The present invention is a process, a method, and system for recovery and concentration of dissolved ammonium bicarbonate from a wastewater containing ammonia (NH3) using gas separation, condensation, and crystallization, each at controlled operating temperatures. The present invention includes 1) removal of ammonia from waste (sludges, semi-solids, and solids and liquids) without the use of chemicals at a temperature of at least 80 degrees Celsius, 2) condensing the gaseous containing ammonia, carbon dioxide and water vapor to remove water vapor concentrating the amount of gaseous ammonia and carbon dioxide, 3) concentrating the ammonia and carbon dioxide in the water by established means, such as concentrating the gas using partial condensation followed by passing the concentrated gas through an absorption column at a temperature of between about 20 and 50 degrees Celsius to form dissolved ammonium carbonate and ammonium bicarbonate, or total condensation followed by dewatering using reverse osmosis, and 4) crystallizing concentrated dissolved ammonium carbonate and ammonium bicarbonate at a temperature of less than about 35 degrees Celsius to form solid ammonium bicarbonate and ammonium carbonate.

Provided is a non-linear model predictive control (NMPC) system for automatic and optimum start-up of an anaerobic digestion (AD) system. The NMPC provides an optimum set of values of manipulated variables for controlling some of the key AD process variables during start-up. The NMPC based automatic start-up system was evaluated against a virtual AD process plant scenario involving a high rate AD reactor treating a readily biodegradable carbohydrate based substrate.

A wastewater treatment method applicable to new or existing enhanced biological phosphorus removal (EBPR) treatment process designs which utilize the sequencing batch reactor (SBR) process activated sludge process treatment tanks. The method improves the performance and efficiency in the treatment of municipal and industrial wastewater to remove phosphorus (P) and nitrogen (N). The method includes ceasing reaction cycles when a derivative of rate of change of the input flow volume of the air stream into the tank needed to maintain a low-range of dissolved oxygen (DO), in which an oxidation reduction potential (ORP) setpoint reaches a derivative value indicating that conversion of the ammonia nitrogen in the influent wastewater content to a nitrite or to a nitrate is complete.

A propeller for a digestion tank mixer. The propeller has a hub and at least two blades. Each blade has an outer geometrical plane parallel to a center axis, perpendicular to a radius of the propeller, intersecting both a leading edge and a trailing edge of the blade, and an inner geometrical plane parallel to the outer geometrical plane and tangent to the hub. Each intermediate geometrical plane of the blade has an arc-shaped cross section extending between the leading edge and the trailing edge, and a chord extending between the leading edge and the trailing edge. An angle between the chord and a radial plane of the propeller is 25-45 degrees in each intermediate geometrical plane. The ratio between an arc-height between the chord and the thrust side surface, and the length of the chord, is 0.08-0.15 in each intermediate geometrical plane.

A modular system for waste treatment, water recycling, and resource recovery includes a buffer tank to receive and pre-treat raw organic waste, at least one reactor tank configured as an anaerobic bioreactor that receives and digests pre-treated waste from the buffer tank, a membrane module having a membrane configured to filter waste from the digested waste from the at least one reactor tank to produce a permeate, a permeate collection tank configured to collect and store the permeate generated by the membrane module, a pump system having a plurality of pumps, and a control system configured to monitor the flow of waste and to control the pump system to control the flow of waste between the buffer tank, the at least one reactor tank, the membrane module, and the permeate collection tank.

A septic system is provided that includes a septic tank having a plurality of compartments with a tank inlet in a first compartment. First and second vaults are positioned in a second compartment. The first vault receives fluid from the first compartment at a level near a fluid surface in the tank. A first flow inducer receives fluid from the first vault at a level near a bottom of the first vault, and releases fluid into the second compartment at a level near the fluid surface. The second vault receives fluid from the second compartment at a level near a bottom of the second vault and discharge fluid at a level near the fluid surface. Third and fourth vaults and a second flow inducer are positioned in a third compartment, the third vault receiving fluid from the second vault, and the fourth vault discharging fluid to a tank outlet.

A portable and modular renewable energy microgeneration apparatus is disclosed that includes at least four modular units. The first modular unit includes a mixing tank and a chopper. The second modular unit includes a buffer tank, a liquor tank, and a pasteurization tank that pasteurizes waste that has been mixed with liquid from the liquor tank by the mixer, chopped into smaller sized components by the chopper, and pre-warmed by the buffer tank. The third modular unit includes a digestion tank that performs anaerobic digestion on pasteurized waste received from the pasteurization tank. And the fourth modular unit includes a gas storage tank that stores gas generated by the waste in at least one of the mixing tank, the chopper, the buffer tank, the liquor tank, the pasteurization tank, and the digestion tank. Each of the four modular units is both portable and modular.

The present invention provides a process for producing biogas and/or methane from solid spent cereal products derived from, for example, the mashing process of malt whisk(e)y and/or beer production. There is also provided a system for producing biogas and/or methane from solid spent cereal products derived from, for example, the mashing process of malt whisk(e)y and/or beer production.

The present invention provides a process for producing biogas and/or methane from solid spent cereal products derived from, for example, the mashing process of malt whisk(e)y and/or beer production. There is also provided a system for producing biogas and/or methane from solid spent cereal products derived from, for example, the mashing process of malt whisk(e)y and/or beer production.

A system includes an anaerobic digestion tank, a gas storage tank, a power generator, a power distribution system, and an electronic control system. The anaerobic digestion tank receives biological waste from a sewer line of a multi-unit building, and allows the received biological waste to be digested to produce a combustible gas. The gas storage tank stores the combustible gas. The power generator combusts the combustible gas to produce at least one of electrical power or heat. The power distribution system receives the electrical power from the power generator, stores at least some of the electrical power, and distributes at least some of the stored electrical power to one or more electrical devices. The electronic control system controls an operation of the system.