Abstract
Objectives: To improve the quality of the product, an automatic control of temperature, humidity and irrigation was designed for a greenhouse. Methods/Analysis: This paper describes the sensors, actuators, controllers, control algorithms and software that make it possible to know and maintain within an optimal range environmental variables of temperature and humidity inside the room fruiting; as well as substrate moisture feeding the fungus. Findings: As a result, a simulation of the designed system was obtained by a software supervisory control and data acquisition. Improvements: It was concluded that the proposed system is the ability to monitor and control environmental variables, described it above, in the greenhouse of eatable mushroom Orellana; and to adjust variables to a window it was verified that is sufficient control “on/ off”. Keywords: Control, Greenhouse, Humidity, Pleurotus Ostreatus, Temperature, Supervision-Control And Data Acquisition (SCADA)
Highlights
The production of Orellana (Figure 1), fungus similar to mushroom but in the form of an oyster, which contains all the essential amino acids, carbohydrates, phosphorus, potassium, zinc, copper, magnesium, vitamins A, B, B12, C, D and niacin, it has antitumor, antiviral and cholesterol control effects[1], it is attractive since the substrate, food of the fungus, is mainly made of cheap and easy to obtain residues such as wood, husks and cereal straws[2]; in addition, Orellana is a fungus of great colonization capacity, which requires less energy to eliminate probable contaminants
Temperature, Humidity and Irrigation Control System for the Production of Orellana Edible Mushroom in a Greenhouse productivity of the crop has been very low since with 25 gallons of substrate (100 Kg approximately) and 2 Kg of mycelium an average of 5 Kg of Orellana per week should be harvested for a month[5], but the maximum that has been obtained are 2.5 Kg per week
This paper describes in detail the system for the control of the environmental variables of temperature, humidity and irrigation of the substrate in a fructification greenhouse of the edible Orellana fungus produced in the city of Bogotá, where the first three levels were covered in the automation pyramid, that is, field devices, control (Programmable Logic Controller (PLC)) and supervision (SCADA system)
Summary
The production of Orellana (Figure 1), fungus similar to mushroom but in the form of an oyster, which contains all the essential amino acids, carbohydrates, phosphorus, potassium, zinc, copper, magnesium, vitamins A, B, B12, C, D and niacin, it has antitumor, antiviral and cholesterol control effects[1], it is attractive since the substrate, food of the fungus, is mainly made of cheap and easy to obtain residues such as wood, husks and cereal straws[2]; in addition, Orellana is a fungus of great colonization capacity, which requires less energy to eliminate probable contaminants. This problem is generated by the great variability of the environmental and irrigation conditions of the crop room, mainly due to the fact that the temperature and humidity are not automatically controlled and the irrigation of the substrate is done manually according to the operator’s judgment; for example, an excess of moisture limits the supply of oxygen to the fungus and decreases its growth. This paper describes in detail the system for the control of the environmental variables of temperature, humidity and irrigation of the substrate in a fructification greenhouse of the edible Orellana fungus produced in the city of Bogotá, where the first three levels were covered in the automation pyramid, that is, field devices (sensors and actuators), control (Programmable Logic Controller (PLC)) and supervision (SCADA system)
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