Method for treating waste liquid and waste gas produced by fish meal processing

A technology for waste gas treatment and waste liquid treatment, which is applied in animal processing wastewater treatment, chemical instruments and methods, separation methods, etc. It can solve problems such as corruption, stench, and restriction of economic development, and achieve simple methods, energy saving, and automation. Effect

Inactive Publication Date: 2012-03-21
龙源海洋生物股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole processing process needs to remove more than 70% of the water of the raw material weight. Since the protein and fat of the raw material may be corrupted during storage, transportation and processing, the waste liquid and waste gas odor produced by fishmeal processing are currently Small fishmeal processing enterprises generally discharge the above-mentioned waste liquid and waste gas directly without treatment or with a little treatment, causing great pollution to the surrounding environment, which not only affects people's normal life, but also restricts the development of the local economy

Method used

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  • Method for treating waste liquid and waste gas produced by fish meal processing
  • Method for treating waste liquid and waste gas produced by fish meal processing

Examples

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example 1

[0033] Use horizontal centrifugal equipment and disc centrifugal equipment to separate the oil in the squeezed liquid from water and solids, so that the water in the oil is less than 1%, and the impurities are less than 0.5%, forming crude fish oil and then refining; after separating the water and the oil The solid matter is concentrated in the next process. Heat and concentrate the above-mentioned water containing 20% ​​solids, control the temperature at 70°C to vacuum, vacuum degree: -0.095Mpa, carry out multi-effect concentration, and stop the concentration when the solid content of the concentrated solution reaches 55%. Spray the above concentrate on the press cake and dry it together.

[0034]The above cooking, drying, concentration and amine removal equipment are all equipped with a fishmeal particle trap and a waste gas collector. The fishmeal particle trap first separates and recycles the small solid particles in the waste steam, and the gas coming out of the trap is ...

example 2

[0038] Use horizontal centrifugal equipment and disc centrifugal equipment to separate the oil in the squeezed liquid from water and solids, so that the water in the oil is less than 1%, and the impurities are less than 0.5%, forming crude fish oil and then refining; after separating the water and the oil The solid matter is concentrated in the next process. Heat and concentrate the above-mentioned water containing 11% solids, control the temperature at 100°C to vacuum, vacuum degree: -0.075Mpa, carry out multi-effect concentration, stop concentrating when the solid content of the concentrated solution reaches 45%. Spray the above concentrate on the press cake and dry it together.

[0039] The above cooking, drying, concentration and amine removal equipment are all equipped with a fishmeal particle trap and a waste gas collector. The fishmeal particle trap first separates and recycles the small solid particles in the waste steam, and the gas coming out of the trap is The exha...

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Abstract

The invention relates to a method for treating waste liquid produced by fish meal processing. The method mainly comprises the following steps of: separating the oil and water in pressed liquor from a solid object by using a centrifugal device; heating and concentrating the water containing a small amount of solid object; stopping concentrating when the content of the solid object of a concentrated solution reaches 45-55%; spraying the concentrated solution to a filter cake; and drying. A method for treating waste gas produced by fish meal processing mainly comprises the following steps of: condensing and cooking, drying, concentrating, condensing the waste gas of an amine-removing device through a condenser; sending condensed water to a waste water treatment apparatus for biodegradation treatment; enabling uncondensed gas to pass through a carrier on a grid; arranging an automatic water spraying system above the carrier; and introducing the uncondensed gas subjected to gas washing to a multi-stage biodegradation device. With the adoption of the method, the foul smell waste gas and waste water produced in the fish meal processing course can be effectively treated so as to reach environment-friendly discharge standard. The method is simple, can be automatically treated in large scale and recycle heat energy and save energy when used for heating a boiler and domestic water.

Description

technical field [0001] The invention relates to a method for treating waste liquid and waste gas. Background technique [0002] Fishmeal is a high-protein feed raw material produced from low-value small miscellaneous fish or finely processed fish scraps through cooking, pressing, drying and other processes. The whole processing process needs to remove more than 70% of the water of the raw material weight. Since the protein and fat of the raw material may be corrupted during storage, transportation and processing, the waste liquid and waste gas odor produced by fishmeal processing are currently Small fishmeal processing enterprises generally discharge the above-mentioned waste liquid and waste gas directly without treatment or with a little treatment, causing great pollution to the surrounding environment, which not only affects people's normal life, but also restricts the development of the local economy. Contents of the invention [0003] The object of the present invent...

Claims

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Application Information

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IPC IPC(8): C02F9/10B01D5/00B01D53/18B01D53/84C02F9/14C02F103/22
CPCY02A50/20
Inventor 冯源
Owner 龙源海洋生物股份有限公司
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