SLIDE 1
Agenda
- Review and actions of previous minutes
- Operations and communications
- Odournet report
- Mosquito survey results
- AOB
Mogden Sewage Treatment Works Residents Meeting 4 February 2014 - - PowerPoint PPT Presentation
Mogden Sewage Treatment Works Residents Meeting 4 February 2014 - - PowerPoint PPT Presentation
Mogden Sewage Treatment Works Residents Meeting 4 February 2014 Agenda Review and actions of previous minutes Operations and communications Odournet report Mosquito survey results AOB Operations and communications
SLIDE 2
SLIDE 3
Operations and communications
Update
- Following the completion of the extension last year, Battery E
had to be ‘run in’. This has been completed and the extra plant is fully optimised since November.
- The Odournet olfactometry report has been received and
shared with the London Borough of Hounslow.
- The next Modgen Update newsletter including the mosquito
awareness campaign is being prepared to be sent out in April.
SLIDE 4
Operational correspondence
10 20 30 40 50 60 70 80 90 100 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12 May-12 Jun-12 Jul-12 Aug-12 Sep-12 Oct-12 Nov-12 Dec-12 Jan-13 Feb-13 Mar-13 Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14
LBH Other Mosquitoes Odour and mosquitoes Odour
SLIDE 5
Odournet report
Summary
- Overall, the report considers Mogden to be within the normal
- perating parameters for a process of this type and size.
- However the results show a higher level of odour than
anticipated in our planning application.
- We have put together an action plan to address the specific
issues identified by Odournet – some of these activities were already in progress before their report was received.
SLIDE 6
Odournet report
Recommendation 1
Replace the carbon in the East Side, West Side and Sludge Thickening Odour Control Units (OCUs) We had already started the process of replacing the carbon media due to the life expectancy of the media. It is important to note, however, that the OCUs are still operating within the Odour Management Plan’s trigger levels.
SLIDE 7
Odournet report
Recommendation 2
Confirm that the current odour abatement performance of the Inlet PS OCU has improved to levels indicated by recent hydrogen sulphide monitoring data We consider the measurements obtained by Odournet during their survey to be unrepresentative of the normal performance of this unit. Our weekly monitoring showed that the unit was performing as expected shortly after, but this will be confirmed in Odournet’s follow up survey.
SLIDE 8
Odournet report
Recommendation 3
Install a scum suppression system in the anoxic zone of Bank E to eliminate scum formation The accumulation of scum in the new activated sludge plant was not anticipated. Therefore, an automated spray system is to be installed to break-up the scum. The procurement of the equipment has started and the project is expected to be finished by the end of April 2014. In the meantime, the tanks are being manually hosed on a regular basis.
SLIDE 9
Odournet report
Recommendation 4
Review the operational procedures around the storm channels to reduce retention of storm water in between storm events The operational procedures for the management of the storm tanks have been revisited as part of the six-monthly OMP review, and discussed with the London Borough of Hounslow. In summary, the storm tank feed channels will continue to be the subject of daily inspections, but their status will now be recorded
- n the daily storm tank check sheets.
SLIDE 10
Mosquito survey results
Number of sites surveyed
50 100 150 200 250 300 350 400 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 Number of sites Week
2010 2011 2012 2013 2014
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Mosquito survey results
Sites with any activity
5 10 15 20 25 30 35 40 45 50 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 % of sites with any activity . Week
2010 2011 2012 2013 2014
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Mosquito survey results
Sites with any adults
5 10 15 20 25 30 35 40 45 50 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 % of sites with activity . Week
2010 2011 2012 2013 2014
SLIDE 13
Mosquito survey results
Sites with many adults
2 4 6 8 10 12 14 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 % of sites with activity . Week
2010 2011 2012 2013 2014
SLIDE 14
Mosquito survey results
Sites with larvae
2 4 6 8 10 12 14 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 % of sites with activity . Week
2010 2011 2012 2013 2014
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AOB
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Proposed dates of future meetings
- Wednesday 4 June 2014
- Wednesday 8 October 2014
- Wednesday 4 February 2015
SLIDE 17