A gas-liquid separation device (30) for an anaerobic purification device for purification of wastewater, the gas-liquid separation device comprising: a gas-liquid riser pipe (32); a separation pipe (34) attached to the gas-liquid riser pipe (32), the separation pipe defining an angle with the direction perpendicular to the gas-liquid riser pipe between 45 degrees and +45 degrees, the separation pipe (34) configured to receive fluid from the gas-liquid riser pipe (32); at least one pipe gas outlet (35) located, when assembled with an anaerobic purification device, in a surface along the separation pipe (34) facing away from the ground, the at least one pipe gas outlet (35) configured to lead at least a portion of the gas in the separation pipe (34) outside the gas-liquid separation device; a hydraulic cyclone (36) attached to the separation pipe (34), the hydraulic cyclone configured to receive fluid from the separation pipe; at least one cyclone gas outlet (37) located in the upper side of the hydraulic cyclone (36); the at least one cyclone gas outlet configured to lead the gas entering the hydraulic cyclone (36) outside the hydraulic cyclone; and a liquid outlet (38) attached to the bottom part of the hydraulic cyclone (36), the liquid outlet configured to guide degassed fluid outside the hydraulic cyclone.

A method for retaining ammonia nitrogen and removing antibiotics in biological treatment of livestock wastewater is provided. A nitrification inhibitor is added into an aerobic bioreactor with a sludge age greater than or equal to 30 days to inhibit the activity of nitrifying bacteria. The nitrification inhibitor is preferably 2-chloro-6-(trichloromethyl)pyridine or allylthiourea. By adding a chemical agent capable of inhibiting the activity of nitrifying bacteria into the aerobic biological treatment unit for treating livestock and poultry farming wastewater, the occurrence of ammonia nitrogen nitrification is inhibited without sacrificing the degradation of COD and antibiotics by heterotrophic bacteria, so that the aims of retaining ammonia nitrogen while removing antibiotics are realized.

A method for nitrate removal from drinking water. The method includes adapting a sludge including hydrogenotrophic denitrifiers (HTDs) by dominating the HTDs in the sludge, cultivating a microalgae biomass, forming a microalgae-HTD biomass by cultivating a mixture of the adapted sludge and the cultivated microalgae biomass, nucleating a plurality of microalgae-HTD granules by cultivating the formed microalgae-HTD biomass in a sequencing batch (SB) mood with a constant HRT, growing the plurality of microalgae-HTD granules by cultivating the nucleated plurality of microalgae-HTD granules in an up flow (UF) mood with a reducing HRT, and continuous nitrate removal from nitrate-contaminated water with a minimum HRT over the grown plurality of microalgae-HTD granules.

The present invention relates to an anaerobic formation of granules for waste water treatment. More particularly, the present invention relates to the use and development of microbial consortia for stimulation of anaerobic digestion of organic matter and to a method for enhancing the granulation rate of suspended anaerobic sludge using carbohydrate rich industrial effluent.

An anaerobic purification device for purification of wastewater, the anaerobic purification device comprising: a reactor tank (10) configured to, when in operation, have a sludge blanket formed at the bottom part; a fluid inlet (12) for, in operation, introducing influent into the reactor tank, the fluid inlet located in the lower section of the reactor tank (10); at least one gas-collecting system (13); at least one gas-liquid separation device (30); at least one riser pipe (22) connected to the at least one gas-collecting system (13) and discharging into the gas-liquid separation device (30); a downer pipe (24) connected to the gas-liquid separation device (30) and discharging into the bottom of the reactor tank (10); and a fluid outlet (16) comprising means for, in operation, varying the height of the fluid level (19) in the reactor tank within a predetermined range, the fluid outlet arranged at the upper section of the reactor tank (10);
wherein the fluid level control means comprises: a fluid valve (15) configured to control the height of the fluid in the reactor tank within the predetermined range, a fluid level detector (17), a gas flow meter (33) configured to measure the production rate of gas in the anaerobic purification device, and
a controlling unit configured to regulate the fluid valve (15) to vary the height of the fluid level in the reactor tank (10) based on at least one of the fluid level detected by the fluid level detector (17) and the gas production rate detected by the gas flow meter (33).

A disclosed piping manifold for providing pulsating flow includes an outer tubular member extending along a longitudinal axis. The outer tubular member includes a plurality of outer radial openings. An inner tubular member is positionable within the outer tubular member and rotatable about the longitudinal axis. The inner tubular member includes a plurality of inner radial openings, an inlet port configured to receive a fluid, and a lumen providing a fluidic pathway between the plurality of inner radial openings and the inlet port. Rotation of the inner tubular member about the longitudinal axis is configured to periodically bring the plurality of inner radial openings in and out of registration with the plurality of outer radial openings to provide a plurality of pulsating flows of the fluid out of the outer radial openings.

An anaerobic reactor (1) for treating waste water includes a reaction vessel (2) and a three phase separator (4) above the reaction vessel and arranged to receive effluent from the reaction vessel. The three phase separator includes an outer wall (10, 14) connected at its bottom to the top of the reaction vessel and a liquid outlet (42), a lid (16) closing the top of the outer wall. The lid has a gas outlet (17) above the level of the liquid outlet. The three phase separator also includes a funnel (18) arranged above the reaction vessel, a guide wall (30) spaced from and arranged radially outward of the funnel so to surround an upper aperture of the funnel and a baffle wall (36) spaced from and arranged between the guide wall and the liquid outlet.

A method, and an installation thereof, for recovering phosphorus from sludge to be treated, said method including: a stage of pre-acidification of said sludge to be treated including a step of adding an acid, preferably carbon dioxide into said sludge to be treated; a stage of bio-acidification including a step of acidogenesis and carried out in a reactor having a hydraulic retention time comprised between 1 day to 8 days and, wherein the acidified sludge has a pH comprised between 3.5 to 5.5 ; and a stage of treatment including: a step of solid/liquid separation; and a step of recovery of phosphates in liquid phase by sorption and/or crystallization, giving a phosphorus depleted water.

A process for the treatment of wastewater is disclosed, which comprises (a) contacting the wastewater with fast settling sludge from step (c) in an anaerobic zone, obtaining a mixture of wastewater and sludge; (b) subjecting the mixture from step (a) and slow settling sludge from step (c) to an aerobic zone, obtaining a water and sludge mixture; (c) subjecting a first part of the mixture from step (b) to a sludge selection step, wherein sludge is selected based on settling velocity and a first portion containing slow settling sludge and a second portion containing fast settling sludge are collected, wherein average settling velocity of the fast settling sludge is greater than that of the slow settling sludge, and wherein the first portion is returned to step (b) and the second portion is returned to step (a); and (d) separating sludge from a second part of the mixture from step (b).

An anaerobic reactor system that includes at least one toxicity reduction system that is configured for reducing an amount of one or more nitrogen compound and/or at least one type of recalcitrant in a substrate mixture sufficient to procedure a non-toxic substrate mixture for purposes of anaerobic digestion of the non-toxic substrate.