The present invention discloses a tower-shape integrated ecological purification device for domestic sewage in a small town. The device includes a water storage and filter pond, a medium reverse osmosis pond, an amphibious biological reaction system, and an aquatic biological reaction system. The amphibious biological reaction system and the aquatic biological reaction system are alternately connected from the top down. The amphibious biological reaction system and the aquatic biological reaction system form an alternating dry and wet, oxidation-reduction compound environment. Plant absorption, biological substrate transformation, aeration, and strengthening medium adsorption are combined to form a multi-stage plant-microbe-animal integrated ecological purification treatment process/device. The present invention achieves the efficient purification and acceptable discharge of domestic sewage in small towns.

A solar-powered aeration device for sludge turnover and planting includes a grow bed fixed on a floating body and floats on water. A bottom of the floating body is fixedly connected with an inner pipe; an outer pipe is sleeved outside the inner pipe. The outer pipe is nested in an air chamber; a bottom of the air chamber communicates and is fixedly connected with a water inlet pipe; the water inlet pipe laterally communicates with a suction tube. An aeration ring is fixedly arranged at a bottom of the outer pipe, and the aeration tube has an air outlet pipe in communication with the outside. A movable foot is rotationally provided at a tail end of the suction tube, and the movable foot adapts to surface fluctuations to swing in a range limited by an angle limiter.

A resource treatment system for urine and feces separation and recovery in urine diversion dehydration toilets, includes a urine-faeces division toilet, a urine and gray water treatment system, and a fermentation and biodegradation fecal system. The urine-faeces division toilet is configured to separate and recover urine and feces discharged by users. The urine and gray water treatment system includes an adjusting pool, a microalgae culture device and a metal-based electrogenerated dynamic membrane. The adjusting pool is configured to receive the urine in the urine-faeces division toilet and domestic sewage, and adjust a urine-to-domestic sewage ratio. The metal-based electrogenerated dynamic membrane includes a metal microfiltration membrane, a stainless-steel mesh and a power supply. The fermentation and biodegradation fecal system includes a collection and adjusting device, a fermentation bed and a biodegradation chamber.

A system for growing algae for biofuel production includes a bioreactor configured to contain an algae slurry, an algae-water separator fluidly coupled to the bioreactor to receive and separate the algae slurry into algae and separated water, and an organics treatment system that receives a portion of the separated water and is configured to reduce a concentration of organics in the portion of the separated water. A recycle line conveys the portion of the separated water back to the bioreactor following processing in the organics treatment system, wherein the portion of the separated water is recycled and forms part of the algae slurry reducing the raw water demand of the bioreactor.

A method and system for reducing the concentration of nitrogen-bound nitrate from at least one of groundwater, surface water, or waste water is disclosed. The system includes an algal photobioreactor system. The photobioreactor includes a transparent tubular structure, a medium disposed inside the transparent tubular structure, and alga configured to adhere to the medium. The photobioreactor further includes a pump, and a light source. The method includes providing contaminant-containing water, adding the water to the algal photobioreactor system, adjusting at least one of temperature, ion concentration, CO.sub.2 concentration, pH, light wavelength, ion concentration or light intensity in the algal photobioreactor system to enhance growth of algae, removing water from the algal photobioreactor system, and harvesting the algal biomass. A system and method are also disclosed for reducing the concentration of organophosphates from water via an organophosphate-removing alga.

According to present disclosure, there is disclosed an algae growth and cultivation system that provides a cost-efficient means of producing algae biomass as feedstock for algae-based products, such as, fertilizer, feed, biofuel manufacture, and desirably impacts, nutrient recovery from waste streams for valued byproducts production, recycle water, and alternative/renewable energy production. The system as discussed herein is an integrated systems approach to wastewater treatment, algal strains selection for byproducts production, and recycle of algal biomass-processing waste or additional algae harvested as feedstock for products such as fertilizer production. Embodiments of a system as discussed herein present an economically viable algae production system and process that allows algae-derived products such as fertilizer, feed, biofuels, etc. to compete with non-organic or petroleum products in the marketplace.

A microalgae culture broth producing system includes a device for culture broth sterilization using a micro bubble generator, an air compression and pressure equalization device for the injection of carbon dioxide and oxygen in the atmosphere into the culture broth. The system also includes an air chilling device to maintain suitable culture broth temperature when water temperature is too high, an automatic carbon dioxide supply device to promote photosynthesis, and a sealed vertical photobioreactor to block out pollutants and increase dissolved carbon dioxide and oxygen concentration. The system further includes a high-efficiency harvesting device using hollow fiber membranes, and a hot air drying device using the waste heat generated by air compression.

The present disclosure is directed to a treatment system in a lagoon containing water that promotes the formation of biologically active granules that digest sludge in the lagoon, the lagoon comprising a bottom thereof, the water of the lagoon having a surface layer, the system including X number of water circulators in a cluster having an impeller disposed in the lagoon, wherein X is greater than or equal to three and hydraulic walls formed from at least some of the water expelled from each of a given pair of adjacent water circulators, wherein each of the hydraulic walls intersects at the midpoint of any two adjacent circulators, said hydraulic wall redirecting the expelled water downward towards the bottom of the lagoon, wherein the hydraulic walls at least partially surround at least one circulator.

The present invention is related to an anaerobic photobioreactor and a method for active biomass cultivation, wastewater treatment, nutrients recovery, energy production and high-value products synthesis. Phototrophic bacteria are cultured in the anaerobic photobioreactor lighted with solar or artificial irradiation where certain light wavelengths are selectively discarded with a light selector installed on the top of the photobioreactor. In this light-based process wastewater treatment and resources recovery, like nutrients and high-value bioproducts (fertilizers, polymers and proteins) present in wastewater are performed simultaneously. Cultured biomass is treated by anaerobic digestion for biofuel production, including optative hydrolytic pre-treatment, and/or valuable bioproducts can be obtained in a downstream process.

According to present disclosure, there is disclosed an algae growth and cultivation system that provides a cost-efficient means of producing algae biomass as feedstock for algae-based products, such as, fertilizer, feed, biofuel manufacture, and desirably impacts, nutrient recovery from waste streams for valued byproducts production, recycle water, and alternative/renewable energy production. The system as discussed herein is an integrated systems approach to wastewater treatment, algal strains selection for byproducts production, and recycle of algal biomass-processing waste or additional algae harvested as feedstock for products such as fertilizer production. Embodiments of a system as discussed herein present an economically viable algae production system and process that allows algae-derived products such as fertilizer, feed, biofuels, etc. to compete with non-organic or petroleum products in the marketplace.