Project: Scoping and design of biological effluent treatment plant
Site: Bilsthorpe, Derbyshire
Client: Deans Foods
When:  2006

Deans Foods are a major egg processor. Treatment of the trade effluent with an existing DAF (Dissolved Air Floatation) plant did not meet the sewer discharge consent limits due to the high level of soluble COD.

WEBS undertook a process audit and recommended full biological treatment using a SAF (Submerged Aerated Filter) plant. Tertiary nitrification was included in the design as an ammonia limit would be imposed if an on-site biological treatment was installed.

WEBS provided a system design for the SAF plant, which was installed by CAP Technology within budget and on schedule. The plant has been operational for a year and has easily met all of the consent limits. Prior to the installation of the permanent SAF plant, two temporary SAF plants were rented to Deans to ensure consent compliance during the build phase of the project.

Project: Design and Commission of BNR Plant
Site: Llangefni, Anglesey
Client:  Welsh Water
When: 2001

The wastewater treatment plant of Dwr Cymru, at Llangefni, had a very tight ammonia and phosphate limit imposed by the Environment Agency as part of their review of the environment quality of the receiving watercourse.

A process review was undertaken by WEBS and the most cost effective alternative proved to be a BNR (Biological Nutrient Removal) plant. WEBS provided a system design for a full BNR plant, which has now been constructed by MEICA Process and commissioned by WEBS. The plant has been operational for the past 5 years and has consistently met all of the consent limits.

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