CN103496819A - Method for sterilization treatment on aquaculture wastewater - Google Patents
Method for sterilization treatment on aquaculture wastewater Download PDFInfo
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- CN103496819A CN103496819A CN201310426613.7A CN201310426613A CN103496819A CN 103496819 A CN103496819 A CN 103496819A CN 201310426613 A CN201310426613 A CN 201310426613A CN 103496819 A CN103496819 A CN 103496819A
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Abstract
The invention discloses a method for sterilization treatment on aquaculture wastewater. The method comprises the following steps: (1) carrying out sterilization treatment, namely, adjusting the pH value of the aquaculture wastewater to be 5.2-5.8, adding Fe2+ so as to adjust the concentration of Fe2+ in the aquaculture wastewater to be 0.06-0.08mol/L, further carrying out ozone treatment, controlling the flow of the ozone to be about 25mg/min, treating for 8-10 minutes so as to adjust the concentration of the ozone in the aquaculture wastewater to be 0.6-0.9mol/L; (2) adding a biological agent; (3) carrying out flocculation treatment; (4) carrying out aeration treatment; (5) carrying out separation treatment; and (6) carrying out wastewater recycling treatment. The wastewater sterilization treatment method disclosed by the invention is integrated by sterilization treatment, flocculation treatment, aeration treatment, separation treatment and wastewater recycling treatment, both the water quality is ensured, and the production efficiency is improved, and the production cost is greatly lowered; and in addition, the method is rapid in steps of sterilization treatment, efficient and small in toxicity.
Description
technical field:
The present invention relates to the germicidal treatment method, be specifically related to aquiculture waste water germicidal treatment method, belong to technical field of aquaculture.
background technology:
China is the aquaculture big country of a resource-constrained, energy scarcity.Along with the continuous expansion of intensive culture scale, being raised the inorganicss such as the metabolite of generation, residual bait organism and ammonia nitrogen by throwing has become new source of pollution, and while water surrounding day by day aging, that pollute has also restricted aquaculture and further developed.
The circulating water cultivation pattern, be widely used abroad.Since the 70's of 20th century, some countries as Japan, the U.S., Germany, Canada, Denmark etc., successively carried out the research of circulating water cultivation water technology to some extent.At present, ozone, ultraviolet ray and the water technology such as biological filter and facility are widely used in to aquaculture abroad, and to mechanize, modernization future development.
The abundant uses advanced technology of circulating water cultivation pattern and means, create the good living environment of fish, realizes high yield, high efficiency production and breeding wastewater zero release, and greatly improve the land resources utilization rate, becomes the inexorable trend of aquaculture Sustainable development.
At present its main flow water purification style of this pattern is all using nitrogen a large amount of in water body, phosphorus substance as pollutent, adopts the water technology such as physics, biology and means effectively to remove, thereby causes investment, running cost to remain high.China starts late in this respect, and in the 80's of last century, external circulating water cultivation facility and technology start to enter China, but, due to high input and running cost, great majority are introduced facility and just laid aside and neglected very soon.
In addition, in recent years, people recognize clear-headedly, to aquiculture waste water, can not regard as unimportant again.At present, the sterilizing method of aquiculture waste water mainly contains chlorination (liquid chlorine, clorox, chlorinated lime, dioxide peroxide etc.), ultraviolet sterilization and ozone disinfection both at home and abroad.These sterilizing methods have separately significantly limitation; In addition, nearly all cholorination agent all can with water in the gas chromatography effects such as soil ulmin, produce numerous carcinogenic, teratogenesis, mutagenic halogenated hydrocarbon organism.
summary of the invention:
The present invention seeks to, be used for making up the deficiencies in the prior art, and a kind of aquiculture waste water germicidal treatment method that running cost is cheap, easy and simple to handle, toxicity is little of investing is provided.
