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Hussmann’s Environment Management System (EMS)

• Surface and Air Sanitation Technology

Course Number: FST100001 Revision: Original Date of Revision: March 21, 2013

EMS Technician Certification United States & International

Welcome!!

S Safety

P Purpose/ Course Objectives

A Agenda

C Conduct

E Expectations

R Roles

2

Course Objectives

By the end of this course, participants will be able to:

• Install, terminate and activate EMS products

• Service and maintain EMS products

• Troubleshoot EMS products

• Locate additional resources for information

Agenda 1. Introduction

2. The Science of EMS

3. EMS Safety Systems

4. EMS Equipment Models & Electrical Requirements

5. EMS Components

6. EMS System Sizing & Design

7. Installation

8. Activation

9. Maintenance

10. Troubleshooting

11. Customer Training

12. Documentation, Equipment Inventory & Tools Review

13. Review

14. Exam

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Conduct, Expectations & Roles

• Participate

• Be respectful

• Be prepared

• Ask questions

5

INTRODUCTION

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When you shop for food you expect…

Quality Food Safe Food

Clean, Odor –free Environment

When grocers sell food, they also want…

Long Shelf-life Increased “dwell” time

But these things create challenges…

Fortunately, Hussmann has a solution!

The EMS offers…

• Safer foods

• Cleaner stores

• Reduction of bacteria, molds and viruses

• Reduction of cross-contamination

• Cleaner air

• Safer, cleaner foods and surfaces

• Reduction of odors

• Extension of fresh food shelf life

…and it uses no harmful chemicals to do it!

It supports “hazard analysis and critical points” analysis

Can be used in a variety of settings

Microbes

3 main types of microbes we look at: • Pathogens – make people or plants sick (infection or toxins)

– Only a few percent of microbes are always harmful

– Examples: E. coli 0157:H7; Salmonella; Listeria; Norovirus

• Food spoilage – do not make people sick but cause shrink

– Examples: Botrytis (mold on fruits and vegetables); Serratia marcescens (slime and odor in meats)

• Neutral or beneficial

– Examples: yeasts in breads and yogurt

• ROS will break bonds in all these different types of microbes

Common Microbes Reduced and/or Eliminated by EMS Technology

• Serratia marcescens – Meat & Poultry

• Lactobacillus and related lactic acid bacteria – Meat & Poultry

• Infectious human diseases including – Bacteria

• Staph aureus (MRSA) • Citrobacter • Pseudomonas

– Yeast • Candida

– Viruses • Influenza A (including Bird Flu) • Norovirus (stomach flu) • Rhinovirus (colds)

• General microbial load – wide range of customer facilities

• Botrytis cinerea – FF&V – Floral

• E. coli O157:H7(pathogenic strain)

– FF&V – Meat & Poultry

• Listeria monocytogenes – Meat & Poultry – Fish & Seafood – Dairy

• Salmonella – FF&V – Meat & Poultry – Fish & Seafood – Dairy

Validation Testing Examples

It requires airflow to work

…cleans exposed surfaces

Cleans here

Not here

EMS Technology Can…

• Eliminate significant numbers of airborne microorganisms (bacteria, viruses, & molds) – Real world studies on hand show up to a 90% + reduction maintained

over months

– Up to 99%+ in controlled laboratory conditions

• Eliminate significant numbers of microorganisms on surfaces – Real world studies on hand show up to a 80% reduction maintained

over months

– Up to 99%+ in controlled laboratory conditions

• Greatly reduce ethylene gas

• Greatly reduce odors

• Provide greater benefit over longer periods of time (cumulative effect for environment & perishables)

EMS Technology Cannot…

• Work where no oxygen is present (no O2 = no ROS)

• Work where air does not circulate Inside airtight product packaging

Inside perishables

In rooms with poor or no air circulation

• Work in the open/outside air – no control possible

• Kill all microorganisms at the same rate under all

conditions

• Replace normal good sanitation practices The EMS technology can make the customer’s

environment safer and product better.

THE SCIENCE

OF EMS

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How does the EMS technology work?

• Clean electrical process creates a plasma of ionized particles by breaking down oxygen from the air - Reactive Oxygen Species (ROS)

• Equipped with a controller and self-check monitoring system to maintain constant required production levels of ROS.

Reaction Chamber

(creating ROS inside the unit)

How does the EMS technology work?

How does the technology

work?

• Clean electrical process creates a plasma of ionized particles by breaking down oxygen from the air - Reactive Oxygen Species (ROS)

• ROS are the sanitation workhorses of the EMS Surface and Air Sanitation technology. ( 2 stage sanitation process)

• Equipped with a controller and self-check monitoring system to maintain constant required production levels of ROS.

