The Project Outline

The Odour Improvement Plan approved by City of Edinburgh Council involves the delivery of significant capital works at the Seafield WWTW, aimed at building on the investment already made at the treatment plant, targeting those areas of the plant that contribute the most to odour emissions from the site.

What we're doing

There are two main areas to the Seafield Odour Improvement Project:

Odour improvement work

This covers areas of the plant that represent the primary sources of odour, extracting the air, treating the air using a number of Odour Control Units (OCUs), and finally discharging the cleaned air through stacks.

Preliminary treatment improvement works

This is a significant upgrade to preliminary treatment works, that remove much of the debris and grit as the sewage flows enter the plant, which would otherwise reduce the performance of the plant downstream (including the potential to produce odour). 

This work is needed to improve the ability of the inlet works to cope with the much larger quantities of debris that are transferred to the plant during the “first flush” in heavy rain or storm conditions.