Dynamic licensing – integrated control of urban wastewater systems

STREAM-Engineering Doctorate project

By: Biniam Biruk Ashagre

Academic Supervisors: Dr Guangtao FuProf David Butler

Industrial Supervisor: Ms Kerry Davidson

Safe and Sure project weekly meeting: 29/08/2013 Sponsors:

In this presentationWhat is dynamic licensing?Why dynamic licensing?Aim and objectives of the projectStudy sitesMethodology and Work planWhat is done so far?

What is dynamic licensingIt is an approach that align the real time

operation of wastewater treatment plants in harmony with the dynamic capacity of receiving water.

Why dynamic licensing?

Drivers

Environmental legislation like

Water Framework Directive

Strict discharge standards leads to Increased energy

demand and carbon footprint

Climate change

regulations

Demands reduction in

carbon footprint

Economic point of

view

Demands reduction in energy

consumption

Suggestion

The use of holistic view inspired by WFD and allow WwTPs to run dynamically in synergy with the environment

Aim of the projectThe aim of the project is to develop an

integrated catchment based control strategy in which several WwTPs can operate optimally using a dynamic licensing approach without affecting downstream water quality.

Main objectives1. To come up with a control strategy by

integrating river, WwTP and the sewer system so as the WwTPs can operate optimally to:

i. Reduce energy consumptionii. Reduce carbon footprintiii. Meet the effluent quality which is determined by

the dynamic receiving capacity of receiving river

Main objectives

Figure A conceptual representation of integrated urban wastewater modelling as the first objective. Prepared in collaboration with Sam Dickinson

Main objectives2. To come up with a control procedure to optimize catchments

for the best possible downstream river water quality while assuring a reduced energy consumption and carbon footprint.

Control procedures will be developed for very WwTP based on downstream river quality and upstream WwTPs will work in coordination with downstream WwTPs

Study sitesCupar catchment• Catchment Area (km2): 307.4

• 9 WwTWs (inc. Cupar)

• 1 Septic Tank

• 31 network CSOs

• Sewer Networks: 10

(7 with CSO’s)

Study site: Cupar WwTP

Figure Cupar wastewater treatment plant (STOAT)

Sludge Tank

Storm Screen

Two storage tanks

Replace AS reactors with OD

Screen & Skip

Upper Intake

Intermittent pumped inlet

Study site: Selkirk WwTP

Study sitesSelkirk

Catchment• Catchment Area (km2):

499.0

• No of WwTWs (inc. Selkirk): 1

• 1 Septic Tank???

• No Network of CSOs: 10

• No of Sewer Networks: 2 (1 with CSO’s)

Methodology and work plan

Work Plan

Thank you!