Why is the surface of the fermentation bed constant for many years?

February 20, 2020

Why is the surface of the fermentation bed constant for many years?

Fermented bed pigs have very good economic and ecological benefits. Because of their many advantages, such as environmental protection, health, energy saving, grain saving, and time and labor saving, they have been welcomed by European and American international aquaculture industries and are being vigorously promoted in China. Fermentation is generally in the middle layer, and the temperature of the fermentation layer can reach 30-50°C or higher. Most reports say that the surface is constant temperature for many years, and it is stable at 20 degrees for a long time. Why?

Here's an example of a pig-spinning fermentation bed made from a starter that represents a goldfish starter. The thickness of the fermented mattress material is generally required to be 50cm. The surface layer (about 10?) is actually a protective buffer layer, and it is not fermented or the fermentation intensity is very low. The real core fermentation layer is generally less than 10cm below the surface. - 30cm pad layer, why? This is mainly due to:

(1) Contact area The large surface is in contact with the outside world, and is in great contact with the air. Therefore, a little movement of the outside world affects the surface, which is the reason that the convection is fast, the air flows fast, and the temperature and heat run fast.

(2) Occasionally, pigs urinate and defecate, resulting in the accumulation of excreta. At this time, artificially stirred, plus the pig's stepping on and turning over the arch, it also causes the surface to not warm, no heat storage, no law Fermentation.

(3) Its structure has taken into account the ventilation requirements, hot air rises, cold air enters, convection is formed, and the problem of air circulation can be solved. Therefore, the summer is not only sweltering but rather cool. When the sun is strong in the summer, you can put down the shade net and hang the skirt film around, creating a very good ventilation and cooling environment. It also controls the feeding density of pigs. The goldfish fermentation bed requires that the pig's stocking density should not be too high. Generally, 1.2 to 1.5 m2 per pig is appropriate, and piglets can be appropriately increased in density. Therefore, the worry that summer temperature is too high is superfluous. The surface temperature is stable at 20°C for a long period of time, basically forming a thermostatic bed.

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