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Aquaculture nutrition sustained release agent and preparation method thereof

A technology for aquaculture and slow-release agents, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as the deterioration of the aquaculture environment and the decrease of seawater pH value, and achieve the improvement of aquaculture water and increase the pH value , Improve the effect of the substrate environment

Inactive Publication Date: 2017-01-04
HENGMAO IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of existing seawater pH value reduction and aquaculture environment deterioration, the invention provides a kind of aquaculture nutrient slow-release agent and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of an aquaculture nutrient slow-release agent, which undergoes the following process steps:

[0023] (1) Raw material pretreatment Select oyster shells as raw materials, wash them, remove salt and impurities, dry them, and crush them with a hammer mill to make small pieces of shells with a diameter of 3 cm;

[0024] (2) Calcination Send the small pieces of shells prepared in step (1) into the calcination equipment for calcination for 2 hours, wherein the calcination temperature is controlled at 400°C;

[0025] (3) Cooling Take out the calcined shell pieces obtained in step (2), and cool to normal temperature;

[0026] (4) Pulverization Send the cooled shell pieces obtained in step (3) into a Raymond mill for ultra-fine pulverization and sieve to obtain activated shell powder, wherein the activated shell powder particle size is controlled Between 400 mesh;

[0027] (5) Mix and weigh 1000g of the activated shell powder obtained in step (4), and add ...

Embodiment 2

[0032] A preparation method of an aquaculture nutrient slow-release agent, which undergoes the following process steps:

[0033] (1) Pretreatment of raw materials Select scallop shells as raw materials, wash them, remove salt and impurities, dry them, and crush them with a hammer mill to make small pieces of shells with a diameter of 4 cm;

[0034] (2) Calcination Send the small pieces of shells prepared in step (1) into the calcination equipment for calcination for 1 hour, wherein the calcination temperature is controlled at 600°C;

[0035] (3) Cooling Take out the calcined shell pieces obtained in step (2), and cool to normal temperature;

[0036] (4) Pulverization Send the cooled shell pieces obtained in step (3) into a Raymond mill for ultra-fine pulverization and sieve to obtain activated shell powder, wherein the activated shell powder particle size is controlled Between 60 mesh;

[0037] (5) Mix and weigh 1000g of the activated shell powder obtained in step (4), and a...

Embodiment 3

[0042] A preparation method of an aquaculture nutrient slow-release agent, which undergoes the following process steps:

[0043] Raw material pretreatment Select oyster shells and scallop shells as raw materials, the mass ratio of oyster shells and scallop shells is 2:1, wash them, remove salt and impurities, dry them, and crush them with a hammer mill to make them with a diameter of 2cm small pieces of shells;

[0044] (2) Calcination Send the small pieces of shells prepared in step (1) into the calcination equipment for calcination for 3 hours, wherein the calcination temperature is controlled at 300°C;

[0045] (3) Cooling Take out the calcined shell pieces obtained in step (2), and cool to normal temperature;

[0046] (4) Pulverization Send the cooled shell pieces obtained in step (3) into a Raymond mill for ultra-fine pulverization and sieve to obtain activated shell powder, wherein the activated shell powder particle size is controlled Between 600 mesh;

[0047] (5) M...

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Abstract

The invention discloses an aquaculture nutrition sustained release agent and a preparation method thereof. The problems of decrease of existing seawater pH values and culture environment deterioration are mainly to be solved. The preparation method includes subjecting oyster shells or / and scallop shells to cleaning pretreatment, crushing, calcinating, cooling, grinding to obtain activated shell powder, selecting the shell powder, adding magnesium oxide, trace elements, sodium alginate, chitosan, adhesives and an appropriate quantity of water into the shell powder, mixing evenly, forming, drying and sorting to obtain different grades of aquaculture nutrition sustained release agents. The aquaculture nutrition sustained release agent is capable of increasing seawater carbonate saturability effectively, increasing the shell calcification rate remarkably, improving fatness of the shells and culture water quality, promoting shell growth and increasing a water body pH value and the culture organism survival rate. The preparation method is reasonable in preparation technology, feasible to operate and easy to achieve large-scale production.

Description

technical field [0001] The invention relates to the cultivation of fish, shellfish, etc., in particular to an aquaculture nutrient slow-release agent and a preparation method thereof. Background technique [0002] As we all know, high-density seawater intensive aquaculture is very common. Long-term mariculture production activities have led to the accumulation of a large amount of organic debris in the bottom of the coastal waters. The content of harmful substances such as hydrogen sulfide in the bottom of these sea areas has increased, which seriously damages the benthic ecological environment and causes frequent diseases of the breeding objects. The deterioration of the ecological environment of aquaculture waters has become an important factor restricting the healthy development of the industry. In addition, human activities lead to accelerated emission of carbon dioxide, a large amount of which is absorbed by the ocean. Therefore, the average pH value of the global surf...

Claims

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Application Information

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IPC IPC(8): C05G3/08C02F1/68C02F1/28C02F1/66C02F101/10C05G3/90
CPCC02F1/288C02F1/66C02F1/68C02F2101/101C05B1/04C05G3/90C05B7/00C05C3/00C05D1/00C05D5/00C05D9/02C05F1/005C05D9/00
Inventor 张智樊海英方建光山口恵長尾正憲
Owner HENGMAO IND GRP
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