Anaerobic digesters and biogas: wastewater treatment plants in Alabama
14 plants · 5% of the state · 158 MGD combined
Klarifi identifies 14 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Alabama, 5% of the 257 plants in the state (158 MGD combined). The largest is Valley Creek Wastewater Treatment Plant in Bessemer at 37.73 MGD.
Anaerobic digesters stabilise sludge in sealed heated tanks and produce biogas, visible from the air as digester silos and gas holders. Plants with digesters are typically above 5 MGD and are the buyers of mixing, heating, gas handling, cogeneration and dewatering equipment.
The largest plants with anaerobic digesters in Alabama
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Valley Creek Wastewater Treatment Plant | Bessemer | 37.73 | ALL023655 | Dec 2030 | 1 |
| 2 | Village Creek WWTP | Birmingham | 24.6 | ALL023647 | Dec 2030 | 6 |
| 3 | Clifton C. Williams Wastewater Treatment Facility | Mobile | 19.38 | AL0023086 | Jun 2025 | 60 |
| 4 | Tuscaloosa WWTP | Tuscaloosa | 18.58 | AL0022713 | Feb 2028 | 99 |
| 5 | Montgomery Enconchate WWTP | Montgomery | 12.66 | AL0022225 | May 2031 | 1 |
| 6 | Wright Smith Jr Wastewater Treatment Facility | Mobile | 8.31 | AL0023094 | Nov 2018 | 6 |
| 7 | Albertville Waste Water Treatment Plant | Albertville | 7.76 | AL0020192 | Apr 2027 | 21 |
| 8 | Cypress Creek WWTP | Florence | 6.86 | AL0023884 | Dec 2026 | 4 |
| 9 | Gadsden West River WWTP | Gadsden | 6.1 | AL0053201 | Jul 2030 | 40 |
| 10 | Aldridge Creek Wastewater Treatment Plant | Huntsville | 4.97 | AL0056855 | Feb 2027 | 0 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Alabama
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in Alabama: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: Anaerobic digester · Biosolids · Sludge dewatering · Centrate · Ozonation · Activated sludge · all terms