To achieve these goals, technical scheme of the present invention is as follows:
Aquiculture waste water germicidal treatment method of the present invention, is characterized in that, comprises following step:
Aquiculture waste water germicidal treatment method of the present invention comprises following step:
(1) germicidal treatment: the pH value of aquiculture waste water is adjusted to 5.2～5.8, adds Fe
2+, make Fe in aquiculture waste water
2+concentration is 0.06～0.08mol/L, then carries out ozonize, and the flow control of ozone, in 25mg/min left and right, is processed 8～10min, and making ozone concn in aquiculture waste water is 0.6～0.9mol/L;
(2) add microbial preparation: what in step (1), obtain adds photosynthetic bacteria in the aquiculture waste water of sterilization, and the concentration of described photosynthetic bacteria in breeding wastewater is 350～700mg/L;
(3) flocculation treatment: the aquiculture waste water again step (2) obtained is incorporated in the microorganism flocculation reactor, Bacillus subtilus kind daughter bacteria liquid add continuously activated cultivation in described microorganism flocculation reactor after, Bacillus subtilus kind daughter bacteria liquid and breeding wastewater volume ratio are 6:70, and the concentration of described Bacillus subtilus kind daughter bacteria liquid in breeding wastewater is 150～200mg/L;
(4) Air Exposure: aquiculture waste water step (3) obtained with air continues Air Exposure, and the residence time of aquiculture waste water in the microorganism flocculation reactor is 15～20 minutes, and gas-water ratio is 3:1, and dissolved oxygen is 6～8mg/L;
(5) separating treatment: the mixed solution produced in the microorganism flocculation reactor, the precipitation of flowing through biological treatment reactor, carry out the preliminary solid-liquid separation reaction of mixed solution in described precipitation biological treatment reactor, the settling produced is all concentrated discharge except returned sluge, returned sluge by the filtering membrane filtration treatment, completes final solid-liquid separation again;
(6) return of waste water is processed: after solid-liquid separation, separate and see through primary water in step (5), and produce concentrated waste water, the concentrated waste water of generation is back in the microorganism flocculation reactor again and continues to process.
In step (3), the residence time of above-mentioned breeding wastewater in the microorganism flocculation reactor is 18 minutes, and gas-water ratio is 3:1, and dissolved oxygen is 7mg/L;
The concentration of above-mentioned Bacillus subtilus kind daughter bacteria liquid in breeding wastewater is 195mg/L.
The concentration of above-mentioned photosynthetic bacteria in breeding wastewater is 450mg/L.
In above-mentioned steps (1), be to adopt sulfuric acid to regulate the pH value of aquiculture waste water.
Beneficial effect of the present invention is as follows:
Waste water germicidal treatment method of the present invention is processed integrated by germicidal treatment, flocculation treatment, Air Exposure, separating treatment, return of waste water, guaranteed water quality, improved again production efficiency, greatly reduce production cost, there is the advantages such as technique is simple, system stability, occupation of land is little, working cost is low.As breeding wastewater pre-process technique, microbiological coagulation method, with its special performance comprehensive utilization waste water resource, greatly reduces the organic loading of subsequent disposal.
In addition, germicidal treatment step of the present invention fast, efficient, toxicity is little, non-secondary pollution, technique are simple, easy to operate.
embodiment:
For technique means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, further set forth the present invention.
In the present embodiment, aquiculture waste water germicidal treatment method comprises following step:
(1) germicidal treatment: the pH value of aquiculture waste water is adjusted to 5.5, adds Fe
2+, make Fe in aquiculture waste water
2+concentration is 0.7mol/L, then carries out ozonize, and the flow control of ozone, in 25mg/min left and right, is processed 9min, and making ozone concn in aquiculture waste water is 0.8mol/L;
(2) add microbial preparation: what in step (1), obtain adds photosynthetic bacteria in the aquiculture waste water of sterilization, and the concentration of described photosynthetic bacteria in breeding wastewater is 500mg/L;
(3) flocculation treatment: the aquiculture waste water again step (2) obtained is incorporated in the microorganism flocculation reactor, Bacillus subtilus kind daughter bacteria liquid add continuously activated cultivation in described microorganism flocculation reactor after, Bacillus subtilus kind daughter bacteria liquid and breeding wastewater volume ratio are 6:70, and the concentration of described Bacillus subtilus kind daughter bacteria liquid in breeding wastewater is 180mg/L;
(4) Air Exposure: aquiculture waste water step (3) obtained with air continues Air Exposure, and the residence time of aquiculture waste water in the microorganism flocculation reactor is 18 minutes, and gas-water ratio is 3:1, and dissolved oxygen is 7mg/L;
(5) separating treatment: the mixed solution produced in the microorganism flocculation reactor, the precipitation of flowing through biological treatment reactor, carry out the preliminary solid-liquid separation reaction of mixed solution in described precipitation biological treatment reactor, the settling produced is all concentrated discharge except returned sluge, returned sluge by the filtering membrane filtration treatment, completes final solid-liquid separation again;
(6) return of waste water is processed: after solid-liquid separation, separate and see through primary water in step (5), and produce concentrated waste water, the concentrated waste water of generation is back in the microorganism flocculation reactor again and continues to process.
