A method, an apparatus, and a system for treating a waste in a vehicle. The waste is received from a lavatory in a waste tank through a waste input port connected to the lavatory in the vehicle. Anaerobic bacteria are introduced into the waste such that anaerobic digestion occurs to breakdown a biodegradable material in the waste in the waste tank.

A method for treating a domestic supply water circuit, that comprises injecting a treatment product comprising silicates into the water flowing in said circuit in order to form a film on the inner surfaces of said circuit, characterised in that the injection of the treatment product comprises at least one step of injecting silicates at a concentration of between 100 and 200,000 milligrams per litre (mg/L) into the water flowing in said circuit for a period of between 10 minutes (min) and 24 hours (h), the flow rate of water flowing in the circuit being controlled within a range of between 0.05 and 100 litres per minute (L/min) and the temperature of water flowing in the circuit being controlled within a range of between 40 and 65 C.

A method of filtering fluid for injection into an injection well comprises detecting a fluid pressure in a conduit upstream of an actuator valve, verifying that the fluid pressure is within an operating pressure range, opening an actuator valve based on the verifying, receiving a fluid having suspended solids within a filter assembly in response to opening the actuator valve, actuating a pump in fluid communication with the filter assembly based on receiving the fluid within the filter assembly, and separating at least a portion of the suspended solids in the fluid within the filter assembly.

The present invention relates to a method for carrying out biological purification of wastewater with the aid of activated sludge in a sewage treatment plant, the sewage treatment plant comprising: an activated sludge tank that can be ventilated (B tank), at least two sedimentation and recirculation tanks (SU tanks), and a tank for biological phosphor elimination (P tank), wherein the P tank is hydraulically connected with the B tank via one or more openings, wherein the B tank is divided into two tanks B.sub.1 and B.sub.2 (B.sub.1 tank and B.sub.2 tank) which are hydraulically connectable via the P tank, wherein each of the B.sub.1 tank and the B.sub.2 tank is continuously connected hydraulically to at least one SU tank, wherein the P tank comprises closure means to cut off the hydraulic connection between the P tank and the B.sub.1 tank and/or the B.sub.2 tank, and wherein each of the SU tanks comprises an overflow unit for draining the excess water in the sewage treatment plant, wherein in the event of an emergency, the hydraulic connection between the P tank and either the B.sub.1 tank or the B.sub.2 tank is cut off, and the waste water is then accumulated and lifted up in the tanks that are not cut off, and the treated wastewater can effluent via the overflow unit of the respective SU tank(s). The present invention also relates to a sewage treatment plant for carrying out said method.

An electrolysis system for water cleaning employs close anode and cathode plate spacing while providing cleaning of the plates. In one embodiment a moving anode allows access to the plates for cleaning.

A method for mitigating microbe buildup within a potable water supply system including:

cleaning of the water supply system; acquiring data including at least water conditions at multiple points within the potable water supply system; a control system adjusting local water conditions within the potable water supply system; a bacteria monitor assessing water within the potable water system to determine at least levels of bacteria within the potable water system; and applying an antimicrobial condition to water within the potable water system.

The invention relates to a screening device in coarse solids chambers in a wastewater treatment plant, which has a coarse solids chamber (1) in which heavier solids will settle directly at the bottom, whereas lighter solids seek to escape through an opening (3) leading to a pumping chamber (2), having a first retention grating (4) positioned covering the opening (3) communicating both chambers (1, 2), on which a cleaning mechanism acts periodically; and a second grating (4) identical to the aforementioned one initially at rest in the upper part, above the water level, where by means of respective movement mechanisms both gratings (4) are interchanged from the resting position to the operating position opposite the opening (3). It also has a cleaning brush mechanism (5) for cleaning the gratings (4) when they are positioned in the upper portion at rest.

A method of air scouring an immersed membrane is described in this specification. The method comprising a step of adjusting one or more aeration parameters: between successive permeation, back pulse or relaxation cycles; during a permeation cycle; or, between a permeation cycle and a backpulse or relaxation cycle.

Disclosed herein is a free-standing cesspool and a cesspool liner that may be used to retrofit existing cesspools in order to provide additional storage and/or processing for raw sewage before the sewage leaches out of the cesspool.

A method for unclogging the openwork sheath of screw extruders used for sludge densification. The sheath is formed by a stack of superposed elements that are spaced apart from one another by elastic spacers, the latter creating a gap between each of the elements. The liquid and gaseous fractions contained in the sludge are expelled through the gaps. The stack is compressed during an extrusion cycle, with the spacers thus being squashed, thereby reducing the thickness of the gaps. During an unclogging cycle, the pressure is released, the spacers then returning to their original thicknesses and in this way increasing the size of the gaps, thus making it easier to unclog the latter.