Disclosed is a method for treating pulp, particularly a method for treating sludge from wastewater treatment plants, for producing energy and/or organic materials that have undergone hygienization, including at least the following steps: a step of aerated or non-aerated thermal hydrolysis of the pulp, a digestion step, a dehydration step and a step of recirculating part of the dehydrated pulp into the step of thermal hydrolysis.

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.

A thermophilic enzymatic biosynthesis (TEBS) device (50) produces outputs of newly synthesized substances, stabilized matter and fully recovered organic material, wherein the preferred device is a dry closet employing multistage treatment of organic solid, liquid and gaseous wastes. Said contemplated device comprises a multiphase thermophilic environment chamber (MTEC) (1) having a mixing zone (4), a cultivation zone (12), a pasteurization zone (24) and a germination zone (7) which utilizes a multiphase germination (62). The device comprises a thermodynamic pathway (29) and a functional respiration (64) which is directed toward an ammine reaction chamber (ARC) (3), which includes an oxidation surface (47) having reactivity with ammonia, producing a metal ammine complex. The device further comprises a subterranean uptake chamber (SUC) (2) which includes a plant growth medium (44) where gases received from the ARC (3) disperse to an uptake root structure (46), thereby reducing carbon dioxide emissions.

An amount of a first reactant, such as degradable wastes like stool and toilet paper from waste disposal systems, is provided as a liquid influent to a reactor. A gaseous influent stream providing a second reactant, e.g., air, is also provided for reaction with the first reactant. The reaction produces a solvent-laden gaseous effluent that is removed. The reactor can include a plurality of thermophilic bacteria with the influent stream of air configured to aerate the biomass and enable aerobic digestion of wastes. Solvent in the removed effluent, e.g., water, can then be condensed and isolated therefrom. Condensate isolated in this manner has been shown in achieve at least 28 mg/L chemical oxygen demand (COD) and 1.2 mg/L total suspended solids (TSS) from consumer human waste influent. The effluent can be recycled to achieve nearly the same rate of COD removal at greatly reduced power consumption.

A production process for producing biogas by means of anaerobic co-digestion which includes (a) preparing hydrolyzed biomass from organic solid waste by means of a thermal hydrolysis treatment of waste at between 1.5 and 4.5 bar and between 120 and 160? C., generating raw biomass from which foreign matter is separated, giving rise to clean hydrolyzed biomass with at least 90% organic matter, a volatile solids to total solids ratio of at least 0.6 and at least 5% total solids; (b) mixing the clean hydrolyzed biomass with sludge from a wastewater treatment plant (WWTP), generating a mixture with a concentration of solids of less than 30% which is conditioned to a concentration of less than 20%; and (c) a step of wet anaerobic digestion in a digester at between 25? C. and 40? C. or between 50? ? C. and 60? C. and during an HRT of between 12 and 30 days, generating biogas and a digestate.

Methods and systems are described for treating a fluid that includes a particulate fraction and a soluble fraction, such as wastewater fluid including biosolids. The treatment includes biochemically transforming solids in the particulate fraction of the fluid in a biochemical process while simultaneously subjecting the fluid to a vacuum pressure, and evaporating off at least a portion of the soluble fraction of the fluid and thereby thickening a remaining portion of the fluid. A residence time of the particulate fraction can be controlled to be at least 25% greater than a residence time of the soluble fraction, for example. A solids content of the particulate fraction can be controlled to be in a range of from 2% to 99%, for example.

Processes and system are provided for digesting biosolids in a multistage digestion system. The processes and system are well suited for producing Class A biosolids and biogas containing a high content of methane. Methods and systems are also provided for recovery of phosphorus from wastewater and biosolids.

Sewage sludge is treated to produce Class A (generally pathogen free) biosolids. Some or all of the sewage sludge is thickened or dewatered to 10 wt % dried solids and then fed to a thermophilic anaerobic digester. The thermophilic digester has multiple stages provided by way of a tank with at least one internal wall. Effluent from the thermophilic digester is treated further in a mesophilic anaerobic digester.

A waste treatment process utilizes a two-stage digestion process with a thermophilic digester, a heat exchanger, and a mesophilic digester. The pH of the thermophilic digestate is increased by removal of carbon dioxide with an air stripper, or by adding a pH increasing reagent upstream of the heat exchanger. The pH adjustment of the digestate protects the heat exchanger and downstream equipment and processes from struvite formation. A struvite reactor may be located in various locations downstream of the heat exchanger to produce a treated digestate or effluent that contains struvite, which can optionally be recovered for beneficial use.

A solid waste treatment method includes the steps of: degradation and sterilization via chlorination of the solid waste, stabilization of the solid waste and regeneration of biomass to reduce or eliminate solid waste. The solid waste treatment method may be utilized in agricultural, industrial or municipal settings.