A process for purification of waste from zootechnical sources or from small agri-food companies is provided. A plant for carrying out the wastewater treatment process is also provided.

A source liquid including a solvent with a dissolved impurity flows into a reservoir. The source liquid or a concentration of the source liquid is pumped from the reservoir through a pressure exchanger into an upstream side of a liquid-separation module. The module includes a membrane that at least partially purified solvent as filtrate to a permeate side of the liquid-separation module while diverting the impurity in a feed retentate on the upstream side of the liquid-separation module. The substantially pure water is extracted from the permeate side of the liquid-separation module, while the feed retentate is passed from the upstream side of the liquid-separation module through the pressure exchanger, where pressure from the feed retentate is transferred to the feed from the reservoir. The feed retentate is then passed from the pressure exchanger to the reservoir and recirculated as a component of the feed via the above steps.

The present disclosure relates to a method and device for obtaining distillate from non-potable water. The method comprises the steps of utilizing solar power from a solar power system to produce electricity and steam, utilizing the electricity and the steam in a water treatment device to convert the non-potable water into distillate and concentrate, transporting at least a part of the distillate to consumers for use. The method and device provide multiple effect distillation (MED) combined with vapour compression (VC) being able to work 24 hours a day only on solar energy.

A multi-stage anaerobic digester is designed to treat a high solids, stackable feedstock. The system may also receive a pumpable feedstock such as a slurry or sludge. In a first stage, the digestate circulates in one direction around a raceway such that the digestate may pass a feed inlet multiple times before leaving the first tank. An optional side stream loop withdraws fibrous material from near the top of the reaceway and return digestate with chopped fibers, preferably lower and further along the raceway. An outlet from the raceway located near, but upstream of the feed inlet discharges partially digested substrate to a second stage, which is operated as a stirred tank reactor. The two stages may be provided in a single tank with an internal wall separating a ring shaped outer portion from a cylindrical inner portion. The digester may be operated in a thermophilic temperature range.

Integrated systems and methods for onsite wastewater treatment in which a portion of onsite energy demands may be driven by energy harvested from the wastewater. Thermal energy of wastewater may be transferred from an onsite wastewater treatment system to an onsite heat pump to recover thermal energy, at least a portion of which may then be delivered to an onsite energy demand.

A system may be configured to use heat energy to produce power and potable water. The system may include an organic rankine cycle (ORC) subsystem configured to receive heat energy from one or more sources and convert that heat energy into usable power. The system may also include an air gap membrane distillation (AGMD) subsystem configured to receive heat energy from the ORC subsystem and use the heat energy to convert impure water into potable water.

A sludge treatment system, comprising a pump (1), an ozone generation device, an ejector (2) and pipe reactors (3). The pump (1), the ozone generation device, the ejector (2) and the pipe reactors (3) are sequentially connected by pipes. An oxygen generator (4) and an ozone machine (5) are arranged within the ozone generation device, and are connected by a pipe. The ozone generation device is used for providing ozone into the pipe reactors (3). The inner surfaces of the pipe reactors (3) are coated with a catalyst layer used for increasing the oxidative capacity of the ozone on the sludge. Spiral fin plates (6) allowing a fluid to generate a spiral flow are arranged within the pipe reactors (3). Also disclosed is a sludge treatment method using the present sludge treatment system. The present system has a high ozone utilization rate, and a low ozone input proportion.

A batch reactor includes a first portion, a second portion, a first drainage tank, a second drainage tank, and a first flow control mechanism. The first portion includes a first chamber, a second chamber, and a third chamber in fluid communication with one another configured for a flow of at least one biomaterial therethrough. The second portion includes a first chamber and a second chamber in fluid communication with one another configured for a flow of the least one biomaterial therethrough. The first drainage chamber is in fluid communication with the first and second chambers. The second drainage chamber is in fluid communication with the third chamber of the first portion and the second chamber of the second portion. The first flow control mechanism is disposed between the third chamber of the first portion and the first chamber of the second portion.

An apparatus and method for the distillation of ocean and brackish water that includes a means for using the ambient temperatures of seawater and air to continually transfer the heat energy, from the outer perimeters of the system, back into the, centrally located, evaporation chamber and insulation for preventing heat from escaping to the atmosphere. The insulation comprises a first and second wall surrounding the basic assemblies of a desalination system in which the space between the first and second wall is under low partial vacuum and is partially filled with an insulation material for structural support. The system provides a feed through means that prevent heat transfer through the structural connections between the first and second walls. The system provides an evaporation system for flash evaporation by atomizing the input contaminated water, preheated by the heat of condensation into very small liquid droplets, which are then sprayed into a stream of hot dry air. The liquid rapidly evaporates leaving behind hot dry solids that is recaptured and used to preheat the input contaminated water.

A unique method and ternary cycle process that captures heat from low temperature sources currently considered not commercially usable to produce electricity and desalinate water. In one cycle a novel flash tower operating at vacuum pressure causes a fraction of low temperature water to flash into steam. The steam passes to an indirect heat exchanger with a circulating refrigerating agent such as CO.sub.2, which condenses the steam on its outside surfaces to produce desalinated water product. The steam heat of condensation vaporizes the refrigerating agent, which is part of a binary refrigerate cycle that uniquely conditions it for turbine expansion to produce electricity in a connected electric generator.