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Biofilm treatment method for aquaculture wastewater

A technology for aquaculture wastewater and membrane treatment, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult treatment, save sludge return system, prolong The effect of sludge age and concentration increase

Active Publication Date: 2016-05-18
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency biochemical film treatment method for aquaculture wastewater, aiming at the problems that the aquaculture wastewater is difficult to treat due to the high concentration of COD and ammonia nitrogen.

Method used

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  • Biofilm treatment method for aquaculture wastewater

Examples

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Embodiment 1

[0018] see figure 1 , the embodiment of the present invention includes the following steps:

[0019] 1) After the raw water is regulated by the regulating tank, it first enters the coagulation tank 2 through the wastewater pump 1 for dosing coagulation pretreatment, and the pretreated aquaculture wastewater enters the air flotation tank 3 for air flotation treatment. The water pump 4 enters the anaerobic tank 5 of the biological treatment system; the coagulation pretreatment time can be 10-120 min; the microbubble diameter of the air flotation tank can be 10-1000 μm; the air flotation treatment time can be 10-120 min ; The membrane module made of industrial filter cloth or absorbent filler is placed in the anaerobic tank, and the industrial filter cloth can be selected from at least one of polyester staple fiber, polyester long fiber, vinylon, polypropylene fiber, etc., the Adsorptive fillers can be selected from at least one of zeolite, quartz sand, etc.; the pore size of th...

Embodiment 2 and 3

[0026] The specific steps are similar to those in Example 1, the difference is only in the influent COD concentration, influent ammonia nitrogen concentration, coagulation time, air flotation time, internal circulation reflux ratio and external circulation reflux ratio, and the treatment effect of the biochemical membrane treatment process for aquaculture wastewater is shown in the table 1.

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Abstract

A biochemical film treating method for cultivation wastewater relates to cultivation wastewater treatment, and comprises the following steps: 1), raw cultivation wastewater enters a flocculating tank first after being adjusted in an adjusting tank for pre-treatment such as chemical feeding and coagulation, pre-treated cultivation wastewater enters a floatation tank for floatation treatment, and then wastewater treated with floatation treatment enters an anaerobic tank of a biological treatment system; 2), wastewater in the anaerobic pool is pumped to an aerobic tank through a water outlet of a film component by a constant flow pump, while wastewater in the aerobic tank is pumped back to the anaerobic tank through a water outlet of another film component by the constant flow pump, so that continuous internal circulation treatment of wastewater in the anaerobic tank and the aerobic tank is realized in the aspects of time and space; during treatment, wastewater in the aerobic tank is pumped back to the adjusting tank by the constant flow pump to realize external circulation. Through external circulation, pimpled micelles in water can be degraded fully, so that output water can reach emission standards. The treating method has the advantages that the occupied area of required equipment is small; the investment is low; the equipment is simple; the operation is easy; the treating effect is high.

Description

technical field [0001] The invention relates to the treatment of aquaculture wastewater, in particular to a biochemical membrane treatment method for aquaculture wastewater. Background technique [0002] The existing aquaculture wastewater treatment generally adopts multi-stage and multi-stage sewage biological treatment technology, which generally has the disadvantages of large area, high investment cost, complicated equipment, difficult operation, and poor treatment effect. Due to the problems of COD and high ammonia nitrogen concentration in the aquaculture wastewater, the treatment of the aquaculture wastewater is more difficult. [0003] Chinese patent CN103466882A discloses a livestock and poultry breeding wastewater treatment process, which includes the following steps: the water in the septic tank enters the artificial grid to filter out impurities, and then enters the adjustment tank; the wastewater in the adjustment tank is lifted by the lift pump into the vortex c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 王海涛李清彪王远鹏何宁
Owner XIAMEN UNIV
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