The Projects we are running to address the Big Questions generate outcomes that Companies use to guide and inform decisions. Here we present an example:
BQ5 - How will we deliver an environmentally sustainable wastewater service that meets customer and regulator expectations by 2050?
A case study from:
Phosphorus is an essential element for all life and is widely recognised as a key factor influencing the status of river and lake ecosystems. Much past research and monitoring work in these ecosystems has
focussed on an individual fraction of the total phosphorus pool, operationally termed soluble reactive phosphorus. However, an extremely wide range of non-soluble reactive forms of phosphorus may exist
in freshwaters. Therefore, the objectives of this project were to:
To address these objectives, a literature review was undertaken to assess current state of research and semi-structured interviews were conducted by staff from Lancaster University with 12 experts drawn
from a range of research specialisms and organisations.
The water industry is currently investing heavily in phosphorus removal from wastewater to protect the water environment. This investment is regulated using limits of total phosphorus concentrations in final effluent. There were concerns that regulation by total phosphorus would deliver over-treatment, and that soluble reactive phosphorus would deliver the required environmental protection at reduced cost to customers. The conclusions of rapid cycling of non-soluble reactive phosphorus between fractions, and potential bioavailability of almost all forms of phosphorus, improved confidence in regulation by total phosphorus limits. This confidence does, however, remain open to challenge due to uncertainty around the actual ecological impacts of non-soluble reactive forms of phosphorus in natural ecosystems.
Matt Hill, on the project steering group for Yorkshire Water, said, ‘Investment of customers’ money in environmental protection must be driven by the best information available. The project gave the water industry the most up to date information possible on the suitability of total phosphorus limits to regulate that investment. Although open to further challenge, the project confirmed that total phosphorus limits are currently the best way to manage environmental risk from phosphorus in wastewater final effluent.