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Integrated technical method for ecologically restoring and co-producing vegetables and flowers by ground surface eutrophic water system

A technology for eutrophication and ecological restoration, applied in chemical instruments and methods, botanical equipment and methods, energy and wastewater treatment, etc., can solve problems such as high cost, long time, and unsustainable governance strategies

Active Publication Date: 2015-04-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For large natural water bodies, eutrophication treatment is a time-consuming and costly systematic project. The treatment strategy that relies entirely on government investment and taxpayers pays the bill is unsustainable, which is one of the reasons why no effective progress has been made so far.

Method used

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  • Integrated technical method for ecologically restoring and co-producing vegetables and flowers by ground surface eutrophic water system
  • Integrated technical method for ecologically restoring and co-producing vegetables and flowers by ground surface eutrophic water system
  • Integrated technical method for ecologically restoring and co-producing vegetables and flowers by ground surface eutrophic water system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The experiment was carried out in three artificial cement pools. Each pool measures 4m×3m×1m. The bottom of the two pools is filled with bottom mud from the Nanfei River in Hefei City, with a thickness of about 20cm; tap water is added to a depth of about 0.7m, and the bottom is aerated to dissolve nitrogen and phosphorus in the mud in the water. At this time, the total nitrogen in the two test pools was 10.746mg / L, the total phosphorus was 1.548mg / L, and they were in a state of severe eutrophication. The bottom of another pool is covered with 5 cm of fine sand for seed selection. The water level of the three pools is maintained by natural evaporation and rainfall balance, plus a small amount of tap water.

[0023] 1. Floating bed production: (1) Use 5cm thick polyethylene foam plastic board as the floating bed, each board is 2m×1m in size, and punch holes on the board according to the row spacing of 10cm, with a hole diameter of 1cm; (2) Use a 3cm diameter board The...

Embodiment 2

[0029] The experimental water body is the eutrophic waters of the North Lake of Baihe Park, Chizhou City, Anhui Province. It consists of two water surfaces of different sizes in the north and south, with a total area of ​​about 106 mu ( Image 6 ). There is a 3m wide and 1m deep bridge hole connecting the north and south lakes. The water area is a closed lake. In order to balance the drop in the lake surface water level caused by factors such as evaporation and leakage, a water replenishment port is set at the northeast corner of the North Lake and the closest to the Qingxi River. Hydrate to maintain water levels. Due to historical reasons, the Qingxi River has become a gathering place for urban sewage and garbage, and the degree of eutrophication is quite serious. The measured total nitrogen content of the water inlet sample is 4.15mg / L, and the total phosphorus content is 0.43mg / L. Therefore, water replenishment from the Qingxi River is also one of the reasons for the hig...

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Abstract

The invention discloses an integrated technical method for ecologically restoring and co-producing vegetables and flowers by a ground surface eutrophic water system with a large area, belonging to the field of ecological environment protection and aquatic plant germplasm resource development. The method comprises the steps of: selectively breeding plant varies which can grow and develop under water by an ion beam mutation technology so as to obtain a large quantity of seedlings by rapid propagation in a tapered seedling bowl; arranging the seedlings along with the seedling bowl onto a planting floating bed; restraining the seedlings on a target water body by an anchoring framework. A breakwater is designed, so that the method is suitable for being used for large-area water bodies such as a local water area of Chao Lake. In a project of co-producing water spinach by an eutrophic water body, which is implemented in Baihe park of Chizhou city, Anhui province, the single-season yield per mu is 9.5 tons, 32kg of nitrogen and 12kg of phosphorus are removed from the lake after all water spinach is harvested, namely, 0.642 mg / L of nitrogen and 0.242 mg / L of phosphorus respectively are reduced in 5*104m<3> of water. The harvested plants are edible vegetables and vendible flowers, the input of ecological restoration can be made up by the income of the vegetables and the flowers, and the method conforms to a sustainable eutrophic pollution abatement strategy.

Description

technical field [0001] The invention relates to an integrated technical method for ecological restoration and co-production of vegetables and flowers in surface eutrophic water system, and belongs to the technical field of ecological environmental protection and development of aquatic plant germplasm resources. Background technique [0002] The treatment of eutrophic water body must take the route of "source control", ecological restoration and watershed management. While strictly controlling pollution discharge, it is necessary to take engineering measures (such as sediment dredging, blue-green algae salvage or chemical algae killing, microbial nitrogen and phosphorus removal) to treat polluted water bodies, but in the end, bioremediation is still required to gradually restore water bodies self-cleaning ability. Nitrogen and phosphorus biologically stored (absorbed) in eutrophic water can only be permanently separated from the water body through biological transfer (ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32A01G9/02
CPCY02W10/37
Inventor 冯慧云余增亮李世良孙进吴丽芳吴正岩蔡冬清任冲杜海明李伟刘兵周澳吴敬东
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI