Semi-automatic control method of feedback ventilation temperature in producing aerobic compost

Abstract

The present invention is the semi-automatic control method of feedback ventilation temperature in producing aerobic compost in the compost temperature controlling technology. The semi-automatic control technology of feedback ventilation temperature combining automatic control and manual control is to control the compost center temperature in 70-75 deg.c and 55-65 deg.c in different stages. The said method can kill pathogenic bacteria, maintain optimized compost degradation and water elimination, maintain the set temperature through manually controlling the blower in the late stage for speeding fermentation and shortening processing period, lower power consumption, and realize harmless compost production.

Description

technical field [0001] The invention belongs to the technical scope of compost temperature control ventilation, and in particular relates to a semi-automatic control method for aerobic compost temperature feedback ventilation. Background technique [0002] Composting is one way to deal with the growing volume of solid waste. There are two main goals of composting: harmless and resourceful. Harmless refers to the killing of pathogenic bacteria through composting, and recycling refers to the rapid degradation, humification and rapid removal of excess water through composting substrates, so as to obtain good organic fertilizers. Therefore, in the composting process, the control objectives of the compost at different stages are different: (1) Harmless: In the composting stage 1, there are many substrates that are easily degraded in the composting process. Degradation, the temperature of the pile body also rises rapidly, by controlling the temperature of the pile body at a high...

AI Technical Summary

Problems solved by technology

Traditional composting mainly adopts the composting method. Due to the lack of effective control of the composting process, the composting cycle is long and the labor intensity is high, which cannot meet the increasing requirements of solid waste treatment.

The engineering application of compost temperature feedback ventilation automatic control has a history of more than 20 years abroad, but there are not many applications in our country at present

In the patent No. 00105833.9 and the patent No. 01120522.9, the instrument control and computer control of composting automatic control are reported respectively, wherein the instrument control is simple and practical, the price is lower, and the maintenance is also more convenient, but it can only control one heap body at a time; the computer control system Complicated, expensive, maintenance requires a high level of technology, and can control multiple stacks

At present, there are few applications of compost temperature feedback ventilation control in my country, and most of them are one-stage control, that is, the central temperature of the compost body is controlled at 55°C to 60°C during compost ventilation, and the fan blows continuously when the temperature exceeds 55°C to 60°C. When the temperature is lower than 55°C to 60°C, fan intermittent ventilation at fixed time intervals is used. This method has two defects: first, when the temperature control pile center is 55°C to 60°C, the temperature of the lower layer cannot reach 55°C. ℃, the effect of killing pathogenic bacteria is poor; second, when the temperature is lower than 55℃~60℃, a fixed ventilation rate is used, which makes it difficult to control the temperature of the compost at 55℃~60℃ in the later stage of composting. Lower temperature, lower water removal and substrate degradation capabilities

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