Abstract
Abstract A major concern in the home water purifying systems is the wastage of water. A normal Reverse Osmosis (R.O) water purifier rejects approximately 75% of the input water. The rejected water contains high level of dissolved impurities which cannot be used for dailyuses. The reason being this water having high Total Dissolved Salts (TDS). Contrary to popular belief, this water cannot be used for irrigation purposes for all plants without removing the contaminants. In the present project, the main aim is to find a way for using the above-said high TDS water in a sustainable way. So, the rejected water is sent into a water harvesting pit in which plants are grown. These plants are phyto-remediating plants. Phyto-remediation is the process of using various types of plants to remove, transfer, stabilize, and/or destroy contaminants in the soil and groundwater. For this purpose, a complete plant care unit is prepared with a system of sensors, actuator and a controller to maintain the growth requirements of the plant based on the necessity. This Automatic Plant Care (APC) unit consists of water rejected from RO purifier, receiver tank, water pump, water harvesting pit, Digital Humidity and Temperature (DHT) sensor, Light Dependent Resistor (LDR), Node Micro Controller Unit (Node MCU) controller or Arduino board and Perf board.
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