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Preparation and application of a composite filler applied to a combined three-effect ecological floating bed

A composite filler and ecological floating bed technology, which is used in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Poor fixation effect, easy to be swallowed by herbivores, etc., to achieve the effect of improving water purification capacity, abundant pores, and stable physical and chemical properties

Active Publication Date: 2020-03-31
INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After years of research and practice, researchers have found that the traditional ecological floating bed has the following shortcomings: (1) plant roots suspended in the water body are easily swallowed by herbivores; (2) the biofilm attached to the plant root system on the floating bed is limited; (3) ) The floating bed does not have a good fixation effect on the roots of the plants, and the plants are easy to float and fall, which leads to poor purification effect of the floating bed
However, due to the influence of rainfall intensity, fertilization amount, fertilization time, fertilizer type and other factors, farmland non-point source pollution has the characteristics of large amount, low concentration and large concentration fluctuation. normal plant growth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] The preparation method of above-mentioned any described composite filler, comprises the following steps:

[0048] 1) Ingredients: Biochar, zeolite, iron oxide, and bentonite crushed to a suitable size are prepared according to the stated ratio. Fully dissolve the binder with an appropriate amount of water to prepare a 3-7wt.% binder solution;

[0049] 2) Mixing and granulation: Stir biochar, zeolite, iron oxide, and bentonite evenly, and spray the binder solution while mixing to make spherical particles with a water content of 40-65% and a particle size of 1.0-5.0mm;

[0050] 3) Drying: put the spherical particles into an oven and dry at 45-80°C for 3-8 hours;

[0051] 4) Curing: Put the dried pellets into a high-temperature oven at 110-180°C for high-temperature curing, and the curing time is 0.5-3 hours;

[0052] 5) cooling: naturally cooling the spherical hard solid filler A obtained in step 4) to room temperature;

[0053] 6) Composite foaming: Add polyether poly...

Embodiment 1

[0061] Embodiment 1. A kind of preparation method of combined three-effect ecological floating bed filler

[0062] (1) Take 2.0kg of biochar, 1.5kg of zeolite, 1.0kg of iron oxide, and 0.5kg of bentonite, respectively, pulverize and pass through a 60-mesh sieve, and then physically mix the 4 materials evenly;

[0063] (2) Dissolve 0.25kg sodium carboxymethyl cellulose with 5.0L 50°C water to prepare a binder solution;

[0064] (3) Put the material obtained in step (1) into a disc granulator, and spray it into the binder solution prepared in step (2) while rotating to obtain a spherical filler with a diameter of about 1.0 to 2.0 mm;

[0065] (4) Put the spherical packing obtained in step (3) into an oven and dry at 60°C for 6.0 hours.

[0066] (5) Put the dried filler in a high-temperature oven at 140°C for 2.0 hours, and then cool it down to room temperature naturally.

[0067] (6) Put the spherical hard solid filler A prepared in step (5) into a stirring tank, then add 1.28...

Embodiment 2

[0069] Embodiment 2. Application of a combined three-effect ecological floating bed filler

[0070] Put the composite filler prepared in Example 1 into the filler frame of the ecological floating bed, insert the cuttage in the filler with a height of about 15 cm, have 2 to 4 branched spinach plants, and cut 5 spinach plants in each floating bed filler basket. The ecological floating bed is placed in the farmland water discharge ditch, and the coverage rate of the ecological floating bed in the treatment section reaches 30%. The test lasted 30 days, and the water quality, water spinach biomass, and microbial biomass in the filler were detected at the beginning and end of the test. Test result shows: use embodiment 1 to prepare gained composite filler and plant the ecological floating bed treatment of water spinach, the ammonia nitrogen concentration of water body is reduced to 10.5mg / L from 61.2mg / L, and purification rate reaches 82.8%; TN concentration is from 125.7mg / L, Redu...

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Abstract

The invention discloses a preparation method and an application for a filling material applied to a combined triple-effect ecological floating bed. The invention is to improve water purifying abilityand nutrient supplying performance of a substrate in a conventional ecological floating bed. The filling material is prepared by compounding a hard solid filling material A and a polyurethane sponge soft filling material B. The preparation method comprises the following preparation processes: batching, mixing and granulating, drying, curing, cooling, and compounding and foaming. According to the invention, used raw materials are low in price; the manufacturing method is simple; and an obtained filling material has the advantages of large specific surface area, high porosity, good microbial biofilm-forming performance, strong nitrogen and phosphorus removal abilities, etc. The filling material is applied to the combined triple-effect ecological floating bed, and can greatly improve removalcapacity of a ecological floating bed device to nitrogen and phosphorus nutrient elements in a water body; and the filling material has nitrogen-phosphorus sustained-release properties, can provide astable nutrient supply environment for the growth of crops, and is extremely applicable to in-situ purification treatment of a eutrophic water body, specifically to purification of a water body with non-point source pollution in a farmland.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a preparation method and application of a composite filler applied to a combined three-effect ecological floating bed. Background technique [0002] Ecological floating bed is an in-situ water restoration technology that has emerged in recent years. At present, this technology is widely used in the purification of eutrophic lake water and fishery wastewater. This technology has the characteristics of no land occupation, low cost, convenient installation, good repair effect, and simple operation and management. [0003] After years of research and practice, researchers have found that the traditional ecological floating bed has the following shortcomings: (1) plant roots suspended in the water body are easily swallowed by herbivores; (2) the biofilm attached to the plant root system on the floating bed is limited; (3) ) The floating bed has a poor fixing effect on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/34C02F101/10C02F101/16C02F101/30
CPCC02F3/32C02F3/34C02F2101/105C02F2101/16C02F2101/308
Inventor 涂玉婷黄继川彭智平吴雪娜林志军杨林香
Owner INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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