Management and Regulation

Biosolids: Good Practice Guidance

Reference: 14/SL/11/7
ISBN: 1 84057 730 4
Published Date: 09/06/2014

This biosolids good practice guidance document is intended to provide advice and information to knowledgeable practitioners on sustainable biosolids recycling to agricultural land. The guide covers the treatment of sewage sludge to produce biosolids, the benefits associated with using biosolids in agriculture and regulatory requirements.
Following the guidance in this document will help practitioners get the most from biosolids applications to agricultural land. From a water industry perspective, the good practice guidance developed in this project will enable operators to secure a sustainable landbank and 'recover' more value from biosolids sales; helping to offset treatment, transportation and application costs.

Price: £18  

Sustainable Sludge Thickening and Treatment at Small WwTWs

Reference: 13/SL/11/6
ISBN: 1 84057 671 5
Published Date: 04/04/2013

At present, it is usual for thin sludge produced at smaller wastewater treatment works (WwTW) to receive very little treatment before being tankered to a larger WwTW for further treatment. Thus, large volumes of sludge are transported substantial distances. This is expensive and increases the overall carbon footprint of wastewater treatment.

This study investigates alternative approaches for the management of sludge produced at small WwTWs (defined as serving 25,000 population equivalent or less) which may help reduce water company costs and environmental impacts. It considers the overall technical advantages and constraints for these alternatives and provides a comparison of both relative costs (whole life costs and payback periods) and potential environmental effects (arising from transport, sludge liquors treatment, odour and greenhouse gas emissions).

The results of the study provide a framework for considering sustainable sludge management options for small WwTWs which covers technical, economic and environmental considerations.

Price: £17