The present invention is a modified apparatus for wastewater recycling including a toilet tank device, a water amount control assembly, and a three-way pipe. The toilet tank device includes a filtering space provided with a filtering apparatus and a water level sensing apparatus and a device area provided with a pressurizing device, at least one filter, and a transfer pipe. The water amount control assembly includes a driving apparatus, a cleaning pipe group, and a wastewater transfer pipe group. When clean water is transferred to clean the filter, the clean water can be transferred through a combination of the cleaning pipe group and the pressurizing device with a water amount controlled by the driving apparatus, and wastewater passing through the filtering apparatus can be transferred through a combination of the wastewater transfer pipe group and the pressurizing device with a water output amount controlled by the driving apparatus.

The present invention relates to a method of wastewater treatment in which a filter aid prepared by extrusion of freshly harvested wet lignocellulosic feedstocks or by extrusion of wet lignocellulosic feedstocks having dry matter content 30-75% (w/w) is used to collect sewage sludge and the combined spent filter aid with collected sewage sludge is used for hydrothermal conversion.

A method to continuously stabilize and cool effluent temperatures in FOG (Fats, Oils and Greases) discharged into Grease Traps (GT) or Grease Interceptors (GI). Temperature stabilization/cooling became necessary with the introduction of water efficient dish washing systems that produce discharge water too high in temperature to maintain a functioning grease interceptor/trap. This temperature stabilization/cooling is achieved with Bio-Elements located inside the grease interceptor or grease trap, therefore representing an in-situ process.

Temperature stabilization/cooling is achieved by continuously measuring the effluents' temperature inside the FOG enclosure and by controlling air pumps to achieve the necessary cooling to restore the GT/GI designed function. Said air supplies the needed oxygen to maintain an aerobic biofilm suitable for bioremediation, maintain flow through the Bio-Elements, and also to cool the effluent, which is typically too high in temperature to enable effective bioremediation or function of a grease interceptor.

The present invention relates to a device and a process for purification of grey water. In particular the invention relates to in-home purification of grey water generated from laundry wash and/or rinse liquor for water saving by re-use. Surprisingly it has been found that it is possible to design a device and a process where, by continuous aeration, foam breaking and separation, the laundry wash and rinse water can be made substantially free of surfactants. This water is then preferably filtered to recover fresh water which can be reused for multiple applications.

A batch process for the treatment of an aqueous solution so that the treated product is more desirable for disposal includes obtaining an influent batch of aqueous solution for treatment, treating the batch of solution by an advanced oxidation process. The advanced oxidation process including causing ozone to be mixed with the solution, maintaining the mixture of solution and ozone at a pressure above atmospheric for a time of at least two seconds. An embodiment of the process includes continuously recirculating the fluid to be treated, through a recirculation conduit, the recirculation conduit including an ozone injector and the ozone injector is adapted to inject ozone into the aqueous solution as the aqueous solution circulates through an ozone injector. Influent to be treated may be selected from the group including sewage, septage, leachate, ballast or other aqueous solutions where it is desirable to treat the fluid prior to disposal, further treatment, or reuse. The process is carried out to improve a level of disinfection and/or denutrification of the effluent. The process may include back-to-back processing of batches one after the other, more or less continuously. The process may include overlapping processing, in which part of a treated previous batch is retained to mix with an incoming untreated batch. The process may include off-gassing between stages of adding ozone, and the process may involve repetitive high pressure and low pressure cycles. The process may include post processing steps, such as permitting at least a portion of a treated batch to be retained without the addition of ozone for a period of time to permit floculates longer to form. The process may include post process filtering, which may be single or multi-stage filtering, such as may allow for the removal of floculates. The process may include simultaneous post-processing of part or all of one batch while another batch is being processed. The process may include the treatment of solutions containing pharmaceuticals to break down the pharmaceuticals.

A water-using household appliance includes a pump sump, a filter element arranged at least partially in the pump sump, and a nozzle unit arranged on the pump sump. The nozzle unit produces an annular flow between the pump sump and the filter element in order to remove dirt from the filter element, with the annular flow flowing around the filter element only in one direction of flow.

An auxiliary gray water supply device captures used wash water from a commercial warewashing machine for supply to a pre-rinse station without substantial modification of the commercial warewashing machine. The captured wash water and treatment agent are delivered to a pre-rinse station for pre-rinsing of dishes that will be washed within the commercial warewashing machine.

The invention relates to a program-controlled apparatus (1) for washing items that is equipped with a water purification system (8) for purifying the wash liquor by removing detergent and suspended soil, which purification system (8) utilizes addition of flocculant, wherein the amount of flocculant that is added is controlled to minimize the total amount of flocculant used without compromising the efficacy of the purification treatment.

A wastewater reuse system has a wastewater treatment system connected to a dwelling for receiving wastewater therefrom. The wastewater treatment system has a pump tank with an outlet that can be connected to a central wastewater collection system. There can be a pump in the pump tank for pumping water from the pump tank to a use recipient of treated wastewater such as an irrigation system.

The efficiency of water disinfection can be significantly increased by supplying the ozone in combination with oxygen to an inlet of a cavitation pump. The ozone and the oxygen are turned into ultra-fine bubbles via cavitation action within the pump, facilitating the dissolution of the oxygen and ozone within the water. The water mixed with the oxygen and the ozone is subsequently supplied to a line atomizer, where the dissolution of the ozone within the mixture is completed. The combined use of the cavitation pump and the line atomizer can lead to a substantially complete dissolution of the supplied ozone within water that needs to be disinfected, allowing to easily achieve the concentration of ozone necessary for water disinfection. Due to this efficiency, the system and method described are highly scalable and suitable for water purification at water purification plants of various sizes.