Method and installation for ventilating and controlling a biological dehydration and stabilization treatment of a moist fermentable organic product
OwnerMaurice Tempeinventor
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Abstract
This generally concerns the treatment of a moist fermentable organic product (10) involving circulation of air through the product controlled in accordance with the value of a parameter related to its state. In accordance with the invention, the measured value of the parameter concerned is compared with a specific value programmed in advance and regarded as ideal for the current air flowrate and this air flowrate is modified if the measured value of this parameter departs from this ideal value.
Claims23
Method for ventilating and controlling biological dehydration and stabilization treatment of a moist fermentable organic product or products comprising the steps of:
- loading a reactor with a heap of the product or products to be treated;
- applying suction or aspiration from beneath the heap to cause a flow of air through the heap at a desired flow rate;
- measuring the temperature of air exhausted from the heap by expansion and contraction of a liquid having a high coefficient of thermal expansion;
- programming a theoretical exhaust air temperature as a function of airflow rate;
- comparing the theoretical value of the exhaust air temperature with a monitored exhaust air temperature and determining the deviation;
- adjusting the exhaust airflow rate in response to the expansion or contraction of the liquid in such a manner that the monitored exhaust air temperature tends to reduce the magnitude of the deviation;
- and
- thereby allowing fermentation while progressively reducing moisture from the product or products.
Method for ventilating and controlling biological dehydration and stabilization treatment of a moist fermentable organic product or products comprising the steps of:
- loading a reactor with a heap of the product or products to be treated;
- applying suction or aspiration from beneath the heap to cause a flow of air through the heap at a desired flow rate;
- measuring the temperature of air exhausted from the heap;
- programming a theoretical exhaust air temperature as a function of airflow rate;
- comparing the theoretical value of the exhaust air temperature with a monitored exhaust air temperature and determining the deviation;
- adjusting the airflow rate in such a manner that the monitored exhaust air temperature tends to reduce the magnitude of the deviation;
- thereby allowing fermentation while progressively reducing moisture from the product or products;
- linearly varying the airflow rate after a predetermined initial period on the order of one week.
Apparatus for ventilating and controlling biological dehydration and stabilization treatment of a moist fermentable organic product or products comprising:
- a reactor for containing a heap of a product or products to be treated;
- means for applying suction or aspiration from at the base of the reactor and beneath the heap to cause a flow of air through the heap at a desired flow rate comprising a perforated network at the bottom of the reactor for the flow of air, and at least one primary feed-pipe connectable to the perforated network;
- means for measuring the temperature of air exhausted from the heap comprising a thermal sensing means having a variable volume and containing a liquid with a high coefficient of thermal expansion and a mobile wall responsive to the expansion and contraction of the liquid;
- a program of ideal theoretical airflow rate as a function of the measured exhaust air temperature;
- means for comparing the theoretical value of the exhausted air temperature with a monitored exhaust air temperature and determining the deviation;
- means for controlling the exhaust airflow rate in such a manner that the monitored exhaust air temperature tends to reduce the magnitude of the deviation, said means for controlling the exhaust airflow rate comprising a control valve having a control member coupled to the mobile wall;
- and
- thereby allowing fermentation while progressively reducing moisture from the product or products.
Dependencies are inferred from the claim text.