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Method for processing waste water of circulating marine culture by using artificial wet land

A technology for artificial wetlands and marine aquaculture, applied in aerobic and anaerobic process treatment, sustainable biological treatment, chemical instruments and methods, etc., to achieve the effect of improving removal effect, improving denitrification capacity, and improving denitrification capacity

Inactive Publication Date: 2009-04-15
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies, the technical problem to be solved by the present invention is how to improve the salt-tolerant ability, denitrification ability, and phosphorus removal ability of the constructed wetland so as to be suitable for the treatment of seawater aquaculture wastewater, and provide a method of using constructed wetland to treat wastewater in circulating seawater aquaculture. Methods

Method used

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  • Method for processing waste water of circulating marine culture by using artificial wet land
  • Method for processing waste water of circulating marine culture by using artificial wet land

Examples

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Effect test

Embodiment 1

[0019] Take the effluent from a circulating marine aquaculture pond, filter it through a microfiltration machine, and then put it into a horizontal subsurface flow salt-tolerant artificial wetland for treatment, with a daily flow rate of 0.6-1m 3 / d. Sewage is poured into the artificial wetland packing bed from the gravel cloth ditch, infiltrated along the subsurface flow of the matrix, and flows out from the outlet ditch at the other end. After collection, part of the effluent is circulated back to the water inlet and mixed with the influent water. The internal circulation water and microfiltration The volume ratio of water discharged from the machine to the constructed wetland is 2:1, that is, 2 / 3 of the total water inflow to the constructed wetland is effluent from the constructed wetland. During the process of sewage flowing through the constructed wetland, various methods such as matrix filtration, adsorption, precipitation, ion exchange, plant absorption, and microbial m...

Embodiment 2

[0026] Take the effluent from a circulating mariculture pond, the water quality index SS is 150-200mg / L, BOD 5 12~15mg / L, non-ionic ammonia 0.15~0.20mg / L, NH 4 + -N is 1.0-2.5mg / L, and the pH value is 6.8-8.0. After being filtered by a microfiltration machine, it is put into a horizontal subsurface flow salt-tolerant artificial wetland for treatment, with a daily flow rate of 0.5-1.5m 3 / d. The designed size of the constructed wetland packing bed is 3m×2m×0.7m in length×width×height, and it is divided into two regions with the anaerobic zone in front and the aerobic zone in the back. The length is 2.4m. The artificial mixed matrix in the anaerobic zone of the packed bed is composed of blast furnace steel slag and fly ash in a volume ratio of 3:1, without providing oxygen, making it an anaerobic environment. The artificial mixed matrix in the aerobic zone of the packed bed is composed of the main material and the auxiliary material in a ratio of 6:1 by volume, wherein the ...

Embodiment 3

[0028] Take the effluent from a circulating mariculture pond, the water quality index SS is 180-300mg / L, BOD 5 17~25mg / L, non-ionic ammonia 0.25~0.40mg / L, NH 4 + -N is 2.0-2.8mg / L, and the pH value is 6.6-8.0. After being filtered by a microfiltration machine, it is put into a horizontal subsurface flow salt-tolerant artificial wetland for treatment, with a daily flow rate of 0.5-1.5m 3 / d. The designed size of the constructed wetland packing bed is 3m×2m×0.7m in length×width×height, and it is divided into two regions with the anaerobic zone in front and the aerobic zone in the back. The anaerobic zone is 1.2m long and the aerobic zone is The length is 1.8m. The artificial mixed matrix in the anaerobic zone of the packed bed is composed of blast furnace steel slag and fly ash at a volume ratio of 10:1, and does not provide oxygen, making it an anaerobic environment. The artificial mixed matrix in the aerobic zone of the packed bed is composed of the main material and the ...

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Abstract

The invention provides a method for using artificial wetlands for processing the waste water in circular seaculture, which comprises the following steps: the waste water is first filtered by a microstrainer and then led to an artificial wetland for treatment; the artificial wetland is in the form of a horizontal undercurrent packed bed and is divided into a front anaerobic zone and a back aerobic zone, the surface area ratio of which is 1-2:4-3, no plants are in the filler of the anaerobic zone while salt tolerant plants are planted in the filler of the aerobic zone; the effluent from the microstrainer sequentially flows through the anaerobic zone and the aerobic zone to be discharged, and the water flowing to the anaerobic zone contains the water flowing out of the aerobic zone. The artificial wetland provided by the invention is capable of seawater processing, denitrification, denitrogenation and dephosphorization, and can effectively process the suspended matters, organic matters, nitrogen, phosphorus and the like in the sewage flowing through the artificial wetland in multiple ways and cause the effluent quality to reach the water quality standard requirements of fishery industry of China, thus realizing the aim of recycling the effluent. Compared with the prior art, the invention has the advantages of good treatment effect, low cost and environment protection but no pollution.

Description

technical field [0001] The invention relates to a method for using artificial wetlands to treat wastewater in circulating seawater aquaculture, and belongs to the fields of environmental protection technology and aquaculture technology by biological means. Background technique [0002] Mariculture methods such as traditional shallow sea aquaculture and marine tidal aquaculture are increasingly polluting the marine environment due to eutrophication problems. At the same time, other pollution in the aquaculture environment is gradually restricting the further development of the mariculture industry. Recirculating mariculture is a technology that recycles seawater for aquaculture. It has high expectations because it can meet the needs of intensive production without polluting the environment. It has the advantages of saving land and water consumption, short aquaculture cycle, high output The advantages of high product prices. The wastewater treatment technology required for se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30
CPCY02W10/10
Inventor 高锋金卫红李晨曹根庭
Owner ZHEJIANG OCEAN UNIV
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