The first three are the certificates of New Technology for the DOF technology. And the last one is a certificate of Green Technology, which is also awarded from the Ministry of Environment.
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DOF System Capacity
DOF System Process
DOF System Technology
Expose WTP & WWTP Michigan Technology - Sidoarjo, East Java
WTP Trial Using M-DOF 50 MPD - Tandon Ciater, BSD, South Tangerang, Banten