Activated Sludge Process Control: F/M Ratio and SVI Troubleshooting
The activated sludge process remains the workhorse of biological wastewater treatment, but it is notoriously sensitive to operating conditions. Two parameters—the…
14 articles
The activated sludge process remains the workhorse of biological wastewater treatment, but it is notoriously sensitive to operating conditions. Two parameters—the…
Knowing the right pipe size without a calculator is a skill that separates experienced engineers from the rest. Here's how to do it in your head. --- The Rule For liquid in carbon…
In December 2024, I watched a project manager present a budget to his board. He had a 15-slide deck, detailed cash flow projections, and a Gantt chart that fit on one page. The…
!cover(covers/wastewater-bio.jpg) Biological treatment can reduce your wastewater COD by 90% at a fraction of the cost of chemical oxidation. Or it can be a complete disaster that…
Every environmental engineer eventually designs a wet scrubber. Whether it's for acid gas removal (HCl, SO₂, HF), particulate control, or odor abatement, the fundamental design…
Before you design a wastewater treatment plant on that "brownfield" parcel, before you expand your factory onto the adjacent lot, before you acquire a manufacturing facility — you…
A dust collection system that doesn't capture dust at the source is just an expensive fan moving dirty air around the workshop. The hard part isn't sizing the fan or the…
The A²O process—Anaerobic-Anoxic-Oxic—is the most widely deployed biological nutrient removal (BNR) configuration in the world. It removes organic carbon, nitrogen, and phosphorus…
An MBR (Membrane Bioreactor) gives you the best effluent quality of any biological treatment process—consistently <5 mg/L TSS, <1 NTU turbidity, and 4-6 log pathogen removal. But…
If you're hauling wet sludge off-site, every percentage point of moisture content above 60% is money you're paying to truck water. A plant dewatering 10 tonnes/day of dry solids…
A chemical plant in Jiangsu replaced their activated carbon beds every 3 months. The vendor said it was "normal." It wasn't. The EBCT was 18 seconds — less than a third of what it…
Every industrial wastewater treatment engineer has faced the same problem: COD that won't budge below 500 mg/L after biological treatment. The usual suspects — textile dyes,…
!Industrial water treatment(https://images.unsplash.com/photo-1581578731548-c64695cc6952?w=800) Zero liquid discharge sounds like the ultimate environmental solution: your plant…
If you generate sludge — and every industrial wastewater treatment plant does — you have to dewater it. Wet sludge costs money to dispose of. In many cases, it's the single…