Device and method for quickly domesticating and enriching phosphorus-accumulating bacteria by short-cut denitrification
A denitrifying phosphorus-accumulating bacteria and enrichment technology, which is applied in chemical instruments and methods, multi-stage water treatment, water/sludge/sewage treatment, etc., can solve the problem of not meeting the requirements of rapid domestication and enrichment of bacteria, time-consuming, etc. problems, to achieve the effects of reducing the time of domestication and enrichment, increasing the quantity of enrichment, and enhancing the ability of absorption and utilization
Pending Publication Date: 2017-08-18
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology
The domestication and enrichment of short-range denitrifying phosphorus-accumulating bacteria is the key to the development of short-range denitrification phosphorus removal technology, but the traditional direct continuous culture method takes a relatively long time and cannot meet the requirements of rapid domestication and enrichment of bacteria.
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Embodiment 1
[0092] The test water quality is as follows:
[0093] 1~14d, COD=230mg / L, PO 3 - -P=10mg / L,
[0094] 15~32d, COD=230mg / L, PO 3 - -P=10mg / L;N0 2 - -N dosing gradually increased from the initial concentration of 10mg / L to 25mg / L;
[0095] 33~42d, COD=180mg / L, PO3 - -P=10mg / L;N0 2 - -N=25mg / L;
[0096] When the test is running, the ambient temperature is 20-22°C, and the dissolved oxygen concentration is controlled to be less than 0.1mg / L in the anaerobic stage; the dissolved oxygen concentration is controlled to be greater than 2.0mg / L in the aerobic stage; the oxidation-reduction potential is controlled to be -100~- in the anoxic stage 40mv.
[0097] The specific processing is as follows:
[0098] (1) Take the sludge from the secondary sedimentation tank of the sewage treatment plant as the inoculation sludge of the sequencing batch activated sludge process reactor, and the sludge concentration is 3200-3500mg / L.
[0099] (2) Acclimatization and enrichment stage of ...
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The invention discloses a device for quickly domesticating and enriching phosphorus-accumulating bacteria by short-cut denitrification. The device comprises an SBR reactor, a water inlet tank and a nitrite dosing tank, wherein the SBR reactor is made of two layers of organic glass, and the outer layer is connected with an electronic constant-temperature water-bath pot to form water-bath heat cycling so as to ensure that the system is in a constant temperature state; an electric stirrer is arranged at the upper part of the reactor, so that mud and water can be sufficiently mixed in the reacting process; a micro-porous aeration diffuser is arranged at the lower part of the reactor and is connected with a gas flow meter, and the aeration rate is controlled by a DO online monitor, so that dissolved oxygen is in an allowable range; and a pH online monitor ensures that the pH value of the system is in a proper allowable range, and can send out an alarm signal if the pH value of the system exceeds the setting range, and the pH value is regulated by adding acid liquor or alkali liquor into a peristaltic pump to ensure that the pH value of the system is in the allowable range. The device adopts automatic operation management, so that the labor intensity is greatly reduced, and the pollution control cost is saved. The device is simple in structure and convenient to move.
Description
technical field [0001] The invention relates to the fields of sewage treatment and environmental protection, and relates to a device and method for rapid acclimation and enrichment of short-range denitrifying phosphorus-accumulating bacteria that use nitrite nitrogen as an electron acceptor for nitrogen and phosphorus removal. Background technique [0002] At present, enhanced biologica1 phosphorus remova1 (EBPR) technology has attracted the attention of scholars because of its high efficiency, low cost and environmental friendliness. The main functional microorganism in this technology is Accumu1 ibacter. Under anaerobic conditions, intracellular polyphosphate is hydrolyzed to generate energy (adenosinetriphosphate, ATP) and reduced coenzyme NADH, which are used for the absorption of volatile fatty acids (VFA) and stored as poly-β-hydroxybutyrate (poly-β-hydroxybutyric acid). S-hydroxybutyrate, PHB); then under aerobic conditions, PHB was used as the electron donor and oxyg...
Claims
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Login to View More IPC IPC(8): C02F3/30
CPCC02F3/305C02F2301/08
Inventor 李微刘静孙慧智傅金祥高原
Owner SHENYANG JIANZHU UNIVERSITY