How To Control The Temperature Of Organic Compost To Make Good Fertilizer?
In the composting process, with the intensification of microbial activity in the material, the heat released by the decomposition of organic matter by microorganisms is greater than the heat time of composting, and the composting temperature rises. Therefore, temperature is the best parameter to judge the intensity of microbial activity.
How is the temperature controlled during the composting of livestock and poultry manure?
What is the temperature in composting process? The role of temperature is mainly to affect the growth of microorganisms, it is generally believed that the degradation efficiency of high temperature bacteria on organic matter is higher than that of medium temperature bacteria, today’s rapid, high temperature aerobic compost is using this feature, in the early stage of composting, the temperature of the compost is generally similar to the ambient temperature, after the role of the medium temperature bacteria 1 ~ 2d, the composting temperature can reach the ideal temperature of the high temperature bacteria 50 ~ 65 ° C, according to this temperature, the general compost 5 ~ 6d, you can complete the harmless process. Therefore, in the composting process, the temperature of the compost body should be controlled between 50 and 65 ° C, but it is better at 55 ~ 65 ° C, and it is not easy to exceed 60 ° C. When the temperature exceeds 60 °C, the growth activity of microorganisms begins to be inhibited.
Excessive temperatures can over-consume organic matter and reduce the quality of compost products. In order to achieve the effect of killing pathogens, for the industrial composter machine (reactor system) and static ventilation stack system, the time when the internal temperature of the reactor is greater than 55 ° C must be 3d. For the bar stack system, the internal temperature of the stack is greater than 55 °C for at least 15 d and at least 3 d during operation. For the bar stack system, the internal temperature of the stack is greater than 55 °C for at least 15 days, and the pile is turned over at least 5 times during animal manure processing.
Based on the plotted conventional compost temperature change curve, the compose making process of manure can be judged. If the temperature deviation from the conventional temperature curve is measured, it indicates that the activity of microorganisms is disturbed or hindered by some factors, and the conventional influencing factors are mainly oxygen supply and garbage moisture content.
In general, in the initial 3 to 5d of composting, the main purpose of ventilation is to meet the supply of oxygen, so that the biochemical reaction can proceed smoothly, and the purpose of increasing the temperature of the reactor has been achieved. When the compost temperature rises to 80 ~ 90 ° C, this will seriously affect the growth and reproduction of microorganisms, so it is necessary to increase the amount of ventilation to take away the water and heat in the reactor with a compact composting machine, so that the reactor temperature drops.
In the production process of organic fertilizer, often through the temperature – gas supply feedback system to complete the automatic control of the temperature, by installing a temperature feedback system in the reactor, when the internal temperature of the reactor exceeds 60 ° C, the fan automatically begins to send air to the auto composting tank , thereby discharging the heat and water vapor in the reactor, so that the reactor temperature is reduced.
For strip stack compost without ventilation system, the pile is turned over regularly to achieve ventilation and temperature control. If the operation is normal and the reactor temperature continues to drop, it can be determined that the compost has entered the cooling stage before the end.