CN102329055A - Aquaculture sewage treatment method - Google Patents

Aquaculture sewage treatment method Download PDF

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Publication number
CN102329055A
CN102329055A CN201110265303A CN201110265303A CN102329055A CN 102329055 A CN102329055 A CN 102329055A CN 201110265303 A CN201110265303 A CN 201110265303A CN 201110265303 A CN201110265303 A CN 201110265303A CN 102329055 A CN102329055 A CN 102329055A
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China
Prior art keywords
sewage
treatment
flocculation
aquiculture sewerage
handled
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CN201110265303A
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陈强
黎中宝
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Jimei University
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Jimei University
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Priority to CN201110265303A priority Critical patent/CN102329055A/en
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Abstract

The invention discloses an aquaculture sewage treatment method, which specifically comprises the following steps of: firstly, feeding an microbial agent into sewage discharged from a culture pool, then introducing the sewage into a flocculation basin, and continuously feeding flocculants under the condition of continuous air aeration, wherein the hydraulic retention time is 15-30 minutes; and introducing the sewage subjected to air aeration and flocculation treatment into a membrane device under the action of a constant-flow pump to complete filter treatment, directly discharging permeated clear water or returning the permeated clear water to the culture pool for reutilization, and returning concentrated sewage to the flocculation basin for continuous treatment or directly discharging partial of the concentrated sewage. According to the aquaculture sewage treatment method, a biological treatment technology, a flocculation technology and a modern membrane filtration technology are organically combined, so that water quality is guaranteed, the production efficiency is increased, the production cost is greatly reduced, the advantages of simple process, stable system, small occupancy, low operation cost and the like are achieved, and bacteria and suspended matters in the sewage can be removed, and the purpose of safety recycling is achieved.

