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Sewage treating method for chitin production process

A sewage treatment method and production process technology, which can be used in neutralization water/sewage treatment, heating water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of pollution and energy saving

Inactive Publication Date: 2008-07-16
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of treating this type of water only considers that it is wastewater with high protein content, but does not treat it as wastewater with high oil content, which affects its treatment effect

Method used

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  • Sewage treating method for chitin production process
  • Sewage treating method for chitin production process
  • Sewage treating method for chitin production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of sewage treatment method in the production process of chitin, comprising the following steps: the raw material shrimp shells are extruded and washed with comprehensive wastewater in the comprehensive wastewater regulating tank, and the raw material shrimp shells after washing are drained in alkali Boil with 8% sodium hydroxide solution in the boiling pool for 2 hours, separate the shell from the alkaline waste liquid, drain, introduce the alkaline waste liquid into the alkali treatment waste liquid storage tank, and use the acidic waste liquid in the alkali treatment waste liquid storage tank Adjust the pH value of the alkali boiling waste liquid to the isoelectric point, after recovering the protein and oil separation treatment, the clear liquid is introduced into the washing tank of the alkali treatment shell, and the alkali boiling shell is washed two to three times in the washing tank of the alkali treatment shell (the acid washing water is not ...

Embodiment 2

[0023] Embodiment 2: a sewage treatment method in the production process of chitin, comprising the following steps: soak the raw shrimp shells in an alkali immersion tank with 8% sodium hydroxide solution for 2 days, separate the shells from the alkaline waste liquid, and The alkaline waste liquid is introduced into the alkali treatment waste liquid storage tank, and the acidic solution is used to neutralize the alkaline immersion waste liquid in the alkali treatment waste liquid storage tank to the isoelectric point. After the oil separation treatment, the clear liquid is introduced into the alkali treatment shell water washing tank, After the treated clear liquid and acidic shell washing water wash the shell after alkali treatment for two to three times (when the washing water is not enough, it can be washed with tap water), then introduce the alkaline washing wastewater into the comprehensive wastewater regulating tank, and use flocculant in the comprehensive wastewater regul...

Embodiment 3

[0024]Embodiment 3: a kind of sewage treatment method in chitin production process, comprises the following steps: the raw material shrimp shell is soaked with 10% sodium hydroxide solution for 2 days in the alkaline immersion pool, the shell is separated from the alkaline waste liquid, and The alkaline waste liquid is introduced into the alkali treatment waste liquid storage tank, and the alkaline leaching waste liquid is neutralized with an acidic solution in the alkali treatment waste liquid storage tank to the isoelectric point, and then introduced into the alkali treatment shell washing pool after oil separation treatment, and the acidic wastewater is used for alkali leaching shell After washing two to three times, the washing water is precipitated with a flocculant to recover protein, and then the treated wastewater is introduced into the comprehensive wastewater tank adjustment tank; the cleaned alkali-treated shell is drained and then used in the acid leaching tank with ...

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Abstract

The invention discloses a sewage treatment method during chitin production process, which includes the raw material pretreatment, craft steps such as acid pickling processing and alkali treatment, the characteristic is separately in disposal basin center which carries on waste water processing in each processing craft stage, the recycling waste, after carried on various crafts stage processing waste water uses again, the merit lay in the traditional terminal processing method in each craft stage distinction alone for the sewage treatment, remove the pollution like protein in the alkali treatment waste liquid during the alkali treatment craft stage , the fat, the pigment and so on, which make it cannot enter the acid pickling craft stage, and avoided the overlapping pollution.

Description

technical field [0001] The invention relates to a chitin production method, in particular to a sewage treatment method in the chitin production process. Background technique [0002] Chitin (also known as chitin) is a substance with a very wide range of applications. It plays a very important role in various fields such as food, medicine, chemical industry and agriculture. At present, most chitin production methods are based on shrimp and crab shells. etc. are raw materials, and the acid-base method is adopted for processing, and the production method of a kind of snail chitin introduced in No. 02120794.1 Chinese invention patent also basically adopts the above-mentioned method. The production process of chitin is usually accompanied by a large amount of by-products such as protein, chloride and a considerable amount of oil. The production waste liquid and waste water have a large color and high COD and BOD values. The production waste water needs to be treated. The existing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/66C02F1/04C01F11/24
CPCY02W10/37
Inventor 周湘池刘必谦徐君义
Owner NINGBO UNIV
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