Simple removal method for cadmium in scallop processing waste

A waste and scallop technology, which is applied in the field of simple removal of cadmium in scallop processing waste, can solve the problems of no good treatment method for cadmium waste liquid and the inability to realize better utilization of waste raw materials, etc., and achieve good cadmium removal effect , easy to operate, to achieve the effect of reuse

Inactive Publication Date: 2019-12-13
GUANGDONG OCEAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects that the existing scallop processing waste adopts homogenate treatment to remove cadmium, can not realize better utilization of waste raw materials, and has no good treatment method for waste liquid from cadmium removal, and provides a scallop processing A Simple Method for Removing Cadmium from Waste

Method used

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  • Simple removal method for cadmium in scallop processing waste

Examples

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Comparison scheme
Effect test

Embodiment 1

[0053] This example provides a simple method for removing cadmium from scallop processing waste, and the specific process is as follows.

[0054] (1) Get 100g scallop processing waste (including scallop skirt and viscera), add 4% citric acid and 10% distilled water by weight of the waste, carry out pickling at 55-60°C and filter, separate solid-liquid, and wash Dehydration 1. Add distilled water with twice the amount of solids for washing, and then perform solid-liquid separation again, then add distilled water with twice the amount of solids for washing with water for the second time. After solid-liquid separation, mix the eluents to obtain eluent 2. At this time, the cadmium removal rate is 94%, and the complete scallop skirt and viscera can be obtained, which is beneficial to further processing.

[0055] (2) Take 50mL of eluent 2, add raw eggshells in three times, the addition amount is 5%, 3% and 2% respectively (relative to the mass fraction of eluent), the shaking condi...

Embodiment 2

[0057] This example provides a simple method for removing cadmium from scallop processing waste, and the specific process is as follows.

[0058] (1) Get 100g of scallop processing waste (including scallop skirt and viscera), add 4% acetic acid of waste weight, then add 10% of waste weight distilled water, pickle at 55-60°C, filter, and separate solid and liquid , to obtain eluent 1; then add distilled water twice the amount of solids to wash and then separate, and then perform a second wash with water twice the weight of the solids. After solid-liquid separation, the eluents are mixed. At this time, the cadmium removal rate is 89%, and the complete scallop skirt and viscera can be obtained, which is beneficial for further processing.

[0059] (2) Take 50mL eluent 2 and add raw eggshells to the eluent three times, the addition amount is 3%, 2% and 1% respectively, the shaking condition is 30°C, the shaking speed is 139r / min, and the total shaking time is 3h (single shaking ti...

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Abstract

The invention relates to a simple removal method for cadmium in scallop processing waste. The method comprises the following steps that S1, scallop processing waste is subjected to acid pickling through organic acid, then solid-liquid separation is conducted after water washing, and cleaned scallop processing waste and a scallop cadmium removal eluent are obtained; and S2, eggshells with eggshellmembranes are added into the scallop cadmium removal eluent, oscillating is carried out, and separating is carried out to obtain the scallop cadmium removal eluent. According to the method, firstly, cadmium in the waste is removed through a mild treatment method of organic acid pickling and water washing, the cadmium in the waste can be well removed without homogenizing the waste, an original state of the original waste can be maintained to a large extent, and the waste serves as a food raw material to be further processed and utilized; then the eggshells with eggshell membranes are used for adsorbing cadmium in the cadmium removal eluent, cadmium in eluent can be effectively adsorbed, the adsorbed cadmium is easily separated from the eggshells, and recycling of cadmium ions is achieved; and the original nutrient elements in the eluent are not lost.

Description

technical field [0001] The invention relates to the technical field of scallop processing, in particular to a simple method for removing cadmium from scallop processing waste. Background technique [0002] Shellfish is a filter-feeding organism, which is greatly affected by water pollutants. It will enrich heavy metals in its body through ingested seawater and algae, especially in internal organs. It is relatively harmful, and its content is about 5-10mg / kg, exceeding the national standard of 2.0mg / kg. Therefore, the mantle, digestive tract, circulatory system, kidneys, and gonads of scallops cannot be directly processed and utilized, but need to be processed. However, in actual production, it takes a lot of labor to separate the viscera from the scallop skirt. Operation is difficult, time-consuming and labor-intensive. Therefore, most of this part is buried or burned as waste, which not only causes a waste of resources but also pollutes the environment. The output of sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20
CPCA23L5/27
Inventor 毛伟杰任惠峰杨萍高晓欣
Owner GUANGDONG OCEAN UNIVERSITY
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