Description

A kind of aquiculture sewerage treatment process
Technical field
The present invention relates to sewage treatment area, specifically, relate to a kind of treatment process of aquiculture sewerage.
Background technology
China's aquaculture output occupies first of the world, world's aquaculture ultimate production 70% from China.Traditional aquatic products mode of supporting is not only fought for water resources with the mankind, and the particulate form thing that derives from ight soil and feed, The dissolved metabolic waste, The dissolved nutritive salt, anti-microbial agents and the drug residue etc. that are comprised in the aquaculture wastewater cause after being discharged in a large number and culture water and be close to waters eutrophication and serious water quality deterioration.In the face of the shortage of water resources and water surrounding resource, the growth pattern that must accelerate culture fishery changes, and the aquaculture pattern of seeking a kind of continuable " green " seems particularly important.With the aquaculture wastewater purification treatment technology is that the circulating water cultivation pattern of core is current one of modern aquaculture pattern of approval relatively in the world.Through suitable engineering means; Make aquiculture sewerage obtain sufficient recycle; Reduce environmental pollution; Get rid of environment and extraneous water pollution to culturing the interference and the influence of object, have low water usage amount, high-density, breeding production and do not receive regional climate restriction, resource utilization height, product high-quality and safety, few, the level of automation advantages of higher of disease, be a kind of low-carbon (LC), health, efficiently, the fish production pattern of lasting, environmental protection and coordinated development type.
The circulating water cultivation pattern has obtained widespread usage abroad.Since the seventies in 20th century, some countries as Japan, the U.S., Germany, Canada, Denmark etc. have successively carried out the research of circulating water cultivation water technology to some extent.At present, ozone, ultraviolet ray and water technology such as biological filter and facility are widely used in aquaculture abroad, and develop to mechanize, modernized direction.China starts late in this respect, and the eighties in last century, external circulating water cultivation facility and technology begin to get into China, but because high input and running cost, great majority are introduced facility and are are just laid aside and neglected very soon.China present most industrialized culture system facilities and equipment still is in lower level, and water processing establishment equipment famine, aquaculture wastewater be directly discharging still.
In view of this, the present invention organically combines biological treatment, flocculation technique and modern membrane filtration technique, and a kind of aquiculture sewerage treatment process is provided, and addressing the above problem, and realizes the circulating water cultivation pattern.
Summary of the invention
Present method of the present invention organically combines biological treatment, flocculation technique and modern membrane filtration technique, and a kind of new type purification method that is applied to aquiculture sewerage is provided, and overcomes the deficiency of prior art with this.
Design of the present invention is following:
Aquiculture sewerage has characteristics such as water yield fluctuation is big, change of water quality is big, pollution level is light, pollutant kind is few, the biological process oxygen-consumption is low.It is different with the conventional drinking water treatment that with removal turbidity, colourity and pathogenic micro-organism is purpose that aquaculture wastewater is handled; Also different with complicated component, concentration height and bio-refractory material Industrial Wastewater Treatment how, be more suitable for adopting the integrated method of simple biology, chemistry and physics to handle.Usually the aquaculture wastewater process object mainly includes machine thing (BOD 5, COD), ammonia nitrogen, nitrite nitrogen, total nitrogen, reactive phosphate, suspended solids and pathogenic bacteria etc.Be difficult to get rid of pollutent through the simple physics deposition, simple biological treatment can be removed organism, but not good to the removal effect of nutritive salt.And be that physical sedimentation or biological treatment all can't be removed suspended solids and pathogenic bacteria fully.Prior art has adopted enhanced biological processing, filtration treatment and some disinfections to handle in order to remove above-mentioned pollutent, has increased equipment input and running cost, is difficult to apply.To the characteristics of aquiculture sewerage, it is a kind of new water technology that the present invention handles organic integration to simple biological treatment (only need add microbial preparation one time), flocculation treatment, membrane filtration, reduced investment, and effective, processing costs is lower.The present invention both had been fit to handle continuously, also was fit to discontinuity treatment, and was easy to utilize.
To achieve these goals, solution of the present invention is following:
A kind of aquiculture sewerage treatment process comprises the steps:
(1) adds microbial preparation: the disposable microbial preparation that adds in aquiculture sewerage;
(2) flocculation agent flocculation treatment: again sewage is incorporated in the flocculation basin, in flocculation basin, adds flocculation agent continuously;
(3) air aeration is handled: when adding flocculation agent, with air sewage is continued aeration and handle, the residence time of sewage in flocculation basin is 10~30 minutes;
(4) membrane filtration is handled: sewage is handled through membrane filtration again, accomplishes solid-liquid separation; Separate seeing through primary water, and produce concentrated sewage;
(5) sewage backflow is handled: the concentrated sewage backflow of generation continues to handle in flocculation basin;
In the above-mentioned steps (1), said microbial preparation is photosynthetic bacterium, subtilis or both mixing;
In the above-mentioned steps (2), said flocculation agent is chitosan, aluminium iron polychloride or both mixing.The concentration of said flocculant concentration in sewage is 10~250mg/L;
In the above-mentioned steps (4), described film is microfiltration membrane or ultra-filtration membrane.
Compared with prior art, the present invention has following beneficial effect:
(1) in interpolation microbial preparation step of the present invention, add microbial preparation only need be when handling beginning disposable adding in the aquiculture sewerage.This is because in subsequent processes; Because the crown_interception of film, mikrobe can be accompanied by concentrated sewage and be utilized times without number, just the entire treatment process does not need to add microbial preparation again; Be disposable operation, can improve the utilising efficiency of microbial preparation greatly;
(2) in the present invention, sewage be continuous blow-down to flocculation basin, the process that is to say water treatment is (certainly present method be applicable to the discontinuity water treatment too) that can carry out continuously.Flocculation agent flocculation treatment step and membrane filtration treatment step are accompanied by sewage treatment process to be continued to carry out, thereby can realize the continuous processing of sewage;
(3) in the air aeration treatment step, continue to carry out air aeration in the flocculation treatment process and handle, providing biochemical treatment required oxygen, and can make the part ammonia nitrogen effusion water surface.Thereby improved the effect of biological treatment of sewage greatly.Therefore, the advantage of air aeration processing is: one, stirring is provided; Two, provide microbiological treatment needed oxygen;
(4) in the membrane filtration treatment step, the advantage that adopts membrane filtration to handle is: one, accomplish the separation of pollutent, guarantee that water outlet does not contain pathogenic bacteria etc., need not to increase in addition sterilizing unit; Two, guarantee not running off of microbial preparation, can use repeatedly.In this step, the primary water that sees through directly discharges or returns the breed pond and reuses, thereby has realized recycling of water resources;
(5) in the sewage backflow treatment step, can the concentrated sewage that contain effective mikrobe be turned back to again and continue in the flocculation basin to handle.
Sewage water treatment method of the present invention organically combines biological treatment, flocculation technique and modern membrane filtration technique, and treatment scheme is handled integrated by air aeration processing, flocculation agent flocculation treatment and membrane filtration.Promptly guaranteed water quality, improved production efficiency again, greatly reduced production cost, had advantages such as technology is simple, system stability, occupation of land is little, working cost is low, and can remove bacterium and the suspended substance in the sewage, thereby reach the purpose of safe reuse.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description, but accompanying drawing and embodiment to should not be construed as be the qualification that the present invention is carried out.
Fig. 1 is the process flow sheet of aquiculture sewerage treatment process of the present invention.
Embodiment
The concrete processing technological flow of aquiculture sewerage treatment process of the present invention is narrated as follows:
(1) adds microbial preparation: the disposable microbial preparation (dosage depends on the influent quality situation) that adds in aquiculture sewerage;
(2) flocculation agent flocculation treatment: again sewage is incorporated in the flocculation basin, in flocculation basin, adds flocculation agent (dosage depends on the influent quality situation) continuously;
(3) air aeration is handled: when adding flocculation agent, with air sewage is continued aeration and handle, the residence time of sewage in flocculation basin is 10~30 minutes;
(4) membrane filtration is handled: sewage is handled through membrane filtration again, accomplishes solid-liquid separation; Separate seeing through primary water, and produce concentrated sewage;
(5) sewage backflow is handled: the concentrated sewage backflow of generation continues to handle in flocculation basin.
Treatment process proposed by the invention can be narrated through following examples particularly:
Embodiment 1:
The concrete processing technological flow of aquiculture sewerage treatment process of the present invention is: add photosynthetic bacterium earlier, accomplish the startup of mikrobe; Adopting chitosan (CTS) again is flocculation agent, and dosage is 100mg/L sewage (m/v), and aquiculture sewerage is 20 minutes at the hydraulic detention time of flocculation basin, adopts micro-filtrate membrane filtration.
Sewage to before and after handling through present method is analyzed, is calculated, and draws pollutants removal rate.Record the water treatment effect: the COD clearance is 50%~65%, and the suspended solids clearance is 90%~95%, and ammonia nitrogen removal frank is 50%~55%, and the nitrite nitrogen removal efficiency is 70%~80%, and the reactive phosphate clearance is 45%~55%.The calculation formula of pollutants removal rate is: , as follows.
Embodiment 2:
The concrete processing technological flow of aquiculture sewerage treatment process of the present invention is: add subtilis earlier, accomplish the startup of mikrobe.Adopting aluminium iron polychloride (PAFC) again is flocculation agent, and dosage is 30mg/L sewage (m/v),, aquiculture sewerage is 15min at the hydraulic detention time of flocculation basin, adopting the molecular weight that dams is 5000 ultrafiltration membrance filter.Record the water treatment effect: the COD clearance is 60%~70%, and the suspended solids clearance is 95%~100%, and ammonia nitrogen removal frank is 55%~65%, and the nitrite nitrogen removal efficiency is 75%~85%, and the reactive phosphate clearance is 50%~60%.
Embodiment 3:
The concrete processing technological flow of aquiculture sewerage treatment process of the present invention is: add photosynthetic bacterium and subtilis earlier, accomplish the startup of mikrobe.Adopting aluminium iron polychloride (PAFC) and chitosan (CTS) again is flocculation agent; The concentration that adds in sewage is: PAFC 30mg/L sewage (m/v); CTS 15mg/L sewage (m/v); Aquiculture sewerage is 30min at the hydraulic detention time of flocculation basin, and adopting the molecular weight that dams is 5000 ultrafiltration membrance filter.Record the water treatment effect: the COD clearance is 65%~75%, and the suspended solids clearance is 95%~100%, and ammonia nitrogen removal frank is 60%~70%, and the nitrite nitrogen removal efficiency is 80%~90%, and the reactive phosphate clearance is 55%~65%.
Can find out that through the foregoing description method of the present invention organically combines biological treatment, flocculation technique and modern membrane filtration technique, treatment scheme is handled integrated by air aeration processing, flocculation agent flocculation treatment and membrane filtration.Promptly guarantee water quality, improved production efficiency again, greatly reduced production cost, had advantages such as technology is simple, system stability, occupation of land is little, working cost is low, and can remove bacterium and the suspended substance in the sewage, reached the purpose of safe reuse.
The variation that is appreciated that a lot of details is possible, but therefore this do not run counter to scope of the present invention and spirit, and the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the category of patent of the present invention to its suitable variation of doing.

