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Microwave-enhanced method for preparing amino acid liquid fertilizer by hydrolyzing died-of-illness-pig disposal wastewater and meat and bone meal

A technology of liquid fertilizer and meat and bone meal, which is applied in the direction of liquid fertilizer, animal carcass fertilizer, sewage/sludge fertilizer, etc., can solve the problems of difficult handling, waste of resources, high concentration of organic matter, etc., and achieve short reaction time, high efficiency, and obvious environmental protection Effects and Economic Benefits

Inactive Publication Date: 2017-12-29
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentration of organic matter in the waste water from sick and dead pigs is high, which is difficult to treat. Moreover, the waste water is rich in nutrients such as protein, amino acid, calcium, and magnesium. Even if the conventional biochemical treatment can meet the discharge standards, it will cause waste of resources

Method used

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  • Microwave-enhanced method for preparing amino acid liquid fertilizer by hydrolyzing died-of-illness-pig disposal wastewater and meat and bone meal
  • Microwave-enhanced method for preparing amino acid liquid fertilizer by hydrolyzing died-of-illness-pig disposal wastewater and meat and bone meal
  • Microwave-enhanced method for preparing amino acid liquid fertilizer by hydrolyzing died-of-illness-pig disposal wastewater and meat and bone meal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of Amino Acid Liquid Fertilizer by Microwave-Enhanced Hydrolysis of Chemical Wastewater from Sick and Dead Pigs

[0022] In the first step, the chemical wastewater from sick and dead pigs was mixed with concentrated hydrochloric acid at a volume ratio of 1:1 to prepare 1L of hydrochloric acid organic wastewater with a concentration of 6mol / L;

[0023] In the second step, the hydrochloric acid organic wastewater is acid-hydrolyzed at 100°C and 0.1MPa for 0.75h under the assistance of 420W microwave to obtain the acid hydrolyzate of chemical wastewater;

[0024] The third step is to add 200g KOH to 1L of sick and dead pig chemical wastewater, and mix well to prepare 20% potassium hydroxide organic wastewater;

[0025] The fourth step is to hydrolyze the potassium hydroxide organic waste water with the aid of 230W microwave at 121°C and 0.15 MPa for 1.5 hours to obtain the alkali hydrolyzate of chemical waste water;

[0026] The fifth step is to mix ...

Embodiment 2

[0030] Example 2 Preparation of Amino Acid Liquid Fertilizer by Hydrolysis of Sick and Dead Pig Chemical Wastewater and Meat and Bone Meal

[0031] In the first step, the chemical wastewater from sick and dead pigs was mixed with concentrated hydrochloric acid at a volume ratio of 1:1 to prepare 1L of hydrochloric acid organic wastewater with a concentration of 6mol / L;

[0032] In the second step, the hydrochloric acid organic wastewater and meat and bone meal are mixed according to the volume to mass ratio of 4:1, placed in a sterilizing pot, and acid hydrolyzed at 100°C and 0.1MPa for 6 hours to obtain the acidity of the chemical wastewater and meat and bone meal. Hydrolyzate;

[0033] The third step is to add 200g KOH to 1L of sick and dead pig chemical wastewater, and mix well to prepare 20% potassium hydroxide organic wastewater;

[0034] In the fourth step, the potassium hydroxide organic waste water and the meat and bone meal were mixed according to the volume to mass ...

Embodiment 3

[0037] Example 3 Preparation of Amino Acid Liquid Fertilizer by Microwave-Enhanced Hydrolysis of Sick and Dead Pig Wastewater and Meat and Bone Meal

[0038] In the first step, 1L of hydrochloric acid organic wastewater with a concentration of 4, 5, and 6 mol / L was prepared by mixing the waste water from sick and dead pigs with concentrated hydrochloric acid in an appropriate volume ratio; Volume to mass ratio mixing, acid hydrolysis under microwave conditions of 230-570W, 100°C, 0.1MPa for 0.5-1h, to obtain the acid hydrolyzate of chemical waste water and meat and bone meal; microwave-enhanced sick and dead pig chemical waste water and meat were screened through orthogonal experiments The optimal technological conditions of acid hydrolysis of bone powder, the results are shown in Table 2.

[0039] The results of orthogonal experiments show that under the conditions of microwave power of 420W, concentration of hydrochloric acid in organic wastewater of 6mol / L, and microwave-en...

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Abstract

The invention relates to a microwave-enhanced method for preparing amino acid liquid fertilizer by hydrolyzing died-of-illness-pig disposal wastewater and meat and bone meal. The method comprises the following steps of S1, confecting of acidic and alkaline organic wastewater; S2, microwave-enhanced acidic hydrolysis of the wastewater and the meat and bone meal; S3, microwave-enhanced alkaline hydrolysis of the wastewater and the meat and bone meal; S4, neutralization of acidic and alkaline hydrolysate, so as to prepare the amino acid liquid fertilizer. The method is short in reaction time and high in the efficiency of converting protein into an amino acid, meanwhile, is used for realizing the zero release of the died-of-illness-pig disposal wastewater and producing the high-value amino acid liquid fertilizer, and has obvious environmental effect and economic benefit.

Description

technical field [0001] The invention relates to the technical field of livestock and poultry breeding pollution control and amino acid fertilizer, in particular to a method for preparing amino acid liquid fertilizer by microwave-enhanced hydrolysis of dead pig chemical waste water and meat and bone meal. Background technique [0002] With the large-scale and standardized development of pig breeding, a considerable number of sick and dead pigs are concentrated. Statistics show that the mortality rate in the pig breeding process in my country is about 8% to 12%, and more than 100 million dead pigs are produced every year. The harmless treatment of sick and dead pigs is related to the sustainable development of the pig industry and the safety of public environmental health, and has increasingly attracted the attention of the public and government departments. [0003] At present, the technologies used for the harmless treatment of sick and dead pigs are mainly divided into fou...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05C11/00
CPCC05C11/00C05G5/20C05D1/00C05F7/00C05F1/00
Inventor 肖乃东王艳珍周文兵朱端卫蔡建波
Owner HUAZHONG AGRI UNIV