S

CSOnetNew Technology for

Collection Systems Management

Combined

Sewer

OverflowUp to 7.1 million sewage

related illnesses annually

3

Size of the Problem

S 772 cities

S 46 million people

S 850 billion gallons

S $50.6 billion

S 13%-39% reduction

Traditional SolutionsWWTP Expansion

Sewer Separation

S Expensive (x10-x100)

S Disruptive

S Not always compliant

S Not always feasible

S I&I problems

S Last Resort

4

WWTP

Expansion

SeparationAtlanta 27%

separation

$900

million

Alternative

SolutionsIn-Line Storage

Off-Line Storage

S Less expensive

S Less disruptive

S Perceived risk

S Few implementations

S Most effective with RTC

5

Off-Line StorageChicago TARP

$3.2 billion

In-Line StorageIndianapolis White

River Dam

$1.0 million

Real Time Control

S Uses current data

from actual sewer

conditions

S Adjusts flows

automatically

S Reduces CSO

S Reduces flooding

S Makes the sewer

system “intelligent”

RTC Basics

S Eyes – monitor, sensors

S Brain – control strategy, computer hardware / software

S Hands – control, valves, pumps etc.

Eyes:

Traditional SCADA

8

Antenna

Pole

Cabinet

PLC

Sensor Module

Radio Modem

Power Supply

Power Meter

S Assembly

S Power

S Installation

High Cost per Site

Brain:

Traditional Control Strategy

9

A SCADA System

requires a locally

managed control

center

Milwaukee SCADA

Software

Implementation $5

million

S Milwaukee ($5M)

S Louisville ($250K/year)

S Not Scalable

S Black Box

S Long learning curve

S Dependence on

provider

Hands:

Traditional Flow Control Devices

S Electric Valves

S Electric Gates

S Inflatable Dams

S Pumps

10

New

Technology

11

• Indiana 21st Century Fund

• Lead organization

• Focus on environmental

monitoring and control

• Develops / commercializes

wireless technology

New Technology: CSOnet

12

Wireless network of monitoring and control points

for system wide sewer management

Key Aspects:

S Numerous monitoring points

S Real time data collection

S Out-of-the-box control strategy

S Fraction of the cost of traditional systems

S Maximizes use of existing infrastructure

S Complete integration with existing systems

How It Works

13

Logicover

Gateway

14

City-Wide CSOnet

ApplicationWide

Area

Network

CSOnet Sensor

Data Acquisition Point

WWTP

Municipality

Field Real Time Tools

S Website

S Cell Phone

S Email/Text alerts15

Importance of Monitoring

S Learn how the sewer system operates

S Identify areas for improvement or storage

S Early detection of sewer problems

S Evaluate improvements

S NMC Compliance

16

CSOnetReal Time Control

CSOnet Control Strategy

18

19

Case Study:

City of South Bend

Population: 107,000

CSO discharge points: 36

CSO area: 20 square miles

Sewer length: 500 miles

CSO volume: 1.0 billion gallons/year

CSOnet monitoring points: 110

CSOnet Control points: 15-20

South Bend CSOnet Goals

S Eliminate dry weather overflows

S Prevent basement backups

S Identify areas for inline and offline storage

S Identify sources of I&I

S Enhance existing automated control system

S Maximize flows to WWTP

S Calibrate Model 20

Dry Weather Overflow

Prevention

21

Overflow

Height

Problem

Solved

Crew

Arrives

Alarm

Sounds

Preventative Maintenance

22

23

Increase Flow to WWTP

Throttle Line

Combined

Sewer

Trunkline

Interceptor Line

Overflow

Line

Weir

Cabinet

or Traffic Signal

GNode

INode

Sensor

Stilling

Well

Manhole Cover

Antenna

Weir

Sensor

Stilling

Well

Larger Parallel

Throttle Line

Actuated ValveCombined

Sewer

Trunkline

Interceptor Line

Conduit

Overflow

Line

CSOnet Capabilities

S Reduce CSO volume by balancing flows to WWTP

S Increase inline storage opportunities

S Control where overflows occur

S Increase storage ability in retention basins by up to 150%

S Prevent dry weather overflows

S Prevent basement backups

Annual Overflow Volume

Existing System (MG)

Annual Overflow Volume

CSOnet System (MG)

Percentage

Reduction (%)

918.2 702.8 23%

South Bend, Indiana

CSOnet Monetary Results

S Original CSO LTCP budget = $400 million(separation, WWTP expansion, tunnel)

S CSO LTCP budget with CSOnet = $250 million(separation, WWTP expansion)

S EPA will accept alternative if:

S CSO volume reduction is achieved

S On schedule

25

CSOnet Capabilities

S Fulfill five of the Nine Minimum Controls

S Dry weather overflow prevention

S Basement backup prevention

S Identify areas for inline and offline storage

S Identify I&I sources

S Maximize flows to WWTP

S Calibrate existing sewer model

Summary S Real-time monitoring and control

S Maximize use of existing infrastructure

S Simple, fast installation

S Plug-and-play functionality

S Incrementally implementable

S Inexpensive

27

Questions

28

S

Localized-Reactive Control

29

Pros: Small dependence on communications

Small dependence on hydraulic models

Robust to device failure

Relatively inexpensive

Cons: Poor system-wide performance

Global-Predictive Control

30

Pros: Good overall performance

(only if model is right)

Cons: Dependent on model

Dependent on communications

Large computation requirements

Less robust

CSOnet Control

31

Pros:

Small dependence on models / communications

Inherent redundancy (robust)

Good overall performance (small receding time

horizon)

Can be integrated with SCADA