Claims (5)

1. an aquiculture sewerage treatment process is characterized in that comprising the steps:
(1) adds microbial preparation: the disposable microbial preparation that adds in aquiculture sewerage;
(2) flocculation agent flocculation treatment: again sewage is incorporated in the flocculation basin, in flocculation basin, adds flocculation agent continuously;
(3) air aeration is handled: when adding flocculation agent, with air sewage is continued aeration and handle, the residence time of sewage in flocculation basin is 10~30 minutes;
(4) membrane filtration is handled: sewage is handled through membrane filtration again, accomplishes solid-liquid separation; Separate seeing through primary water, and produce concentrated sewage;
(5) sewage backflow is handled: the concentrated sewage of generation is back to and continues in the flocculation basin to handle.
2. a kind of aquiculture sewerage treatment process according to claim 1 is characterized in that: in the step (1), said microbial preparation is photosynthetic bacterium, subtilis or both mixing.
3. a kind of aquiculture sewerage treatment process according to claim 1 is characterized in that: in the step (2), said flocculation agent is chitosan, aluminium iron polychloride or both mixing.
4. a kind of aquiculture sewerage treatment process according to claim 1 is characterized in that: in the step (2), the concentration of said flocculant concentration in sewage is 10~250mg/L.
5. a kind of aquiculture sewerage treatment process according to claim 1 is characterized in that: in the step (4), described film is microfiltration membrane or ultra-filtration membrane.
CN201110265303A 2011-09-08 2011-09-08 Aquaculture sewage treatment method Pending CN102329055A (en)

