摘要:
The present invention can feed substrates without waste to generate seed sludge with high bacterial cell concentrations and can start up operation within a short time, in cultivating anaerobic ammonium oxidizing bacteria with ammonium and nitrite as substrates. Equipment for cultivating anaerobic ammonium-oxidizing bacteria, which cultivates, in a cultivation tank, novel anaerobic ammonium-oxidizing bacteria that anaerobically denitrify nitrite and ammonium used as substrates, comprises an ammonium feed device which feeds ammonium at a given concentration into the cultivation tank, a nitrite feed device which feeds nitrite at a given concentration into the cultivation tank, and a control device which controls a feed rate Y of the substrate.
摘要:
A wastewater treatment method for treating wastewater containing ammonium nitrogen, includes the steps of: charging an unacclimated denitrification carrier containing anaerobic ammonium-oxidizing bacteria into a treatment tank; charging an unacclimated nitrification carrier containing nitrifying bacteria into the treatment tank; acclimating the unacclimated denitrification carrier in the treatment tank under an anaerobic condition; acclimating the unacclimated nitrification carrier in the treatment tank under an aerobic condition, after having acclimated the denitrification carrier; nitriting the ammonium nitrogen in the wastewater to generate nitrite with the acclimated nitrification carrier; and denitrifying the nitrite generated by nitriting the ammonium nitrogen with the acclimated denitrification carrier, while using the ammonium nitrogen in the wastewater as a hydrogen donor.
摘要:
The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.
摘要:
A method for collecting bacterial cells comprising the steps of: feeding water to be treated containing ammonium and nitrite to an anaerobic ammonium oxidation vessel to denitrify ammonium and nitrite by anaerobic ammonium oxidizing bacteria; and feeding the denitrified treated water to an acclimatization vessel or returning the water through the acclimatization vessel to the anaerobic ammonium oxidation vessel to collect anaerobic ammonium oxidizing bacteria in the treated water as immobilized microorganisms attached to an immobilizing material in the acclimatization vessel.
摘要:
The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.
摘要:
The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.
摘要:
The method for treating an ammonium-containing liquid which biologically denitrifies ammonium contained in the ammonium-containing liquid in an anaerobic atmosphere, the method comprises the steps of: bringing the ammonium-containing liquid into contact with anaerobic bacteria in a biological treatment tank, the anaerobic bacteria having an ability to biologically denitrify the ammonium in the anaerobic atmosphere; and adding nitrite to the biological treatment tank from a nitrite storage tank concurrently with the bringing step, the nitrite storage tank storing the nitrite with a certain concentration.
摘要:
A method for operating an anaerobic ammonium oxidation vessel in anaerobic ammonium oxidation in which ammonium and nitrite in water to be treated are simultaneously denitrified by anaerobic ammonium oxidizing bacteria, the method comprising the steps of: withdrawing a part of the anaerobic ammonium oxidizing bacteria from one anaerobic ammonium oxidation vessel in which the anaerobic ammonium oxidizing bacteria have been acclimatized, and introducing the withdrawn anaerobic ammonium oxidizing bacteria into another anaerobic ammonium oxidation vessel in which acclimatization is to be carried out to perform start-up operation, wherein the anaerobic ammonium oxidizing bacteria having been acclimatized in the one anaerobic ammonium oxidation vessel are provided as microbe-immobilized materials in which the bacteria are attached to and immobilized on immobilizing materials or entrapped and immobilized in immobilizing materials.
摘要:
A nitrification carrier having made nitrifying bacteria dominant therein and a denitrification carrier having made anaerobic ammonium-oxidizing bacteria dominant therein are mixed in a treatment tank. Both of a nitrification reaction with the nitrification carrier and a denitrification reaction with denitrification carrier are allowed to proceed in the treatment tank to decompose ammonium nitrogen in wastewater to nitrogen gas. The ratio of the bacterial loads of the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria can be easily controlled by immobilizing the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria on different carriers from each other (nitrification carrier and denitrification carrier) and by controlling the volume ratio (ratio of the feeding amounts) of the nitrification carrier and the denitrification carrier.
摘要:
A method for collecting bacterial cells includes feeding water containing ammonium and nitrite to an anaerobic ammonium oxidation vessel to denitrify ammonium and nitrite by anaerobic ammonium oxidizing bacteria provided in the anaerobic ammonium oxidation vessel to form denitrified water containing an amount of the anaerobic ammonium oxidizing bacteria and a sludge containing an amount of the anaerobic ammonium oxidizing bacteria; and feeding the denitrified water containing an amount of the anaerobic ammonium oxidizing bacteria and the sludge containing an amount of the anaerobic ammonium oxidizing bacteria to a precipitation vessel, in which an acclimatization container is stored, to cause the anaerobic ammonium oxidizing bacteria in the denitrified water to be attached to an immobilizing material in the acclimatization container, so that the anaerobic ammonium oxidizing bacteria in the denitrified water are collected, and, at the same time, to collect the anaerobic ammonium oxidizing bacteria of the sludge in a separated sludge by solid-liquid separation in the precipitation vessel.