WATER & WASTEWATER · BANGLADESH
Water and wastewater engineering in practice
I’m Arif Anwar (Ochin), a water and wastewater engineer in Bangladesh. I write about commissioning, operating, and improving industrial treatment plants, drawing on work in water reuse, project delivery, and technical training.
Plant operations and field notes
Excel for ETP and WTP O&M
Practice shift logs, COD calculations, dashboards, and maintenance follow-up using sample plant data.
ETP Operations, Maintenance, Inspection & Troubleshooting
Ten illustrated lessons on treatment flow, shift work, equipment, sampling, and troubleshooting.
The Day a Treatment Plant Really Starts
What the first operating shifts teach us after commissioning.
Interview preparation
Questions and sample answers for plant and environmental roles in Bangladesh.
ETP, RO & WTP Operator
Shift checks, process basics, and RO readings.
In-Charge & Manager
Plant performance, troubleshooting, costs, and teams.
ECR Officer & Compliance
Clearance, sampling, reporting, and responding to an exceedance.
Selected work and research
Selected Work
Engineering experience in industrial treatment, project delivery, and water reuse.
Hilsa — The Living Estuary
An interactive model of hilsa migration between the Bay of Bengal and the Meghna estuary.
Explore the site
About Me
Meet Arif Anwar (Ochin), a water and wastewater engineer and technical writer in Bangladesh.
Field Notes
Browse practical guides and lessons from industrial treatment plants.
Contact
Get in touch about the blog, technical questions, or feedback.