Systems and methods for intensive recirculating aquaculture are provided herein. An example system includes water sourced from a first segment of a saline aquifer, a recirculating aquaculture system receiving the sourced water and producing discharge water, and a water discharge point located within a second segment of the saline aquifer disposed below the first segment of the saline aquifer.

A biofilm composite carrier and a preparation method and use thereof are provided. The biofilm composite carrier includes a polyurethane framework, an adhesive and a functional material, wherein the functional material is adhered to the surface and pores of the polyurethane framework through the adhesive, and the functional material is a mixture of zeolite and tourmaline. The biofilm composite carrier is beneficial to the quick start-up and stable operation of the municipal sewage deammonification system under conditions of low temperature and low ammonium.

A method for improving the quality of pond water used in aquaculture applications by adding to the pond water active bacteria that are preferably germinated from spores on site using a nutrient-germinant composition and an incubation method for increased spore germination efficiency, in combination with a nitrification enhancement agent such as calcium carbonate or calcified seaweed, and an optional reaction surface area modifier such as calcified seaweed or plastic or metal particles or fragments. The nutrient-germinant composition comprises L-amino acids, D-glucose and/or D-fructose, a phosphate buffer, an industrial preservative, and may include bacteria spores (preferably of one or more Bacillus species) or they may be separately combined for germination. The incubation method comprises heating a nutrient germinant composition and bacteria spores, to a temperature range of 35° C. to 60° C. for around 2 to 60 minutes to produce an incubated bacteria solution that is discharged to the aquaculture application.

This disclosure provides an integrated system and method for producing purified water, hydrogen, and oxygen from contaminated water. The contaminated water may be derived from regolith-based resources on the moon, Mars, near-Earth asteroids, or other destination in outer space. The integrated system and method utilize a cold trap to receive the contaminated water in a vapor phase and selectively freeze out water from one or more volatiles. A heat source increases temperature in the cold trap to vaporize the frozen contaminated water to produce a gas stream of water vapor and volatiles. A chemical scrubber may remove one or more volatiles. The integrated system and method utilize ionomer membrane technology to separate the water vapor from remaining volatiles. The water vapor is delivered for crew use or delivered to an electrolyzer to produce hydrogen and oxygen.

Disclosed are a baffled integrated denitrifying and decarbonizing device with anaerobic bio-nests and a baffled integrated denitrifying and decarbonizing process with anaerobic bio-nests thereof. The wastewater with low carbon-nitrogen ratio first enters anaerobic chamber I, then enters anaerobic chamber II and chamber III to complete anaerobic decarbonization and denitrification. The chambers are provided with modified basalt fiber carrier media to enrich a large number of functional microorganisms, and improve the device in terms of anaerobic treatment efficiency. Fermentation liquid in chamber III then flows back to aerobic chamber IV to complete the nitrification process. Nitrified liquid enters chamber I and mixes with influent for further treatment, and effluent is finally discharged from chamber III. The clapboard and basalt fiber felt in chamber IV can retain and enrich autotrophic/heterotrophic nitrifying bacteria.

There is described a particulate carbon adsorbent comprising 60 to 90% by wt carbon, wherein the particulate carbon adsorbent is a fibrous pyrolysis product of an organic fraction of waste screenings, and wherein the fibrous pyrolysis product predominantly comprises fibres having a diameter in the range about 10-40 μm and a length in the range about 50-500 μm. A method of manufacture is also described. The particulate carbon adsorbent is useful in of odour prevention in wastewater treatment and other wastewater processes.

Provided are a water treatment method and a water treatment device wherein in a biological treatment of ammonium nitrogen-containing water to be treated, the water to be treated can be treated stably at a high treatment speed even when the nitrogen concentration of the water to be treated is high. This water treatment device biologically treats ammonium nitrogen-containing water to be treated. The water treatment device (water treatment method) is provided with: a nitrification device (nitrification step) for oxidizing ammonium nitrogen to nitrite or nitrate nitrogen using nitrifying bacteria including autotrophic ammonia-oxidizing bacteria and nitrite-oxidizing bacteria contained in microbial activated sludge; and a nitrification rate control means which maintains a molybdenum compound in the nitrification device in such a manner as to control the molybdenum concentration of the water to be treated to 0.025 mg Mo/gN or more, and controls the nitrification rate for the sludge to 0.11 [kgN/(kgVSS.Math.day)].

An improved system and method for extracting volatile organic compounds (VOCs) such as ammonia from leachate water. Uses specialized pressurization of leachate water to extract VOCs which may then be recaptured in more highly concentrated water to reduce overall volume of contaminated water.

Systems and methods of restoring a lake including dredging, island creation, water treatment, real estate development, computer modeling of environmental conditions, wave height reduction, sediment removal and encapsulation, bathymetry contouring, littoral zone restoration, plant restoration, and/or fish restoration.

This disclosure concerns a system for purifying contaminated water and a method for using the system. More specifically, the invention concerns removing contaminants, such as those introduced by fracking, from a contaminated water.