Application method of low-carbon source urban sewage improvement UCT autotrophic nitrogen and phosphorus removal device

A technology for autotrophic denitrification of urban sewage, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of high energy consumption, large carbon emissions and uneconomical sewage treatment Saving and other issues, to achieve the effect of less sludge production

Active Publication Date: 2019-01-04
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, large carbon emissions, and uneconomical waste water treatment caused by the traditional urban sewage treatment plants usually adopting the operation mode of excessive aeration and excessive carbon source addition in order to achieve the effluent water quality standard , and provide low-carbon source urban sewage improved UCT autotrophic denitrification and phosphorus removal device and its application method

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  • Application method of low-carbon source urban sewage improvement UCT autotrophic nitrogen and phosphorus removal device

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specific Embodiment approach 1

[0032] Specific implementation mode one: combine figure 1 As shown, the UCT autotrophic denitrification and phosphorus removal device for low-carbon source urban sewage in this embodiment includes urban sewage raw water tank 1, anaerobic reactor 2, anoxic reactor 3, and the first short-range nitrification reaction connected in sequence Device 4, first stage anammox reactor 5, second stage short-cut nitrification reactor 6, second stage anaerobic ammonium oxidation reactor 7, sedimentation tank 8 and water outlet pipe 9;

[0033] The reactors are connected with silica gel tubes, and the flow of sewage is carried out by gravity flow; the urban sewage raw water tank 1 is provided with a water inlet pipe 22, an overflow pipe 23 and a vent pipe 24; The sewage raw water tank 1 and the anaerobic reactor 2 are connected by an inlet pump 11; the anaerobic reactor 2, the anoxic reactor 3, the first section of short-range nitrification reactor 4, and the first section of anaerobic ammoni...

specific Embodiment approach 2

[0034] Specific implementation mode 2: The application method of the low-carbon source urban sewage improvement UCT self-supporting denitrification and phosphorus removal device in this embodiment is carried out according to the following steps:

[0035] 1. Individual cultivation stage:

[0036] Inoculate the activated sludge from the secondary sedimentation tank of the urban sewage plant into two SBR sequencing batch reactors to make the sludge concentration 2500-3500mg / L, and quickly elutriate NOB in a real-time controlled manner to realize the short-range nitrification of urban sewage , after 30 days of stable operation, AOB was enriched;

[0037] Inoculate ordinary phosphorus removal sludge into two SBR sequencing batch reactors, the concentration of the inoculated sludge is 3000-4000mg / L, and gradually change the electron acceptor to cultivate DPAOs that can adapt to higher FNA concentrations;

[0038] Add sponge filler to two continuously running CSTR reactors, then ino...

specific Embodiment approach 3

[0044] Specific embodiment three: the difference between this embodiment and specific embodiment two is that in the step one, the activated sludge of the secondary sedimentation tank of the urban sewage plant is inoculated in two SBR sequencing batch reactors, so that the sludge concentration is 3000mg / L . Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention relates to a low-carbon-source municipal sewage improved UCT autotrophic denitrification dephosphorization device and an application method thereof, belonging to the technical field of sewage biological treatment. The device aims to solve the problems of high energy consumption, high carbon discharge amount and low economy. The device comprises a municipal sewage raw water tank, an anaerobic reactor, an anoxic reactor, a primary short-range nitration reactor, a primary anaerobic ammoxidation reactor, a secondary short-range nitration reactor, a secondary anaerobic ammoxidation reactor, a precipitation tank and a water outlet pipe. The method comprises the following steps: 1. separate culture stage; 2. starting stage; and 3. continuous operation. The device comprehensively utilizes the three functional bacteria for denitrification dephosphorization, short-range nitrification and anaerobic ammoxidation, and establishes a municipal sewage continuous-flow autotrophic denitrification technique. The device ensures the high efficiency and stability of the denitrification and dephosphorization of the system. The device saves the organic carbon source and aeration quantity, reduces the surplus sludge discharge amount, lowers the operation energy consumption and cost, and lowers the greenhouse gas discharge.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a simultaneous denitrification and phosphorus removal method for treating low-carbon source urban sewage by continuous-flow denitrification and phosphorus removal and short-range nitrification anammox technology. Background technique [0002] Global warming and environmental pollution are currently hot topics of international concern. For sewage biological treatment, while preventing nitrogen and phosphorus discharge from causing eutrophication of water bodies, how to save energy consumption and reduce greenhouse gas emissions has become a key issue that needs to be solved urgently for the development of the industry. Traditional wastewater biological denitrification processes are mostly based on aerobic nitrification and heterotrophic denitrification (typical representatives such as A / O, A 2 / O process). In the process of aerobic nitrification, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/30C02F3/307C02F3/308C02F2301/046
Inventor 彭永臻刘文龙王淑莹马琳娜
Owner HARBIN INST OF TECH
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