1. BS EN 12255-6. Wastewater treatment plants. Part 6. Activated sludge process (10th June 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (64 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. BS EN 12255-8. Wastewater treatment plants. Part 8. Sludge treatment and storage (10th February 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (45 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Code of practice for design and installation of small sewage treatment works and cesspools. (29th April 1983) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (50 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Tracked Changes. Wastewater treatment plants. Activated sludge process Part 6, (1st August 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (146 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