The invention relates to a process for separating off and/or recovering nitrogen compounds, in particular for separating off ammonia and/or recovering or producing nitrogen fertilizer, from a liquid or sludge substrate, in which a liquid or sludge substrate is introduced into a degassing vessel to which subatmospheric pressure is applied and ammonia gas formed is introduced by means of a vacuum pump into at least one scrubber which is located downstream of the degassing vessel and to which subatmospheric pressure is applied and into which acid is introduced, wherein the acid or an ammonium salt-containing liquid obtained in the at least one scrubber is taken off from the at least one scrubber, cooled and subsequently sprayed back into the at least one scrubber. The invention further relates to a plant for carrying out such a process.

The present invention relates to improving the results of anaerobic digestion of organic waste especially animal manure such as chicken manure by removing the grit in the waste by digesting the waste in a slurry at a temperature of about 50 C. or more for a period of time sufficient for the grit to settle out of the slurry.

A wastewater treatment system includes: an acid fermentation tank; a methane fermentation tank positioned under the acid fermentation tank, and configured to produce biogas, and an upper portion of the methane fermentation tank including an opening that communicates with the acid fermentation tank; and a gas type liquid partition valve provided at the opening, including a gas storage portion configured to store a predetermined amount of the biogas and discharge the biogas exceeding the predetermined amount to the acid fermentation tank, and configured to block the opening with the biogas stored in the gas storage portion.

Organic matter digesting apparatus and methods are provided that can include a digestion tank operatively coupled to a vertically aligned gas collection tower and methods that can include providing a biodigesting apparatus; inputting organic matter into the biodigesting apparatus; initiating the biodigesting apparatus; and outputting water, methane gas, and solid carbon-based material.

A method of treating wastewater comprising soluble chemical oxygen demand and particulate chemical oxygen demand is described as well as an apparatus therefor that is an anaerobic migrating blanket reactor apparatus (AMBR). The method provides an AMBR structure with wastewater influent inlet(s), biogas outlet(s) and effluent outlet(s). The AMBR structure defines at least three reaction chambers that are configured to permit bidirectional, generally transverse flow, in a first direction and a second direction, through the at least three reaction chambers. Wastewater influent enters the first reactor chamber and flows in a first direction through the first reactor chamber, the second reactor chamber, the third reactor chamber and through an effluent outlet for a first period of time. Wastewater influent enters the second reactor chamber and flows in the first direction through the second reactor, the third reactor and an effluent outlet for a second period of time. Wastewater enters the third reactor chamber of the AMBR and flows in a second direction through the third reactor chamber, the second reactor chamber, the first reactor chamber and an effluent outlet for a third period of time. Wastewater enters the inlet to the second reactor chamber and flows in the second direction through the second reactor, the first reactor and an effluent outlet for a fourth period of time. A mass load of the particulate chemical oxygen demand to the second reactor chamber (i) in the first direction of flow during the first and the second periods of time while the third reactor chamber acts as a clarifying chamber, and (ii) in the second direction of flow while the first reactor chamber acts as a clarifying chamber during the third and the fourth periods of time, allows for substantially complete digestion of biodegradable loads of the particulate chemical oxygen demand and the soluble chemical oxygen demand.

Systems and methods for the treatment of wastewater are provided. By incorporating one or more intermediate phosphate recovery reactors and manipulating the effluent and/or solid streams from those reactors, the systems and methods provide effluent and solid streams having customized phosphate content throughout the wastewater treatment process.

The invention relates to treatment of microorganisms from an activated sludge process operating with enhanced biological phosphorus removal in a reactor with baffles or other devices to induce similar plug-flow effort, designed to optimally release phosphorus and/or magnesium from the microorganisms with or without chemical addition. Further, the disclosure relates to a process designed to produce both a lower solids, phosphorus and magnesium enriched liquid stream and a higher solids, phosphorus and magnesium enriched stream. The reactor operates to give optimal performance by operating in a plug-flow mode.

The present disclosure relates to a novel process to control odors from manure by digesting the manure into Methane. Embodiments may comprise a two stage anaerobic digestion process to digest the wastes and remove the nutrients from the wastewater. The initial anaerobic digestion is carried out in a closed vessel to capture any gassed released and otherwise proceeds as current practices are. The wastewater from the first stage digestion is then pumped into a second reaction vessel. This vessel reproduces the conditions that produce natural gas (methane) in the geologic setting, with high temperatures and high pressures.

Organic matter digesting apparatus and methods are provided that can include a digestion tank operatively coupled to a vertically aligned gas collection tower and methods that can include providing a biodigesting apparatus; inputting organic matter into the biodigesting apparatus; initiating the biodigesting apparatus; and outputting water, methane gas, and solid carbon-based material.

Treatment of wastewater containing contaminants is provided. More specifically, treating wastewater through capture and recirculation of percolated fluid effluent through and from one or more infiltration field systems is provided.