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Water and fertilizer irrigation integrated system based on sponge iron reduction

A technology of sponge iron and water fertilizer, which is applied in liquid fertilizer regulating system, direct liquid fertilizer delivery system, fertilization device, etc., can solve the problems of low tolerance and harm, increase the ability to tolerate heavy metal Cd, and reduce nitrogen pollution , which is conducive to the effect of efficient utilization

Inactive Publication Date: 2021-10-19
SHANGHAI GEZHI HIGH SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although fish and other aquatic animals are sensitive to NH 4 + was less tolerated, but NO 3 - The hazards are potentially cumulative

Method used

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  • Water and fertilizer irrigation integrated system based on sponge iron reduction
  • Water and fertilizer irrigation integrated system based on sponge iron reduction
  • Water and fertilizer irrigation integrated system based on sponge iron reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides an integrated water and fertilizer irrigation system based on sponge iron reduction, including the first water pump 2, the sponge iron chemical reduction device, the irrigation adjustment pool 17, the second water pump 19 and the drip irrigation pipe 21 connected in sequence by pipelines; The chemical reduction device is filled with sponge iron filler 9, and the particle diameter of the sponge iron filler 9 is 0.5-1.0 mm.

[0031] A first gate valve 14 is arranged on the pipeline between the above-mentioned sponge iron chemical reduction device and the irrigation adjustment pond 17; a second gate valve 18 is arranged on the pipeline between the irrigation adjustment pond 17 and the second water pump 19; the second water pump 19 and the drip irrigation A second flowmeter 20 is arranged between the pipes 21; the first water pump 2 is connected with the suction pipe 1.

[0032] Sponge iron is zero-valent iron obtained by reducing hematite wi...

Embodiment 2

[0043] 2.1 Experiment of reducing nitrate nitrogen by sponge iron

[0044] Prepare 5 1L Erlenmeyer flasks with rubber stoppers, fill 4 Erlenmeyer flasks with sponge iron particles (particle size 0.5-1mm) washed with tap water, and 1 as a blank control. Then add NO to the blank control 3- Concentration of 30mg / L solution, add NO to the remaining 4 flasks 3- The concentration is 10mg / L, 20mg / L, 30mg / L, 40mg / L (chemically pure KNO 3 After metering configuration) solution. The solutions were all filled to the rubber stopper position, and then rubber stoppers (marked as CK30, N10, N20, N30, N40) were added.

[0045] At 1h, 2h, 3h, 4h, and 6h, water samples were drawn with a syringe, and the concentrations of nitrate nitrogen and ammonia nitrogen and pH in the water were measured. Experimental results such as figure 2 shown.

[0046] It can be seen that under the same other conditions, in different concentrations of nitrate-nitrogen solutions, adding sponge iron with the same...

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Abstract

The invention discloses a water and fertilizer irrigation integrated system based on sponge iron reduction. The water and fertilizer irrigation integrated system comprises a first water pump, a sponge iron chemical reduction device, an irrigation adjusting tank, a second water pump and a drip irrigation pipe which are sequentially connected through pipelines, the sponge iron chemical reduction device is filled with sponge iron filler, and the particle size of the sponge iron filler particles is 0.5-1.0 millimeter. According to the water and fertilizer irrigation integrated system, when surface water or underground water is adopted as a water source to irrigate a farmland, nitrate nitrogen in water is rapidly converted into ammonia nitrogen and enters soil along with water, efficient utilization of nitrogen fertilizer is facilitated, farmland nitrogen loss is reduced, nitrogen pollution to the water environment is reduced, and the system is simple, convenient, low in operation cost and very suitable for being used and popularized in agriculture.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation, in particular to an integrated water and fertilizer irrigation system based on the reduction of sponge iron. Background technique [0002] Nitrogen pollution has been a worldwide water environmental problem for many years. According to the "Environmental Status Bulletin" issued by the Ministry of Ecology and Environment for many years, the concentration of ammonia nitrogen in surface water, "three nitrogens" in groundwater, and inorganic nitrogen in coastal waters are all major pollution indicators. It has been reported that after the 1990s, the nitrogen concentration in many water catchment areas rose rapidly to above 15 mg / L. At present, the rate of human-induced nitrogen discharge into freshwater in China is 14.5 million tons per year, which is about the estimated safe discharge threshold ( 2.7 times that of 5.2 million tons / year). There are various sources of nitrogen pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C23/02A01C23/00A01G25/02A01G25/16
CPCA01C23/042A01C23/007A01G25/02A01G25/16
Inventor 胡健宋逸帆
Owner SHANGHAI GEZHI HIGH SCHOOL
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