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN102897879A (en) * 2012-09-26 2013-01-30 暨南大学 Inorganic-organic composite flocculant, preparation method and application thereof
CN103496819A (en) * 2013-09-18 2014-01-08 苏州市阳澄湖现代农业产业园特种水产养殖有限公司 Method for sterilization treatment on aquaculture wastewater
CN103496820A (en) * 2013-09-18 2014-01-08 苏州市阳澄湖现代农业产业园特种水产养殖有限公司 Aquaculture sewage treating method
CN103910467A (en) * 2014-05-14 2014-07-09 苏州市阳澄湖现代农业产业园特种水产养殖有限公司 Method for processing aquatic product culture waste water
CN104193001A (en) * 2014-09-19 2014-12-10 盐城工学院 Aquaculture substrate modifier and preparation method thereof
CN105668941A (en) * 2016-04-01 2016-06-15 浙江东洋环境工程有限公司 Circulating plant and method for young shrimp culture water
CN106172220A (en) * 2016-07-27 2016-12-07 广西陆川县润润养殖有限公司 A kind of cultural method hybridizing BaMa miniature pig
CN107162325A (en) * 2017-06-01 2017-09-15 中国水产科学研究院长江水产研究所 A kind of processing method for cultivating raw water
CN107364999A (en) * 2017-08-09 2017-11-21 过蕊 A kind of organic waste-water treating apparatus
CN107963744A (en) * 2017-11-22 2018-04-27 苏州赛比膜分离科技有限公司 A kind of sewage treatment process
US10034461B2 (en) 2015-05-21 2018-07-31 Atlantic Sapphire IP, L.L.C. Systems and methods of intensive recirculating aquaculture
US10959411B2 (en) 2018-01-04 2021-03-30 Atlantic Sapphire IP, L.L.C. Bottom grading apparatuses for aquaculture systems

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102897879B (en) * 2012-09-26 2013-11-06 暨南大学 Inorganic-organic composite flocculant, preparation method and application thereof
CN102897879A (en) * 2012-09-26 2013-01-30 暨南大学 Inorganic-organic composite flocculant, preparation method and application thereof
CN103496819A (en) * 2013-09-18 2014-01-08 苏州市阳澄湖现代农业产业园特种水产养殖有限公司 Method for sterilization treatment on aquaculture wastewater
CN103496820A (en) * 2013-09-18 2014-01-08 苏州市阳澄湖现代农业产业园特种水产养殖有限公司 Aquaculture sewage treating method
CN103910467A (en) * 2014-05-14 2014-07-09 苏州市阳澄湖现代农业产业园特种水产养殖有限公司 Method for processing aquatic product culture waste water
CN104193001A (en) * 2014-09-19 2014-12-10 盐城工学院 Aquaculture substrate modifier and preparation method thereof
US10034461B2 (en) 2015-05-21 2018-07-31 Atlantic Sapphire IP, L.L.C. Systems and methods of intensive recirculating aquaculture
US10694722B1 (en) 2015-05-21 2020-06-30 Atlantic Sapphire IP, L.L.C. Systems and methods of intensive recirculating aquaculture
CN105668941A (en) * 2016-04-01 2016-06-15 浙江东洋环境工程有限公司 Circulating plant and method for young shrimp culture water
CN105668941B (en) * 2016-04-01 2018-11-06 浙江东洋环境工程有限公司 A kind of recycle unit and round-robin method of shrimp seed rearing water
CN106172220A (en) * 2016-07-27 2016-12-07 广西陆川县润润养殖有限公司 A kind of cultural method hybridizing BaMa miniature pig
CN107162325A (en) * 2017-06-01 2017-09-15 中国水产科学研究院长江水产研究所 A kind of processing method for cultivating raw water
CN107364999A (en) * 2017-08-09 2017-11-21 过蕊 A kind of organic waste-water treating apparatus
CN107963744A (en) * 2017-11-22 2018-04-27 苏州赛比膜分离科技有限公司 A kind of sewage treatment process
US10959411B2 (en) 2018-01-04 2021-03-30 Atlantic Sapphire IP, L.L.C. Bottom grading apparatuses for aquaculture systems

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