A low-pressure high-flux hollow fiber nanofiltration (NF) membrane, and a preparation method and use thereof are provided. The low-pressure high-flux hollow fiber NF membrane includes a base membrane and a negatively-charged separation layer formed on a surface of the base membrane, where a material of the separation layer is a crosslinking product of a negatively-charged sulfonated polymer. The low-pressure high-flux hollow fiber NF membrane of the present disclosure solves the technical problem that the hollow fiber NF membranes in the prior art are difficult to have both high performance and low energy consumption.

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 water treatment system including a filter compartment having a filter material adapted for removing at least one of neutrons and alpha particles from water. The filter material may comprise at least one of paraffin, cadmium, and bismuth. The filter compartment can also have a second filter material adapted for removing at least one of chloride ions and transmuted chlorine ions from the water. The second filter material may comprise at least one of coconut carbon, silicon dioxide, and ionized sand. The system can further include a container downstream of the filter compartment, the container having paraffin therein. Additionally, the system can include an absorptive manifold designed for absorbing hydrogen ions and reducing the pH of the water. A method for treating contaminated water using the water treatment system is also provided.

A water treatment system including a filter, an aerator, a hydrogen absorption manifold, a first treatment container, a second treatment container, a magnetron, a boiler, a superheater, a fractional distillation separator and a condenser. The filter is adapted for removing chloride ions and transmutated chlorine ions, while the hydrogen absorptive manifold is designed for absorbing hydrogen ions and reducing the pH of the water. The magnetron alters the spin of an electron in an outer shell of an atom contained in the water so that a solution added to the water coats selective elements causing them to precipitate from the water. The boiler and superheater may be utilized to convert the water to a superheated steam, while the fractional distillation separator is adapted for condensing and separating elements, including radioactive elements, from the superheated steam. A method for treating contaminated water using the water treatment system is also provided.

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.

A filtration system can comprise a pressure pump configured to apply a pressure on fluid flowing between a first chamber and a second chamber. The filtration system can also comprise a flow sensor configured to determine at least one parameter associated with fluid flowing across a membrane deposited between the first chamber and a second chamber. The filtration system can comprise a pressure sensor configured to determine pressure readings of the fluid flowing from the first chamber to the second chamber. The filtration system can comprise a filtration management system configured to cause the pressure pump to apply a constant pressure on fluid flowing across the membrane for a first predetermined time based on the pressure reading. The filtration management system can be configured to cause the pressure pump to reverse the fluid flow across the membrane based on the at least one parameter for a second predetermined time.

A recirculating cooling system includes a coolant sampling line, a deterministic lateral displacement (DLD) microfluidic separation device, a monitoring device, and an alert generation device. The coolant sampling line is in fluid communication with a recirculating coolant line, and the DLD microfluidic separation device receives a coolant sample diverted into the coolant sampling loop from the recirculating coolant line via the coolant sampling line. The DLD microfluidic separation device includes a separation array for separating bacteria into an output channel according to a size threshold. The monitoring device monitors a characteristic property of the coolant sampling loop for comparison to a threshold for bacterial growth in the recirculating cooling system. The alert generation device generates an alert to remediate the bacterial growth in the recirculating cooling system responsive to the characteristic property of the coolant sampling loop satisfying the threshold.

A method for producing a microbiologic agent is described. The method includes a step of adding biomass containing a target compound-degrading microorganism and an inorganic microparticle carrier to a medium containing a target compound. The microorganisms included in the biomass are carried on the inorganic microparticles, and the medium is cultured while monitoring an abundance ratio of the target compound-degrading microorganism in microorganisms carried on the inorganic microparticle carrier. After the abundance ratio of the target compound-degrading microorganism reaches a predetermined value, the inorganic microparticle carrier carrying the target compound-degrading microorganism is collected to obtain the microbiologic agent.

Disclosed herein are methods, systems, and devices for generating electricity from an effluent source. In the presence of electrogenic bacteria and substrate electrodes, an electroactive biofilm is produced which possesses bioconductive capacity for efficiently producing an electric current while treating an effluent source such as, e.g., wastewater. This disclosure relates generally to the production of electricity from a biological source. In particular, this disclosure relates to microbial fuel cells (MFCs) and other bioelectrochemical systems (BES) that exploit an exogenous fuel source.

The disclosure relates to a system for separating waste. The waste separating system includes a compacting assembly, a liquid diverting assembly, and a controller configured to control aspects of the compacting assembly and the liquid diverting assembly. The waste separating system can divert waste liquid from a manufacturing assembly to a liquid diverting assembly, where a controller is configured to selectively control a flow of the waste liquid to a drain or to a storage tank.