Process for treatment of high density aquaculture sewage

A technology of aquaculture and process method, which is applied in the field of high-density aquaculture sewage treatment, can solve the problems of high investment and operation costs, and restrict the application and promotion of recirculating aquaculture mode, so as to reduce investment and operation costs, reduce organic load, The effect of easy operation and management

Inactive Publication Date: 2013-04-24
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Claims
  • Application Information

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Problems solved by technology

At present, the mainstream water purification methods of this model use a large amount of nitrogen and phosphorus substances in the water as pollutants, and use physical and biological water treatment technologies and methods to effecti

Method used

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  • Process for treatment of high density aquaculture sewage

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Example Embodiment

[0012] Example 1:

[0013] A process method for treating high-density aquaculture sewage, pumping high-density aquaculture sewage into the microbial flocculation reactor, adding activated and cultivated Bacillus subtilis seed bacterium liquid, the volume ratio of seed bacterium liquid to aquaculture sewage: 1 : 100; the bottom of the reactor is evenly equipped with an aeration device, the air-water ratio: 2: 1, dissolved oxygen: 2.2mg / L;

[0014] The high-density aquaculture sewage pumped into the microbial flocculation reactor is fully mixed with the suspended seed bacteria liquid put into it under the action of blast aeration to produce biological flocculants, decompose organic matter, and proliferate microorganisms. The mixing reaction time is 1 Hour;

[0015] The mixed liquid produced in the microbial flocculation reactor flows through the sedimentation-biological treatment reactor for solid-liquid separation and biochemical reaction;

[0016] The sedimentation-biologica...

Example Embodiment

[0019] Example 2:

[0020] A process method for treating high-density aquaculture sewage, pumping high-density aquaculture sewage into the microbial flocculation reactor, adding activated Bacillus subtilis seed bacteria liquid to it, the volume ratio of seed bacteria liquid to aquaculture sewage: 2 : 100; the bottom of the reactor is evenly equipped with an aeration device, the air-water ratio: 2.3: 1, dissolved oxygen: 2.5mg / L;

[0021] The high-density aquaculture sewage pumped into the microbial flocculation reactor is fully mixed with the suspended seed bacteria liquid put into it under the action of blast aeration to produce biological flocculants, decompose organic matter, and proliferate microorganisms. The mixing reaction time is 1.2 Hour;

[0022] The mixed liquid produced in the microbial flocculation reactor flows through the sedimentation-biological treatment reactor for solid-liquid separation and biochemical reaction;

[0023] The sedimentation-biological treat...

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Abstract

The invention relates to a process for treatment of high density aquaculture sewage. The process is characterized by: pumping high density aquaculture sewage into a microbial flocculation reactor, and adding a Bacillus subtilis seed bacterial solution subjected to activation culture, with the seed bacterial solution and the culture sewage being in a volume ratio of 1-3:100; disposing aeration equipment evenly at the bottom inside the reactor, and controlling the gas-water ratio at 2-2.5:1 and the dissolved oxygen at a concentration of 2-3mg/L; fully mixing the pumped sewage with the seed bacterial solution added therein for 0.8-1.2h under a blast aeration effect to produce biological flocculants decompose organic matters and proliferate microorganisms; leaving the mixed solution generated in the microbial flocculation reactor to flow through a sedimentation-biotreatment reactor, which relies on natural ventilation for oxygen supply and is filled with a suspending biological filter material at a filling rate of 25-30%; performing solid-liquid separation and biochemical reaction on the mixed solution in the sedimentation-biotreatment reactor; and subjecting the generated sediment, except for part of returned sludge, to centralized discharge, returning the sludge to the microbial flocculation reactor, and returning pure water to a culture pool.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a process method for treating high-density aquaculture sewage. Background technique [0002] my country is a large aquaculture country with limited resources and energy shortage. With the continuous expansion of intensive farming scale, metabolites produced by feeding, residual bait organic matter and ammonia nitrogen and other inorganic substances have become new sources of pollution. At the same time, the increasingly aging and polluted water environment has also restricted the further development of the aquaculture industry. The recirculating aquaculture model makes full use of advanced technologies and means to create a good living environment for fish, realize high-yield, high-efficiency production and zero discharge of aquaculture sewage, and greatly improve the utilization of land resources. It has become an inevitable trend for the sustainable develop...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/02
CPCY02W10/10
Inventor 杨菁管崇武王振华
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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