Zero Liquid Discharge (ZLD): A comprehensive wastewater treatment engineering cycle where all effluent wastewater is treated, purified, and internal streams/rejects are recycled across all plant operations.
Ultimate Goal: Eliminates the discharge of any liquid effluent into the surrounding environment, reducing effluent volume to dry solid salts while conserving fresh water intake.
Correct option: (2) The reject is recycled from every part of the treatment plant
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