Method and apparatus for fertigation with wastewater

This invention describes a system for mixing wastewater with fresh water to irrigate crops. It uses a single valve to combine the two water sources, and a computer controller adjusts this valve based on the electrical conductivity (EC) of the blended water. The system continuously measures the EC and adjusts the valve to maintain a target nutrient concentration for the plants.

Why it matters: Filed in 2016, the cost and integration ease of agricultural IoT sensors and microcontrollers have dramatically improved. Building this EC-feedback control system is now far more accessible and affordable for smaller-scale or custom applications.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: ModerateEC sensor, microcontroller, proportional valve

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