WATER & WASTEWATER · BANGLADESH
Water, engineering, and lessons from the field
I’m Arif Anwar, a water and wastewater engineer based in Bangladesh. My experience spans industrial treatment, water reuse, project delivery, and technical training.
This is where I write about how treatment plants behave after commissioning, what it takes to keep them running, and what those lessons can teach us about engineering judgment. I also write about research and professional growth.
Chapter 1. Effluent Treatment Plant (ETP)
Ten illustrated lessons on treatment flow, shift work, equipment, sampling, and troubleshooting.
Browse the illustrated lessons
1.1 Operations · 1.2 Maintenance · 1.3 Inspection · 1.4 Troubleshooting
Interactive Hilsa research
Follow hilsa from the Bay of Bengal into the Meghna estuary and compare how seasonal conditions and habitat management affect the model. Explore Hilsa — The Living Estuary
Interview preparation series
Questions and sample answers for plant operations, management, and environmental compliance roles in Bangladesh.
PART 01
ETP, RO & WTP Operator Interview Questions
Shift checks, process basics, RO readings, and what to do when something goes wrong.
PART 02
ETP In-Charge & ETP/WTP Manager Interview Questions
Plant performance, troubleshooting, costs, team management, and operating decisions.
PART 03
ECR Officer & Environmental Compliance Interview Questions
ECR 2023, clearance, sampling, reporting, audits, and how to handle an exceedance.
Start with this field note
The Day a Treatment Plant Really Starts
A commissioning test shows what a plant can do under a set of conditions. What happens on the next shift tells us something different.