A process and an associated facility for treating ammonium-containing wastewater are specified. Ammonium present in the wastewater is first oxidized to nitrite by use of aerobically oxidizing bacteria in an activation unit. Then ammonium and nitrite are reduced to elemental nitrogen anaerobically by use of ANAMMOX bacteria. Excess sludge arising in this operation is removed from the activation unit. ANAMMOX bacteria removed with the excess sludge are separated and returned to the activation unit. To facilitate the returning of the ANAMMOX bacteria, magnetic or magnetizable expanded glass particles are added, as colonization bodies for the ANAMMOX bacteria, to the wastewater in the activation unit. Expanded glass particles removed from the activation unit with the excess sludge are separated from the excess sludge magnetically and returned to the activation unit.

Provided are a granulation-promoting microcarrier for an anaerobic ammonium oxidation (Anammox) process, and a preparation and use method thereof. The granulation-promoting microcarrier for the Anammox process is prepared by mixing a functional component, a regulatory component, and a structural component; wherein the functional component is an iron-based material; the regulatory component is a phase-change material; and the structural component includes a framework material and a foaming agent.

The present disclosure relates to stormwater treatment systems for attracting and retaining anaerobic ammonia oxidizing (anammox) bacteria, and methods of treating stormwater including ammonia using such stormwater treatment systems. The anammox bacteria is on carriers including zeolite. Select carriers include zeolite, select carriers do not include zeolite, select carriers are pre-seeded with the anammox bacteria, and select carriers are not pre-seeded with the anammox bacteria. The carriers are installed in the stormwater treatment systems in positions capable of contacting with the stormwater. The stormwater has a variable flow rate, and the system is capable of maintaining anammox bacteria growth when not in contact with the stormwater.

The present disclosure belongs to the technical field of sludge treatment, and discloses a sludge and kitchen waste collaborative digestion process coupled with intermediate thermal hydrolysis. The collaborative digestion process includes: 1) screening and slurrying kitchen waste, and desanding and deslagging primary sludge; 2) mixing the kitchen waste and the primary sludge, and carrying out first-stage collaborative anaerobic digestion on the mixture; 3) mixing the first-stage collaborative anaerobic digestion product with residual activated sludge, and carrying out centrifugal dehydration; 4) carrying out thermal hydrolysis on the dehydrated sludge cake; 5) desanding the thermally-hydrolyzed sludge; 6) diluting the desanded thermally-hydrolyzed sludge followed by heat exchange; 7) carrying out second-stage anaerobic digestion; 8) carrying out plate-frame dehydration; 9) carrying out anaerobic ammonia oxidation on the filtrates; and 10) compounding sludge cake nutrients to produce organic nutrient soil. In the present disclosure, good complementarity of sludge and kitchen waste in terms of material properties is fully utilized, configuration of thermal hydrolysis is optimized, generation of non-degradable substances is reduced, and investment on thermal hydrolysis is reduced. A biogas yield and a biogas output are improved, and energy self-sufficiency of a sewage treatment plant is realized on the basis of a centralized treatment method of regional organic solid waste.

The system relates to a disk filter for effectively preventing scale formation in a water treatment process, and to a water treatment apparatus and method using the same. The disk filter includes a housing having a cylindrical shape, a raw water inlet formed at a predetermined position on the side surface of the housing, a raw water outlet formed at a central region in the bottom of the housing, a backwash water outlet formed at a central region in the top of the housing, a ceramic filter provided in a circular disk shape inside the housing, and a scale formation inhibitor loaded in a flow channel formed inside the ceramic filter, wherein raw water introduced via the raw water inlet passes through the ceramic filter and then through the flow channel filled with the scale formation inhibitor, and is then discharged via the raw water outlet.

A method for treating wastewater or sludge comprises the steps of adding the wastewater or sludge to a reactor and mixing the wastewater or sludge with a stream to thereby decrease a ratio of alkalinity to ammonium in the reactor, the reactor containing ammonium oxidising bacteria that oxidise ammonium to produce nitrite and decrease pH.

Processes and compositions for removal nitrogen, organic and inorganic contaminants from wastewater using Feammox bacterium are provided.

The present application provides a system and method for realizing partial anammox advanced nitrogen and phosphorus removal through mainstream and sidestream biofilm cyclic alternating for a municipal wastewater treatment plant. The system includes three main component units: a mainstream zone (a), an advanced treatment zone (b) and a side stream zone (c). Advanced nitrogen and phosphorus removal of the entire system is realized through cyclic alternating of biofilms. In the mainstream zone (a), the main function of an anaerobic/anoxic zone is to perform heterotrophic denitrification nitrogen removal, and partial denitrification/anammox autotrophic nitrogen removal, and the main function of an oxic zone is to remove organic matter, perform aerobic phosphorus uptake, and complete a nitrification reaction. In a denitrification fluidized bed (8) in the advanced treatment zone (b), advanced treatment is performed for a mixed solution of effluent and raw water in the mainstream zone to achieve heterotrophic denitrification, and partial denitrification/anammox autotrophic nitrogen removal. A high-ammonia nitrogen anammox nitrogen removal zone (7) in the sidestream zone (c) enriches anammox bacteria based on biofilms, realizing autotrophic nitrogen removal of sidestream high-ammonia nitrogen wastewater.

Method and device for treating coking wastewater through denitrification and anammox are provided. The device includes an anaerobic reactor, an anoxic reactor, a sedimentation tank, and an aerobic reactor sequentially communicated, and a coking wastewater tank communicated with the anaerobic reactor through an influent pump. The present disclosure promotes the formation of microgranular sludge in the device through a composite powder carrier, and promotes sulfur-based autotrophic denitrification in anaerobic and anoxic zones through pyrite in the composite powder carrier and an additional sulfur source, and promotes anammox in the anaerobic zone through NO.sub.2.sup.N produced by sulfur-based autotrophic denitrification in the anoxic zone. The present disclosure forms a dual-sludge system through the sedimentation tank to reduce reducing inorganic sulfur-containing substances that compete with nitrifying bacteria, and achieves nitrification in the aerobic zone while oxidizing ionic reducing inorganic sulfur-containing substances. The present disclosure discharges treated wastewater through a membrane component.

The present invention provides an aeration lateral system designated to be site specific for new septic disposal areas or retro fitting to existing septic disposal areas to break up the biological clogging slug mat at the interface of the wastewater and imported sand or native soil fill under or adjacent to disposal areas of a typical septic system. The lateral system provides uniform or other site specific distribution of fluids about the bio-mat of a wastewater disposal area, with lateral spacing and hole spacing varying based on the type of disposal area being utilized. The lateral system can also be utilized to provide continuous low volume air supply system to a wastewater disposal area or peat filter module. The air lateral installation includes methods to minimize airflow disturbance of the soil and methods to prevent air leakage.