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A method for utilizing livestock and poultry slaughter waste
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A waste, livestock and poultry technology, applied in the field of utilization of livestock and poultry slaughtering waste, to achieve the effect of prolonging the coagulation time, excellent cost performance, and enhanced flexural strength
Active Publication Date: 2018-11-06
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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[0004] Judging from the current situation of the utilization of livestock and poultry slaughtering waste, most of its fields involve human and livestock feed, fertilizer, etc., which are closely related to human health and have certain risks
Method used
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Embodiment 2
[0026] Example 2 Add 8 parts of pork bone, 40 parts of pork, 2 parts of pig fur, 45 parts of concentrated hydrochloric acid and 95 parts of water into the reactor, stir for acid hydrolysis, the hydrolysis temperature is 94°C, and the hydrolysis time is 7 hours. Cool down after the reaction , filtered to obtain the mixed solution; adding trisodium phosphate solution, modifying the pH of the mixed solution to 8, and obtaining a gypsum retarder.
[0027] The desulfurization hemihydrate gypsum was mixed with the retarder (in terms of solid content) prepared in this example, and the water-material ratio was 0.58, and the setting time and strength performance tests were carried out.
Embodiment 3
[0028] Example 3 Add 12 parts of sheep bone, 25 parts of mutton, 5 parts of sheep fur, 40 parts of concentrated hydrochloric acid and 100 parts of water into the reactor, stir for acid hydrolysis, the hydrolysis temperature is 90°C, and the hydrolysis time is 5 hours. Cool down after the reaction , and filtered to obtain the mixed solution; adding trisodium phosphate solution to modify the pH of the mixed solution to 9 to obtain a gypsum retarder.
[0029] The desulfurization hemihydrate gypsum was mixed with the retarder (in terms of solid content) prepared in this example, and the water-material ratio was 0.58, and the setting time and strength performance tests were carried out.
Embodiment 4
[0030] Example 4 Add 47 parts of chicken, 5 parts of chicken feathers, 47 parts of concentrated hydrochloric acid and 92 parts of water into the reactor, stir for acid hydrolysis, the hydrolysis temperature is 96°C, and the hydrolysis time is 6 hours. After the reaction is completed, cool and filter to obtain the mixed solution; Trisodium phosphate solution is added to modify the pH of the mixed solution to 7 to obtain a gypsum retarder.
[0031] The desulfurization hemihydrate gypsum was mixed with the retarder (in terms of solid content) prepared in this example, and the water-material ratio was 0.58, and the setting time and strength performance tests were carried out.
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Abstract
The invention relates to a utilization method of livestock and poultry slaughtering waste. Livestock and poultry slaughtering waste is adopted as the raw material, and physical purification, acidolysis, trisodium phosphate modification and other steps are carried out to prepare a gypsum retarder. The method specifically includes: 1) the animal wastes for removing impurities from the livestock and poultry waste, performing cleaning, removing dirt and then conducting crushing; 2) adding the crushed waste into a reactor, adding concentrated hydrochloric acid and water to carry out acid hydrolysis reaction at a hydrolysis temperature of 90-98DEG C for 5-7h, performing cooling at the end of reaction, and carrying out filtering to obtain a mixed solution; and 3) using a trisodium phosphate solution to conduct modification treatment on the mixed solution obtained in step 2) for 5-10min to a pH of 7-9, thus obtaining the gypsum retarder. The method provided by the invention solves the safety and clean utilization problems of livestock and poultry slaughtering waste, is of important practical significance to development and utilization of discarded animal protein, realizes best use of things, and saves resources. The retarder obtained by the method provided by the invention has good retarding effect and little negative influence on the strength of gypsum material.
Description
technical field [0001] The invention relates to a method for preparing a gypsum retarder by using livestock and poultry slaughter waste as a raw material through steps such as impurity removal, cleaning, acidolysis, and modification with trisodium phosphate, and the obtained retarder is used in the production of gypsum building materials with application. Background technique [0002] my country is a country rich in animal protein resources. The slaughtering and consumption of livestock and poultry ranks among the top in the world. A large amount of waste (or by-products) will be generated during slaughtering and processing. production volume. These waste animal protein resources are often thrown away as garbage or piled up everywhere, which not only pollutes the surrounding environment, but also wastes a lot of resources. Livestock and poultry slaughtering waste (or by-products) mainly includes animal blood, bones, viscera, fur, hooves, etc. Among them, hair, hooves, and ...
Claims
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Application Information
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