Full-automatic aerobic composting test equipment

Abstract

Full-automatic aerobic composting test equipment comprises a fermentation tank, an intermittent aeration system and a control system, wherein a tail gas outlet is arranged on a fermentation tank cover, gas collection tanks are connected behind the tail gas outlet, upper, middle and lower layers of sampling and temperature ports as well as a discharge port are formed in side walls of the fermentation tank, a waste liquor outlet is arranged on the tank bottom, and a T-shaped gas distribution device is arranged in the fermentation tank; the intermittent aeration system comprises an air storage tank connected with an air pump; an air heater, a solenoid valve and a gas flowmeter are sequentially arranged on an air discharge pipeline of the air storage tank; and the control system comprises a pile temperature sensor and an environment temperature sensor which are connected to a PLC (programmable logic controller) module through a temperature module, and an output control signal of the PLC module is connected with the solenoid valve. According to the test equipment, even aeration of a pile can be guaranteed, the needed external air pressure is small, and the pile heat emission and the power consumption are less; the aeration flow, the aeration temperature, the aeration interval and the aeration duration are controlled automatically, and temperature data are recorded automatically; and stratified sampling can be performed and samples are even.

Description

technical field [0001] The invention relates to a laboratory composting device, in particular to a fully automatic aerobic composting test equipment. Background technique [0002] Aerobic composting is the main and effective way to realize the harmless and resourceful use of organic waste. With the development of intensive breeding industry, livestock and poultry manure from large-scale farms has become the main source of livestock and poultry manure. Large-scale farm waste contains many problems such as antibiotics and heavy metals. Research on the impact of antibiotics and heavy metals on the aerobic composting process is of great significance for the harmless treatment and resource utilization of aquaculture waste. [0003] Large-scale composting experiments occupy a large area, the composting parameters are not easy to control, and composting management (aeration, turning, etc.) is inconvenient, which is not conducive to the study of the composting process. Composting ...

AI Technical Summary

Problems solved by technology

Most of the laboratory-scale aerobic composting devices currently on the market have poor thermal insulation effects and can only be used when the ambient temperature is high; there are also some fermenters that use constant temperature water baths for thermal insulation, but the cost is high, energy consumption is large, and it does not meet the actual composting conditions.

Existing laboratory-scale aerobic composting devices mostly use continuous aeration or mechanical turning to supply air to the heap. The heat generated by continuous aeration is large, which is not conducive to the heating and heat preservation of the heap, and affects the effect of killing pathogenic microorganisms. The continuous operation of the pump consumes a lot of energy, and the service life of the air pump is reduced; mechanical turning will cause bioaerosol (bioaerosol) to be emitted in the air, causing secondary pollution, and the automatic mechanical turning device also greatly increases the cost and energy consumption of the fermentation tank. inconvenient

In addition, most fermenters do not consider the sampling problem during the composting test, and cannot carry out stratified sampling, and there are problems such as inconvenient and uneven sampling

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