Understanding the route to WFD compliance in the …...Case Study: Garmerwolde Both serve approx....

Understanding the route to

WFD compliance in the Lower

River Clyde

24/02/15

gordon.reid@scottishwater.co.uk

Daldowie

WwTW

Dalmarnock

WwTW

What outcomes are we

looking to achieve? UWWTD

target

(1 mg/l)

Water Framework Directive

Classification (2013 data)

Key Classification Status Moderate / Moderate Ecological Potential

Poor / Poor Ecological Potential

Bad / Bad Ecological Potential

River Kelvin

Avon Water

North Calder

White Cart

Black Cart

Rotten Calder

River Clyde

Lower River Clyde

Upper River Clyde

Inner Clyde Estuary

Shieldhall WwTW Paisley WwTW

Dalmuir WwTW

Dalmarnock WwTW

Daldowie WwTW

South Calder

P R

ange (

mg/l)

New WFD EQS SRP 0.069 mg.l-1

Soluble

Reactive

Phosphorus

10

5

Soluble

Reactive

Phosphorus TP

SRP NEREDA

Typical influent

Total Phosphorus

Typical effluent

Total Phosphorus

Typical effluent:

Chemical P

removal UWWTD TP 2mg.l-1

UWWTD TP 1mg.l-1

Asset Type

Phosphorus Standards

Now and Future

Lower River Clyde -

Option 3

10km

Revised stds illustrative only

66 62

53

Case Study: Garmerwolde

Both serve approx. 150,000 pe

High quality effluent

50% energy reduction

Activated Sludge and

Nereda granules after 5

mins of settling

Nereda granule structure

Daldowie WwTW – proposed

layout

3 no rectangular

Nereda reactors,

pumping station and

blower house

Nereda

Stabilise imported granules

Grow granules

Low temp operation

Toxic shock loading

Hi loading

PSD impact

Sludge impact

Pilot Experiment

Pilot Experiment

- Performance so far

Continue pilot experiment

Develop full scale design

Agree WFD approach with SEPA

Pilot Experiment – next

steps

Thank you