ROS

Diffusion System

ROS

ROS are the sanitation workhorses of the EMS!

Reaction Chamber

(creating ROS inside the unit)

Reactive Oxygen Species (ROS)

ROS Reactivity

Reactive Oxygen Species Break carbon-to-carbon bonds in carbon based

compounds

• Examples

– Microbes (bacteria, microscopic fungi & viruses) • Cell walls

• Enzymes

• DNA / RNA

– Ethylene • Plant hormone that promotes ripening

• Removal helps prevent

– Unwanted ripening (climacteric fruits)

– Aging (other fruits, vegetables and floral products)

– Odor compounds, machinery exhaust, etc.

ROS and Chemistry

Examples

Ethylene CH2=CH2 + ROS --> H2O + CO2 + O2

ethylene water carbon dioxide oxygen

Microbe Compounds - (equation very general and not balanced) Complex carbon molecules + ROS --> broken pieces of molecules + H2O + CO2 + O2

Inactivated

Not harmful

Not visible

Complex carbon molecule examples - DNA / RNA, cell walls, enzymes

2 Stages of Sanitation –

Stage 1

• Cleaning of air circulated through the reaction chamber

• 5 Short-lived highly reactive species react with microbes and other undesirable compounds in the air

• Atomic oxygen • Singlet oxygen • Hydroxyl radical • Superoxide • Peroxynitrite

• These ROS do not remain active long enough to move into the treated room

2 Stages of Sanitation –

Stage 2

• 100 % of surface sanitation and continued air sanitation

– Longer lived species, hydrogen peroxide and ozone, move out into the room

– React with and destroy microbes on room surfaces and in air

– Low concentrations do not exceed OSHA (Occupational

Safety and Health Administration), ACGIH (American

Conference of Governmental Industrial Hygienists) or

World Health Organization (WHO) safety levels

EMS

SAFETY

SYSTEMS

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EMS System Safety - People

• Ozone Safety Levels

• OSHA Regulations 24 hour average exposure limit - 0.050 ppm

8 hour average exposure limit - 0.100 ppm

Short-term exposure limit - 0.300 ppm

• ACGIH Regulations Threshold limit value – Heavy work, 0.050 ppm

Threshold limit value – Moderate work, 0.080 ppm

Threshold limit value – Light work , 0.100 ppm

• WHO Regulations 8 hour mean daily max - 0.050 ppm

– EMS – Average 0.030 – 0.050 PPM O3 and 0.10 to 0.20 PPM H2O2 for most applications where people work all day in the treated rooms (I.e. processing rooms, etc.).

– Hydrogen peroxide safety levels

• WHO Regulations Not regulated

• OSHA Regulations 8 hour average exposure limit – 1.00 ppm

EMS runs below human safety levels

EMS System Safety –

Products • As stated, the average setting for an EMS system is 0.030 –

0.050 PPM O3

• 0.050 ppm O3 is safe for people, but what about products?

• Some products are sensitive to O3 levels above an average of 0.030 ppm

• For Mushrooms and Flowers System settings must maintain an average of 0.030 ppm O3 and not above 0.040 ppm

• Good results are still seen at these levels.

Notes on Ozone

International Ozone Association (source OzoneLab™ (http://www.ozonelab.com/))

• 0.001 ppm - Lowest value detectable by hypersensitive humans. Too low to measure accurately with elaborate electronic equipment.

• 0.003 ppm - Threshold of odor perception in laboratory environment, 50 per cent confidence level.

• 0.003 ppm to 0.010 ppm - The threshold of odor perception by the average person in clean air. Readily detectable by most normal persons.

EPA and Airnow.gov (sources www.epa.gov and http://www.airnow.gov/index.cfm?action=airnow.currentaqi&PollutantID=1)

• How levels of Ozone produced by EMS compare to levels in our everyday environment.

– UV radiation in sunlight produces ambient levels of O3 in our outdoor air

– Most US cities average 0.020 to 0.040 ppm O3 outdoors during the day.

– During April, 2009, many areas in New England peaked at 0.075 to 0.080 ppm O3 during the afternoons while some US cities will peak above 0.100 ppm in late summer.

People may smell ozone from EMS – even at very safe levels

The system should not be shut down when ozone odor is detected.

