Zero Liquid Discharge ( ZLD )
Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld Zld