The invention relates to processes and equipment for treatment of a feedstock by anaerobic organisms to produce a methane containing biogas that can be used as a source of energy. The invention is particularly concerned with producing methane from a waste plant material such as produced by fermentation processes used in the alcoholic beverages industry, such as from brewing/distilling processes which employ grain material for fermentation.

The present invention relates to a wastewater treatment apparatus for shortcut nitrogen removal using anaerobic ammonium oxidation (ANAMMOX) and partial nitritation using ammonium oxidizing bacteria (AOB) granules. High-purity AOB granules are formed by means of AOB predominance using a side stream generated during a sludge treatment process. Moreover, the formed AOB granules are supplied to a partial nitritation tank (130) of a main treatment process and thus the partial nitritation is efficiently performed and nitrogen is quickly removed, and thus oxygen and an organic material is reduced compared to an existing method.

Multiple embodiments are described for water and wastewater treatment using bio-ZVI to remove nitrate, nitrite, perchlorate, chlorinated organic compounds, nitroaromatic compounds, arsenic, selenium, phosphorus, etc. from water. ZVI may also provide an iron nutrient to enhance biological activity, and the oxidized ferric can serve as flocculent to improve sludge dewater characteristics.

A method for biologically treating nitrogen while minimizing energy and carbon source usage uses an aerobic tank, a first anoxic tank, and a second anoxic tank. The method includes introducing feed water by dividedly introducing the feed water to the aerobic tank and the first anoxic tank; converting ammonia nitrogen into nitrate nitrogen in the aerobic tank; converting the nitrate nitrogen into nitrite nitrogen through partial denitrification in the first anoxic tank using organic material contained in the feed water; and converting the nitrite nitrogen and ammonia into nitrogen gas in the second anoxic tank using an anammox microorganism. The ammonia nitrogen is converted by determining aeration intensity, aeration time, and/or aeration amount depending on an ammonia concentration in the aerobic tank. The nitrate nitrogen is converted by determining a reaction time of the first anoxic tank based on nitrate and nitrite concentrations in the first anoxic tank.

Provided are a polyhedral spherical denitrifying packing and a use method thereof. An outer surface of the polyhedral spherical denitrifying packing is composed of a plurality of conical pieces, and each of the conical pieces has a vacancy. The method for using the packing above includes: placing the polyhedral spherical denitrifying packing in packing area; adding inoculation sludge into the packing area, and forming biofilm; feeding raw sewage into the packing area through a water inlet of the denitrification reactor, subjecting the sewage to denitrification reaction when flowing through the packing area with the biofilm; refeeding a part of sewage discharged from the packing area into the packing area through the water inlet of the denitrification reactor via a circulating tube; making the other part of the sewage discharged from the packing area flow into clarification area, and discharging through a water outlet of the denitrification reactor.

Wastewater containing organic matter may be treated using a multi-zone apparatus. In a first zone, organic matter in the wastewater may, among other things, be converted to at least volatile fatty acids (VFAs) and, thereafter, a portion of the treated wastewater may flow to a second zone that may, among other things, convert the VFAs to methane.

Disclosed is a wastewater treatment process including at least one step of biological oxidation in a biological treatment unit, wherein ozone and an adsorbent compound are introduced, the ozonation and the adsorption each at least being induced upstream of the biological treatment unit, or else in the biological treatment unit, or else downstream of the biological treatment unit, knowing that downstream of the biological treatment unit at most either the introduction of ozone, or the introduction of the adsorbent compound is carried out. Also disclosed is a plant for implementing the process.

A modular and mobile unpressurized bioreactor for removing nitrate from water, and methods and systems thereof.

A wastewater treatment system includes a wastewater collection system, at least one aeration subsystem aerating the aerobic portion, and at least one filtration subsystem. The wastewater collection system has an anoxic portion, an aerobic portion downstream of the anoxic portion, an anaerobic portion downstream of the aerobic portion. The filtration subsystem includes at least one bioreacting filter receiving fluid from the aerobic portion, being operable to filter wastewater received from the aerobic portion, and discharging filtered fluid into the anoxic portion, an oxygen contactor fluidically connected between the aerobic portion and the at least one bioreacting filter and operable to diffuse oxygen into the fluid being supplied from the aerobic portion, and an oxygen supply operable to supply oxygen to the oxygen contactor.

This disclosure describes a biochemical reactor with tank inlet disposed above lower divider. The biochemical reactor may include a tank configured to house immobilized carriers and fluid. The biochemical reactor may include a circulation conduit at least partially disposed within the tank. The circulation conduit may include a circulation outlet opening. The biochemical reactor may include one or more vanes disposed proximate to the circulation outlet opening. The biochemical reactor may include a tank recirculation port disposed proximate to a second end. The biochemical reactor may include a tank inlet configured for feeding fluid into the tank. The biochemical reactor may include a tank outlet configured for drawing fluid from the tank. The tank outlet may be disposed proximate to a first end. The biochemical reactor may include a first divider and a second divider. The tank inlet may be disposed between the first divider and the second divider.