EMS System Safety - Control

• Power limitation – All Systems

– Accomplished with • Unit correctly sized for room

• Unit with correct power supply (self-limiting)

• Resistor added to unit to maintain correct ROS levels

• Additional controls - use of PLC

(programmable logic controller)

to regulate ROS production levels

– Sensor

• Monitors ozone levels with

sensor and uses feedback to

maintain desired levels of ROS

– Timer

• System on only at desirable times

• Ex. off during wash cycles

Sensor Control

EMS

EQUIPMENT MODELS &

ELECTRICAL REQUIREMENTS

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Equipment Models: IR EMS

• Purifiers

– EMS-3100

– EMS-3300

– EMS-ST24

– T Series

– DCU Series

3000 Series: for

large facilities

DCU: display case unit

TT and TC Transportation

units for Trailers,

Containers and Railcars

ST Series for in-store coolers

and small rooms

IR products still in

engineering phases.

Equipment Capacities

Unit Coverage Range

cu. ft. (cu. m.)

Typical Application

EMS-ST24 400 – 6,000

(12-170)

Walk in coolers, Deli areas, small

processing areas

EMS-3100 A* (2 cup transformer

powersupplies)

6,000 – 11,000

(170-312)

Cold storage facilities, Restaurant

prep areas, Ripening rooms EMS-3100 B* (1 cup and 1 ET 100

powersupplies)

11,000 – 30,000

(312-850)

EMS-3100 C* (2 ET 100 powersupplies)

30,000 – 60,000

(850-1700)

EMS-3300* 60,000 – 250,000

(1700-7080)

Larger cold storage facilities,

processing rooms

* May be installed in series to expand coverage range.

Electrical Requirements

• ST 24 – One dedicated 15 Amp circuit

– Up to 6 purifiers (not likely to have over 2)

• 3100 – One dedicated 15 Amp circuit up to 2 purifiers + control box

– One dedicated 20 Amp circuit 3 purifiers + control box

– Combination of above for up to limit of 6 purifiers/control box

• 3300 – One dedicated 15 Amp circuit each purifier

– Control box can be installed on a circuit with one purifier

EMS

COMPONENTS

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ROS Reaction Chamber

The EMS has three main components

3000 Series System Components

Up to 6 ROS chambers can be run with one junction

box, controller and sensor

• EMS Purifier

– ROS

Chamber

• Sensor

• Control Box – PLC

– Junction Box

– Disconnect

• Diffusion Pipe

ST 24 Product Components

• Complete system in one box

– ROS Chamber

– Sensor

– Control

– Wiring

– On/off switch

Diffusion pipe not often used.

System Components: Purifier

• 3000 Series Purifier – Contains ROS generation

chamber

– Pulls air through for air sanitation by created ROS and releases ROS (ozone and hydrogen peroxide) for surface sanitation

• EMS-ST24 box – Contains

• ROS generation chamber

• Control & wiring

• Sensor

System Components:

Control Box • Control voltage power supply / router

• Programmable Logic Controller –Receives Product input and controls

Product operation

• Disconnect Switch- Allows customer to shut off ROS production from the

Product

System Components:

Sensor • Monitors Ozone

levels in the treated area to allow regulation of ROS production

• Two Types

RA-Regular Atmosphere

CA-Controlled Atmosphere

System Components:

Sensor • Two Models:

– S905- Standard

for use in

industrial

applications

– S935-For use in

environments

subject to

condensation or

wash-down.

System Components: Diffusion

System • Diffusion of ROS into

treated area

• 3000 Series – Normal: diffusion piping

– Occasional: direct dump from unit into airflow

• EMS-ST24 – Normal: direct dump from

unit into airflow

– Occasional: diffusion piping

Diffusion Piping

EMS

SYSTEM SIZING

& DESIGN

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Design

Design - Sizing

Calculated

Treatment

Area

• Actual FT3 (M3) Room Measurement

• Regular (21%)

• Controlled (.8%-5%) O2 Level

• Type of Commodity Product

• Fahrenheit / Celsius Temperature

Design - Sizing Overview

• Actual Room Size

• Commodity

• Temperature

• Oxygen Levels

Equipment sizing can be influenced by:

• Airflow

• Door Openings

• Equipment

• Ethylene production by product

• People

Equipment sizing depends on:

Design - Sizing :

Project Management/ Site Survey Form

See: Book - Resource

Materials Section

Project Management Form

Design – Sizing: Equipment Selection

Calculated Treatment

Area

Design – Example: Produce Warehouse

Design – Examples: Tomato Producer

Design - Typical Installation Example – 2 Fan

Design - Typical Installation Example – 3 Fan

Let’s Review

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