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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 practical tools

ETP Operations, Maintenance, Inspection & Troubleshooting

Follow ten illustrated lessons from treatment flow to troubleshooting.

Excel for ETP and WTP O&M

Practice with downloadable workbooks, dashboards, and checklists.

Treatment Plant Handover

What the first operating shifts teach us after commissioning.

Environmental compliance and reference documents

ECR 2023 Downloads and Practical Guide

English translation, original Bangla gazette, and the checks that matter to plant teams.

Interview preparation

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 environmental judgment.

Water, cities and living rivers

Diabari Waterlogging and Solid Waste Management

Why drains, wetlands, and waste collection belong in one plan. Practical steps for reducing waterlogging in Diabari and other growing neighborhoods.

Diabari Wetlands, Drainage and Habitat Protection

Read historical imagery and local records to understand Diabari’s wetlands, drainage connections, and options for protecting habitat as the area develops.

Turag River Environmental Flow and Seasonal Change

Explore Turag environmental-flow evidence and a 20-year GEOGLOWS comparison. Learn why the river reach, season, and assessment method change the answer.

Hilsa — The Living Estuary

Explore the interactive migration and habitat model.

Solar energy in practice

Rooftop Solar Performance in Bangladesh

Compare four rooftop solar installations using generation, specific yield, season, and weather. Learn what the figures mean for practical O&M.

Rooftop Solar for Apartment Common Services

Plan solar for apartment lifts, pumps, and common lighting. Compare grid-connected and battery options using measured demand and transparent energy calculations.