Detlef got your message below. I am not sure of the context and what DHS means.

Regards
Seamus

MESSAGE:

Dear Seamus,
Would it be necessary to have like the DHS a permanent air supply to this enclosed reactor to strip Methane out of the effluent?
What do you think?
Thanks,
Detlef

Detlef,

Thanks again for all your help this information could be very useful.

Kind Regards
Seamus Kelly

Bauer's Tom Headley, was able to answer some of my question:

...The system consists of two parallel ABR tanks followed by a set of 6 aerated horizontal subsurface flow wetland cells (each one about 4000 m2). Additional treatment is provided by 2 x Bauxite Residue Filters (4000 m2 each) [for disinfection].
There is no reuse of the biogas in this case.

At the Alcoa Technology Centre in Pittsburgh, USA they also have an ABR + aerated wetland system [for their cold climatic condition] for treating the sewage from the facility. ...

maybe the location? : goo.gl/maps/tb0RU

FYI: I was only able to filter just some technical information from the company advertisements:

- Seeing the very small long section pictures, after the ABR it looks like an aerated horizontal flow Constructed Wetlands ( Actively aerated treatment wetland system , and a down-stream filter with bauxite gravel for final polishing.

www.alcoa.com/sustainability/en/case_stu...gineered_wetland.asp


- No information found about use of biogas from the ABR.
- Seeing the large picture, probably the municipal wastewater being transported by larger tankers (honey-sucker) to the ABR of wwtp.

The wetland system been engineered since May 2013 by BAUER Resources GmbH: www.bauer.de/en/bre/index.html and ABR by others?

Alcoa’s Natural Engineered Wastewater Treatment system comprises three steps: (1) an anaerobic treatment tank that removes metals and breaks down and separates organic material in the water; (2) a passive engineered wetland that utilizes vegetation for further treatment of organics and removal of nitrogen; and (3) a cell housing bauxite-based technology that disinfects and polishes the water. The result is water treated to the same or better quality as that of a conventional system.

www.alcoa.com/global/en/news/news_detail...0178en&newsYear=2013