps, valves, and a new model of steam engine. A network of hoses is provided to bring the fertilizer to the farmlands.

A greywater recovery and reuse system is shown, including a body for collecting, conditioning 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 conditioned 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.

Systems for water collection and recycling are described herein. A downspout having a downspout groove is vertically disposed on an exterior wall. Electrical wiring that is operatively connected to at least one electrical power generator is disposed along the downspout groove. The downspout and electrical power generator are supported by downspout brackets. The downspout is fluidly connected to a gutter and an outdoor water storage tank for collecting rain water. A water pump moves grey water from a shower tub drainage pipeline to a water path switch valve. A control switch directs the water path switch valve to divert the grey water to a toilet storage tank, an outdoor water storage tank, or a washing machine water tank.