A membrane photobioreactor for treating nitrogen and phosphorus that are out of limits in a biogas slurry and treating method thereof, relating to biogas slurry treatment. The membrane photobioreactor for treating nitrogen and phosphorus that are out of limits in a biogas slurry is provided with a biogas slurry storage tank, peristaltic pumps, a microalgae cultivating tank, an air pump, a membrane photobioreactor and a hollow fiber membrane. The biogas slurry containing nitrogen and phosphorus that are out of limits is stored in the biogas slurry storage tank, and is driven by a first peristaltic pump to circularly flow in a silicone pipe; a microalgae solution is cultivated under illumination in the microalgae cultivating tank, and is driven by a second peristaltic pump to circularly flow in a silicone pipe, air is fed into the microalgae cultivating tank through the air pump, the biogas slurry and the microalgae solution are converged in the membrane photobioreactor, and the biogas slurry circularly flows inside the hollow fiber membrane pipe and the microalgae solution circularly flows outside the hollow fiber membrane pipe, the two being in a cross flow; and the nitrogen and phosphorus that are out of limits in the biogas slurry penetrate from the inside of the hollow fiber membrane and are absorbed by the microalgae solution outside the membrane, and after cyclical cultivation, nitrogen and phosphorus that are out of limits in the biogas slurry are absorbed, and the discharge standards are achieved.

A process of removal and recovery of metal-cyanide complex from effluents is disclosed. The process includes isolating a species of Scenedesmus via enrichment culture technique in alkaline medium. The process further includes releasing the species of Scenedesmus, after being isolated, in the effluents at predetermined conditions including a predefined pH and a predefined temperature. The species of Scenedesmus released in the effluents at the predetermined conditions: degrades cyanide moiety of a metal-cyanide present in the effluents and releases the metal ions; utilizes the carbon and nitrogen from the cyanide or metal cyanide complex present in the effluents; accumulates a first fraction of metal ions from the solution; and bio-sorbs the second fraction of the metal ions onto the cells of the microalgae thereby resulting in the removal of both the cyanide and the metal from the effluents. The metal-cyanide complexes comprise at least one of a copper-cyanide and a zinc-cyanide.

Metal bioremediation and metal mining strategies can include compositions and methods.

A method of exposing microorganisms to a condition wherein the condition facilitates or inhibits growth of a specific species of microorganisms or a specific consortium of microorganisms. The condition may also stimulate microorganisms to uptake a pollutant from a fluid and/or release the pollutant. Furthermore, the microorganisms may also be harvested and used as a foodstuff for human and animal consumption.

The present disclosure relates to methods of culturing algae that overcomes catabolic repression of photosynthesis in mixotrophic growth.

Provided herein are compositions and methods that can remove, metabolize, or degrade a hydrocarbon in an area that is contaminated by hydrocarbons. Methods for bioremediation of an area such as an area of land, a body of water, or a shoreline that are contaminated by a hydrocarbon, such as from a crude oil spill are also described. The compositions and methods described herein can be used on natural flora and fauna as well as manmade materials that are contaminated by a hydrocarbon.

The present disclosure provides a system for processing ultramafic material. The system may comprise a reactor for accelerating weathering of said ultramafic material. The reactor may comprise one or more chambers comprising one or more microbes, biological medicators, or enzymatic accelerants to facilitate the weathering of the ultramafic material.

A self-contained closed aquaponics system comprises an aquarium tank attached side-by-side to a water container for growing plants, having a shared side. An electrically powered water pump streams the water from the aquarium tank via a pipe to the bottom of a compartment in the water container. When the water in the water tank exceeds a pre-set water level, the water are poured back to the aquarium tank via a recess or slit in the shared side. The compartment may comprise a bio-filter that is a sponge filter, a foam cartridge filter and the undergravel filter. The aquarium tank or the water container may be rectangular or cuboid shaped. A cover adapted to cover the water container may include multiple openings for mounting plants in pot nets therein, where roots of the plants are fed from the fish excretions in the aquarium tank after being filtered by the bio-filter.

In one embodiment, a dilute wastewater treatment system includes a separation subsystem configured to receive dilute wastewater and separate it into a product stream containing a low concentration of organic material and a reject stream containing a high concentration of organic material, and a conversion subsystem configured to receive the reject stream from the separation subsystem and anaerobically treat the reject stream to break down the organic material and separate it from water within the reject stream.

The present invention relates to a system or method for the remediation of wastewater with a treatment media in tandem with an electrocoagulation system. The system and method also include cleaning elements for cleaning distribution lines within the system and for cleaning the electrocoagulation system.