In the present embodiment, step (1) is to adopt sulfuric acid to regulate the pH value of aquiculture waste water.
Waste water germicidal treatment method of the present invention is processed integrated by germicidal treatment, flocculation treatment, Air Exposure, separating treatment, return of waste water, guaranteed water quality, improved again production efficiency, greatly reduce production cost, there is the advantages such as technique is simple, system stability, occupation of land is little, working cost is low.As breeding wastewater pre-process technique, microbiological coagulation method, with its special performance comprehensive utilization waste water resource, greatly reduces the organic loading of subsequent disposal.
In addition, germicidal treatment step of the present invention fast, efficient, toxicity is little, non-secondary pollution, technique are simple, easy to operate.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof
.
Claims (5)
1. aquiculture waste water germicidal treatment method, is characterized in that, comprises following step:
(1) germicidal treatment: the pH value of aquiculture waste water is adjusted to 5.2～5.8, adds Fe
2+, make Fe in aquiculture waste water
2+concentration is 0.06～0.08mol/L, then carries out ozonize, and the flow control of ozone, in 25mg/min left and right, is processed 8～10min, and making ozone concn in aquiculture waste water is 0.6～0.9mol/L;
(2) add microbial preparation: what in step (1), obtain adds photosynthetic bacteria in the aquiculture waste water of sterilization, and the concentration of described photosynthetic bacteria in breeding wastewater is 350～700mg/L;
(3) flocculation treatment: the aquiculture waste water again step (2) obtained is incorporated in the microorganism flocculation reactor, Bacillus subtilus kind daughter bacteria liquid add continuously activated cultivation in described microorganism flocculation reactor after, Bacillus subtilus kind daughter bacteria liquid and breeding wastewater volume ratio are 6:70, and the concentration of described Bacillus subtilus kind daughter bacteria liquid in breeding wastewater is 150～200mg/L;
(4) Air Exposure: aquiculture waste water step (3) obtained with air continues Air Exposure, and the residence time of aquiculture waste water in the microorganism flocculation reactor is 15～20 minutes, and gas-water ratio is 3:1, and dissolved oxygen is 6～8mg/L;
(5) separating treatment: the mixed solution produced in the microorganism flocculation reactor, the precipitation of flowing through biological treatment reactor, carry out the preliminary solid-liquid separation reaction of mixed solution in described precipitation biological treatment reactor, the settling produced is all concentrated discharge except returned sluge, returned sluge by the filtering membrane filtration treatment, completes final solid-liquid separation again;
(6) return of waste water is processed: after solid-liquid separation, separate and see through primary water in step (5), and produce concentrated waste water, the concentrated waste water of generation is back in the microorganism flocculation reactor again and continues to process.
2. aquiculture waste water germicidal treatment method according to claim 1, is characterized in that,
The residence time of breeding wastewater in the microorganism flocculation reactor described in step (3) is 18 minutes, and gas-water ratio is 3:1, and dissolved oxygen is 7mg/L.
3. aquiculture waste water germicidal treatment method according to claim 1, is characterized in that,
The concentration of described Bacillus subtilus kind daughter bacteria liquid in breeding wastewater is 195mg/L.
4. aquiculture waste water germicidal treatment method according to claim 1, is characterized in that,
The concentration of described photosynthetic bacteria in breeding wastewater is 450mg/L.
5. aquiculture waste water germicidal treatment method according to claim 1, is characterized in that,
In step (1), be to adopt sulfuric acid to regulate the pH value of aquiculture waste water.
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Cited By (2)
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| CN104591443A (en) * | 2015-02-08 | 2015-05-06 | 董亚伦 | Circular treatment equipment for aquiculture agricultural waste water |
| CN105080210A (en) * | 2015-07-17 | 2015-11-25 | 浙江省海洋水产研究所 | Aerated filtration treatment device for aquaculture wastewater |
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| CN104591443A (en) * | 2015-02-08 | 2015-05-06 | 董亚伦 | Circular treatment equipment for aquiculture agricultural waste water |
| CN105080210A (en) * | 2015-07-17 | 2015-11-25 | 浙江省海洋水产研究所 | Aerated filtration treatment device for aquaculture wastewater |
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Application publication date: 20140108 |