The present disclosure relates to a bacterium-alga coupled sewage treatment device based on energy recycling and a use method thereof. The device comprises a pretreatment device, a photobioreactor, an alga separation apparatus, a continuous flow bioreactor and a secondary sedimentation tank which are sequentially connected in order, the pretreatment device being connected to a municipal sewage inlet pipe, the photobioreactor being connected to a carbon dioxide gas charging device through a gas filling pipeline, one part of a sludge thickening tank being connected to the secondary sedimentation tank, the other part thereof being connected to remaining sludge of the pretreatment device, carbon dioxide generated from the sludge which flows through the thickening tank and is thermally-hydrolyzed and anaerobically-acidified being connected to the photobioreactor through a gas inlet pipeline, and the alga separation apparatus being further connected to a filter press. The present disclosure has the advantages of a rational structural design, reliable and stable operation, a low operation and maintenance cost and high automaticity and intelligence, and being suitable for the use and transformation requirements of a wide range of sewage treatment plants, etc.

A rotating biological contactor (RBC) is provided that includes a media wheel with a plurality of vanes configured for growth of algae thereon. The media wheel is configured for rotation by air directed from an air diffuser to impinge on the vanes such that when said media wheel is partly immersed in water rotation of the media wheel alternately exposes algae growing on the plurality of vanes to sunlight and to the water. A frame is connected to an axle of the media wheel. Only one of the media wheel and the frame is constructed with a buoyancy sufficient to support the media wheel partly immersed in water during rotation of the media wheel.

A composition for remediation of soil and groundwater containing halogenated compounds. The remediation composition includes an elemental iron-based composition, which may include activated carbon capable of absorbing the halogenated compounds with numerous pores impregnated with elemental iron. The remediation composition further includes a first bioremediation material including a blend of one-to-many organisms capable of degrading the halogenated compounds. The remediation composition includes an organic compound or polymeric substance and a second bioremediation material including a blend of one-to-many organisms capable of degrading the organic compound or polymeric substance over time (e.g., 20 to 365 or more days to provide a time release substrate-creating material or platform) into smaller molecules or compounds used by the organisms in the first bioremediation material while degrading the halogenated compounds. The organic compound may be a complex carbohydrate such as food grade starch, chitin, or other complex carbohydrate such as one with low water solubility.

Transportable wastewater treatment systems and wastewater treatment methods are provided, which employ a clarification unit to treat highly polluted wastewater (e.g., with BODs over 400 mg/l and up to 1500 mg/l) with a small footprint and without elaborate infrastructure or even without grid-based energy sources. The clarification unit comprises an anaerobic digestion unit configured to receive influent and reduce an organic load thereof to yield a first stream, an aerobic anoxic air lift reactor configured to treat the first stream and further reduce the organic load thereof to yield a second stream, and an aerobic unit configured to clarify the second stream and deliver effluent, the aerobic unit comprising a plurality of vertical sheets configured to support growth of algae on biofilm, a sprinkling system configured to sprinkle the second stream onto the vertical sheets, and an organic matter removal unit configured to collect organic mass falling off the vertical sheets.

A composition for remediation of soil and groundwater containing halogenated compounds. The remediation composition includes an elemental iron-based composition, which may include activated carbon capable of absorbing the halogenated compounds with numerous pores impregnated with elemental iron. The remediation composition further includes a first bioremediation material including a blend of one-to-many organisms capable of degrading the halogenated compounds. The remediation composition includes an organic compound or polymeric substance and a second bioremediation material including a blend of one-to-many organisms capable of degrading the organic compound or polymeric substance over time (e.g., 20 to 365 or more days to provide a time release substrate-creating material or platform) into smaller molecules or compounds used by the organisms in the first bioremediation material while degrading the halogenated compounds. The organic compound may be a complex carbohydrate such as food grade starch, chitin, or other complex carbohydrate such as one with low water solubility.

Transportable wastewater treatment systems and wastewater treatment methods are provided, which employ a clarification unit. to treat. highly polluted wastewater (e.g., with BODs over 400mg/l and up to 1500mg/l) with a small footprint and without elaborate infrastructure or even without grid-based energy sources. The clarification unit comprises an anaerobic digestion unit configured to receive influent and reduce an organic load thereof to yield a first stream, an aerobic anoxic air lift reactor configured to treat the first stream and further reduce the organic load thereof to yield a second stream, and an aerobic unit configured to clarify the second stream and deliver effluent., the aerobic unit. comprising a plurality of vertical sheets configured to support growth of algae on biofilm, a sprinkling system configured to sprinkle the second stream onto the vertical sheets, and an organic matter removal unit configured to collect organic mass falling off the vertical sheets.

A method for nitrate removal from drinking water. The method includes adapting a sludge including hydrogenotrophic denitrifiers (HTDs) by dominating the HTDs in the sludge, cultivating a microalgae biomass, forming a microalgae-HTD biomass by cultivating a mixture of the adapted sludge and the cultivated microalgae biomass, nucleating a plurality of microalgae-HTD granules by cultivating the formed microalgae-HTD biomass in a sequencing batch (SB) mode with a constant HRT, growing the plurality of microalgae-HTD granules by cultivating the nucleated plurality of microalgae-HTD granules in an up flow (UF) mode with a reducing HRT, and continuous nitrate removal from nitrate-contaminated water with a minimum HRT over the grown plurality of microalgae-HTD granules.

A reactor for water splitting or water treatment includes a first electrode, a second electrode electrically coupled to the first electrode, and a proton exchange membrane separating the first electrode and the second electrode. The first electrode includes a first optical fiber coated with a photocatalytic material.

Engineered stable multi-organism (or multi-cell type) communities encapsulated in a media that slows or prohibits certain metabolic functions such as cell division, but maintains other metabolic functions.

Systems and methods for aerobically processing waste, in which an aerobic bioreactor is in selective fluid communication with a source of oxygen-rich liquid medium. The aerobic bioreactor is configured for aerobically processing waste via bacteria fixed on media to provide processed effluent from the waste. The source of oxygen-rich liquid medium is different from the aerobic bioreactor.