System used for pretreating crop straw

Abstract

The invention provides a system used for pretreating crop straw. The system used for pretreating the crop straw comprises a reaction container, and the reaction container comprises a container body; aheat exchange clamping cover covers the outer wall of the container body; an alkali liquor delivering pipe is arranged in the container body. By means of the system, a combination method is adopted to pretreat the straw, that is, repeated freeze thawing and alkali liquor soaking are integrated, two treating units are utilized in the same container, namely in-situ treating, the migration process of treating liquid in different treating units is omitted, the time and space are saved, and thus the pretreating efficiency is improved.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a system for pretreatment of crop stalks. Background technique [0002] With the rapid development of modern animal husbandry, livestock and poultry feed has become the top priority of the aquaculture industry. The limited development of traditional feed with corn and other aged grains as raw materials has become the main factor restricting the development of animal husbandry. The use of unconventional feed in China is expected to alleviate the pressure on feed grain, and at the same time improve and protect the ecological environment. Therefore, the development of unconventional feed conversion of crops in our country will have significant economic and ecological benefits. The lignocellulose rich in crops must be degraded into fermentable sugars before it can be further efficiently converted into livestock and poultry feed. However, the production of livestock and poultry feed by ...

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Problems solved by technology

[0003] Every single preprocessing method has its limitations

For example, physical methods such as hydrothermal treatment, freeze-thaw treatment, and electron beam irradiation treatment have disadvantages such as small processing capacity and high cost.

Dilute acid treatment can achieve a certain effect, but the acid has a corrosive effect on the reaction vessel, and the addition of the reaction reagent will also cause pollution to the reaction raw materials

Although the oxidant can remove lignin and most of the hemicellulose in the lignocellulosic raw material, and the hydrolysis yield of cellulose is also high, but the consumption of oxidant is large, resulting in high cost

Although biological methods can efficiently decompose lignin in plant fibers to remove its wrapping effect on cellulose and improve the accessibility and activity of cellulose, but currently there are few types of microorganisms that can degrade lignin and the treatment time is long , low enzymatic activity of lignin decomposing enzymes, and the use of genetic engineering technology to improve white rot fungi and other technical problems, all of which limit the practical application space of biological methods

[0004] In summary, it is difficult to achieve the desired effect when using a single method to pretreat lignocellulosic raw materials. Generally, it is necessary to effectively combine different methods in order to obtain a more economical, environmentally friendly and efficient combined pretreatment method. Therefore, the combined method is based on Its high comprehensive economic benefits have been widely promoted

However, the current system used in the joint method is only to connect the equipment used in different treatment methods in series. The series connection is connected according to the predetermined treatment sequence. Although the system improves the hydrolysis yield of cellulose, it reduces the production efficiency.

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