A method for preparing an electron donor biofilm carrier includes proportioning organic polymer basic raw material and functional modifiers in a range of set-point, mixing the materials, feeding the mixtures into a screw extruder, processing them into a bar-type material, and then cut the bar-type material into granules with the cutting machine, and feeding the granules into the screw extruder, processing them into pipes of various shapes according to the selected screw extruder heads, and then cutting the pipes according to the required size. The electron donor biofilm carrier is mainly used in anaerobic or anoxic suspended carrier biofilm technologies. Electron donors with a standard electrode potential below 100 Mv are used as the functional material for preparation of electron donor biofilm carrier.

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 intensification of advanced biological nitrogen removal and reduction of endocrine disrupting toxicity, and belongs to the technical field of advanced wastewater treatment includes the steps of utilizing the reaction of calcium sulfate and hydrogen peroxide solution under alkaline conditions to prepare nano-calcium peroxide (n-CP) oxygen-releasing materials, then the polyvinyl alcohol is used as a framework material, the sodium carboxymethyl cellulose is used as a bonding agent, the stearic acid is used as buffering agent and stabilizing agent, the prepared n-CP is used as an oxygen-releasing material, and the quartz sand is used to increase the material density to the sustained-release calcium peroxide nanoparticles (SR-nCPs) through the encapsulation method.

A treatment process for municipal, commercial, industrial, and institutional fluids containing one or more substances at a first concentration includes a contactor, an aerator, and a separator. The fluid is mixed with a powdered natural lignocellulosic material (“PNLM”), a microbial growth inoculum, and at least a portion of the fluid in the contactor to provide a mixture that includes an established, acclimated microbial growth in the fluid. The mixture is introduced to an aerator where physical binding and chemical bonding of at least some of the one or more substances to the PNLM additionally physiological uptake by microbial growth in a biosludge reduces the concentration of at least some of the one or more substances in the fluid discharged from the aerator to a second concentration. The biosludge is separated to recover at least a portion of the PNLM that is recycled to the contactor.

An aerobic treatment system includes a plurality of highly porous, high surface area, inert, synthetic, inorganic, or natural material particles, having a specific gravity of less than 1.0 that float on an enclosed aqueous environment whereby plants and/or microbes can be grown thereon and/or animals such as fish can be raised therein. The inert particles trap air bubbles and nutrients for the growth of diverse types of plants, animals, or microbial systems, which enable phyto treatment of an aqueous waterbody with the ability to limit the growth of unwanted plant and algae such as blue-green algae. The above aerobic bio treatment system contains desirably bioremediation media having one or more microorganisms that are able to withstand system shocks while minimizing energy usage associated with aeration. The system can generally be utilized in any aqueous environment such as waste water and/or polluted water in an enclosed area such as a container, tank, pond, lake, or the like.

A process for removal of selenium and nitrate from waste water includes both electrochemical and bioprocessing treatment. Embodiments include use of activated walnut shell a growth media for selenium-reducing bacteria.

A modular liquid waste treatment system is disclosed. In accordance with some embodiments, the system includes a central distribution unit and one or more treatment fins in flow communication therewith. The distribution unit may be configured to receive liquid waste from a given source and distribute that waste, at least in part, to one or more treatment fins. In turn, bacteria present in a given treatment fin treat the liquid waste, and the resultant treated liquid may drain from the fin to the surrounding environment. In some embodiments, a given treatment fin may include porous media providing a large surface area on which bacteria may grow to facilitate treatment. The system may be installed in and/or above the ground, and in some cases may be surrounded, at least in part, with treatment sand and/or other treatment media. The system may be used in aerobic and/or anaerobic processing of liquid waste.

A water cleaning system 1 includes an aerobic region 90 including breeding water 9 containing organic matter and oxygen, an aerobic layer 6 linking with the aerobic region 90 and inhabited by aerobic bacteria, a facultative anaerobic layer 5 provided adjacent to the aerobic layer 6 and inhabited by facultative anaerobic bacteria, an obligatory anaerobic layer 4 provided adjacent to the facultative anaerobic layer 5, inhabited by obligatory anaerobic bacteria, and made of andosol 40, an anaerobic space 3 having an anaerobic environment, allowing the obligatory anaerobic bacteria inhabiting the obligatory anaerobic layer 4 and products therefrom to flow therein, and a tube 18 as linking means linking the anaerobic space 3 and the aerobic region 90.

A process in which a waste stream containing microbes and organic constituents is passed through a process environment comprising a solid media, microbes, and higher animals, such that some of the microbes and/or organic constituents within the waste stream are removed from the waste stream and some of the removed microbes are destroyed or consumed by the higher animals. The process environment may include an irrigated environment, a submerged environment, or a combined environment.

A lightweight, bioplastic, mobile, floating oil spill mechanical/biological recovery system is dimensionally compact, and quick to assemble. The floating platform can be readily positioned within any waterborne oil/contaminant spill area. After assembly, this platform or apparatus can be directed by either a hand-held digital radio control transmitter or GPS directed mechanism. A lower, multi-roller slip-on belt is designed to be mounted over a circular base support aeration hub assembly with alternating/spaced slotted ring water drainage separators. The belt and aeration assemblies dip bioaugmentation product into the contaminant site thereby exposing microorganisms to both oxygen and target contaminant for treatment and metabolism. Various mechanisms for enhancing metabolic activity of the bioaugmentation product operate in tandem with the primary belt and aeration assemblies to promote effective contaminant metabolism and overall treatment regimes.