Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Urban miff


I read with interest Michael Norton's letter (NCE last week) regarding Yorkshire Water's ecological wastewater treatment system at Scrayingham and in particular his reference to 'electrical energy-thirsty variants of activated sludge.' The operating energy cost per person for a nitrifying activated sludge plant is probably less than that for a 50 watt light bulb! Also, natural treatment systems will never be appropriate for urban conurbations because of the space they require.

David Smith, regional director, Faber Maunsell, 160 Croydon Road, Beckenham, Kent BR3 4DE

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.