| Abstract Title: | IMPROVED AMMONIUM CONTROL AND ENERGY SAVINGS IN ACTIVATED SLUDGE PLANTS |
| Presenter Name: | Mr James Chapman |
| Company/Organisation: | Hach UK |
| Country: | United Kingdom |
Abstract Information :
Thames Waters Beckton STW in East London is one of Europes largest wastewater plants, treating an average flow of 1,150,000 m3d. It was identified that one section, ASP4, treating 30 of the sites flow had issues, despite the fact that with 7.5 m deep aeration tanks and variable speed aeration blowers this should have been the most efficient plant out of the three ASPs on site. Part of the improvement stage involved installing HACHs N-RTC, measuring inlet and outlet ammonium concentrationsrnand ensuring that the permit conditions were being met at least cost. After implementation it was found that D.O. levels were controlled more precisely and efficiently as each individual zone has its own motorised air valve and associated D.O. probe. Following the installation amp; commissioning of the RTC, the ammonium removal rate was improved to 3.8 kwhrkg representing an overall saving of 28, which equates to savings of approximately 0.5 million per annum and importantly a project payback period of just over 1 year.
