Disclosed is a process and a facility for recovering phosphorus present in an effluent to be treated, including the following steps: a step of biological removal of phosphorus from the effluent to be treated, a step of separating the treated water from step i and the sludge, a step of anaerobic hydrolysis of at least one portion of the sludge from step ii, a step of liquid/solid separation of the effluents from step iii, a step of advanced treatment of at least one portion of the sludge from step iv, a step of recirculation to step iii of at least one portion of the effluent from step v, and a step of recovering the phosphorus present in the effluent from step iv.

An organic wastewater treatment method that includes a raw sludge removal step, a raw sludge concentration step, a biological treatment step, an excess sludge separation step, an excess sludge concentration step, a sludge mixing step, and a methane fermentation treatment step. The treatment method further includes a sterilization step for heating and sterilizing the concentrated excess sludge upstream of the sludge mixing step. At least one among: (1) the temperature to which the concentrated excess sludge is heated during sterilization, (2) the concentration of concentrated raw sludge and/or the concentration of the concentrated excess sludge, and (3) the mixture ratio between the concentrated raw sludge and the concentrated excess sludge is adjusted according to the fluctuation in the amount of raw sludge generated and the amount of the excess sludge generated, and the temperature of the mixed sludge is controlled to a temperature suited for methane fermentation.

In a method for disintegrating organic substrates, an alkaline solution is added as pH-altering solution to the substrate and said substrate is then treated with steam, or steam is added, for heating to a temperature below 100 C. Under pressureless conditions, the heated substrate admixed with alkaline solution is subjected to a residence time. Preferably, the organic substrates are sludges from wastewater treatment plants.

The present disclosure relates to methods and systems for converting biomass into biofuels and biochemicals. In particular, the present disclosure relates to methods and systems for converting biomass comprising lignocellulosic material into biofuels and biochemicals, such as those comprising fatty acid esters, that contribute to reduction of greenhouse gas emissions.

The present invention provides a method and apparatus for dewatering a biological solid material employing both microwave irradiation and solvent extraction. The method comprises microwave irradiation pretreatment, solvent extraction dewatering, solid-liquid separation, and solvent recovery. Through microwave irradiation of an aqueous biological solid material, gaps in the solid material are increased, and the biological material is fractured, thus releasing more bound water in the solid material. Subsequently, the microwave-irradiated biological solid material is brought into full contact with an organic solvent, allowing the solvent to absorb and extract moisture from the solid, thus removing moisture from the solid. The aqueous solvent is then subjected to evaporation under reduced pressure or gasification under reduced pressure in a separation apparatus so as to separate the moisture and the solvent. The solvent is then compressed, condensed and recovered for recycling. Also provided is a device for implementing the dewatering method.

A wastewater treatment system includes a contact tank having a first inlet configured to receive wastewater to be treated, a second inlet configured to receive activated sludge, and an outlet, a dissolved air flotation unit having an inlet in fluid communication with the outlet of the contact tank, a biological treatment unit having a first inlet in fluid communication with an effluent outlet of the dissolved air flotation unit and an outlet, an anaerobic digester having an inlet and an outlet, a floated solids conduit providing fluid communication between the solids outlet of the dissolved air flotation unit and the inlet of the anaerobic digester, and a thickener having an inlet in fluid communication with the outlet of the anaerobic digester, a first outlet in fluid communication with the inlet of the anaerobic digester, and a second outlet.

The present invention relates to a method for the treatment of organic matter, in particular sewage sludge, where the organic matter is first fed to a disintegration system. The organic matter is then subjected to thermal hydrolysis in the disintegration system to form disintegrated matter. The disintegrated matter is fed to a digester in which the disintegrated matter is at least partially digested such that digested sludge is formed, where at least part of the digested sludge obtained is recirculated via a recirculation line to a point upstream of the disintegration system. The invention further relates to a device for the treatment of organic matter, in particular sewage sludge, comprising a disintegration system, a digester downstream thereof, and a recirculation line for at least partially digested disintegrated matter, said recirculation line extending from a point downstream of the digester to a point upstream of the thermal disintegration system.

The present invention discloses an emulsion-type water-based detergent for oily sludge, and a preparation method and use method thereof. The emulsion-type water-based detergent includes components in the following mass percentage contents: 2-10 parts of surfactant, 3-10 parts of oil-soluble component and the balance being aqueous phase, based on 100 parts by weight. The preparation method includes: stirring the surfactant, the oil-soluble component and the aqueous phase to mix uniformly to obtain a homogeneous and stable emulsion-type water-based detergent at room temperature. During use, the oily sludge is first mixed with the emulsion-type water-based detergent and stirred under a certain temperature; mixture is subjected to oil-water-solid three-phase separation after the washing is completed; and at last, solid phase is rinsed with hot water under the same temperature.

A waste separating system includes: a first waste separating apparatus 4 and a second waste separating apparatus 5 each configured to separate waste S from treatment target water W1, the first waste separating apparatus 4 including a first filter 41 with a first opening size, the second waste separating apparatus 5 including a second filter 51 with a second opening size larger than the first opening size and disposed downstream of the first waste separating apparatus 4.

Certain exemplary aspects of the present disclosure are directed towards an apparatus for electrostatic fluid filtration. The apparatus utilizing alternating positive and negative electrodes in conjunction with filter media there between to filter contaminants from a fluid flow.