AKA: Jack the Sniffer Jack the Sniffer Fishbeck, Thompson, Carr - - PowerPoint PPT Presentation

► engineers • scientists • architects • constructors

Lift Station New Scents or Non-Scents?

MWEA IPP Seminar September 25, 2008

Presented By: John C. Rafter, Jr., P.E., DEE AKA: Jack the Sniffer

Jack the Sniffer

Fishbeck, Thompson, Carr & Huber, Inc.

►How I Got Here

►So, what’s this all about?

• What is an odor?
• Where to start?
• What are the options?
• Will it go away?

►What is an odor?

• Odor is a sensation
• Odorous compounds

stimulate smell and taste

• Trivia: The human nose

has 1 million odor receptor cells

►Why minimize odors?

• Health issues
• Environmental effects
• Nuisance complaints
• Regulations

Odors are sometimes good to have, they are a sign of things happening – eminent failure

eminent failure

►What do people smell?

• Organic and inorganic gases or vapors

fishy p u n g e n t , f r u i t y putrid r

• t

t e n c a b b a g e nauseating garlic d e c a y e d c a b b a g e f e c a l skunky putrid, fishy ammonia r

• t

t e n e g g s irritating

• Basic compounds: hydrogen sulfide, ammonia,

CO2, methane, also organic sulfide, amines, and mercaptans

►What do people smell?

Tom Fitzpatrick You walk out of the Amphitheatre after watching the Rolling Stones perform and suddenly the Chicago Stockyards smell clean and good by comparison.

So, where do we start?

►Steps to Identify an Odor

Odor Detected Odor Not Identified Odor Identified Investigation Begins

►Steps to Identify an Odor

Odor Not Identified Odor Panel Odor Analysis Sample Odor

►Steps to Identify an Odor

I don't know what that gas is made of, but it can't smell any worse than Ernie Johnson 's gym bag. Charles Barkley

►Steps to Identify an Odor

Odor Identified Odor Masking Odor Abatement Treatment Strategy

►Steps to Identify an Odor

• Conduct a preliminary survey

– Dissolved oxygen (DO) – Oxidation-reduction potential (ORP) – Total sulfide – Gas tubes or electronic gas detector meters

►Steps to Identify an Odor

When do I survey?

When it smells!

Usually during hot summer days

►Steps to Identify an Odor

Generally, what are the causes?

• Long detention time
• Warm wastewater (temperature)
• Long dry spells
• Industry

►Steps to Identify an Odor

Guests, like fish, begin to smell after three days. Benjamin Franklin

►Steps to Identify an Odor

Liquid Stream

• Flow, DO,

temperature, ORP, total sulfide, dissolved sulfide – 2 to 6 hours

• Oxygen uptake rate –

4 to 8 hours

• Sulfate, BOD5/COD,

SS – composite

Gas Phase

• H2S, mercaptans –

2 to 4 hours

• Other compounds

(gas chromatography or mass spectrometry) – as needed

• Odor intensity
• Effective dose

(ED50)

►What are the options?

What is important to you?

• Capital
• Operation and maintenance
• Non-monetary items

►What are the options?

What non-monetary items are important to you?

• Safety and containment
• Transporting Chemicals
• Expected life
• Performance
• Reliability

►What are the options?

The first condition of understanding a foreign country is to smell it. Rudyard Kipling

►What are the options?

How can you minimize odors?

• Reduce sulfide concentration
• Equalize the flow pattern
• Work with your industrial customers
• Minimize splashing in MHs
• Clean ‘em!

►Speaking of cleaning out a line ...

►What are the options?

Control Options

• Liquid Phase

– Oxygen using air or pure O2 injection (aka: superoxygenation) – Sodium hypochlorite injection – Hydrogen peroxide, ferrous or ferric salts,

• r potassium permanganate injection.

– Nitrate salts – Proprietary compounds

►What are the options?

• Gaseous Phase

Masking Agents

– Essential oils – Other

►What are the options?

I judge people on how they smell, not how they look. Jennifer Lopez

►What are the options?

• Gaseous Phase

Vapor phase treatment:

– Biofiltration – Scrubbing – Adsorption – Condensation – Catalytic oxidation – Thermal oxidation

►What are the options?

Biofilters

• Treat large flows
• Low pressure

requirements

• No chemicals required

►What are the options?

• Treat a variety of

compounds

• Common use
• Increase range

with additive compounds

Activated Charcoal Filters

►What are the options?

Wet Scrubbers

• Widely used
• Handles large

gas flows

• Can handle varying

concentrations

►What are the options?

Ionize Air System

• Compact
• Oxidizes organic
• dors

►What are the options?

Biotrickling Filter

• Modular design
• Low-profile

design

• Factory

assembled

►What are the options?

UV Chamber

• Specific

frequencies of UV light

• Compact
• Pass ambient air

through system

►Case History: Saline WWTP

• Odors at 7 a.m.

and 5 p.m.

• Plant flow

negligible at night

• Already had an
• dor scrubber

►Case History: Saline WWTP

►GH-SL Lift Station

• Periodic odors
• Affected condos
• Localized

►GH-SL Lift Station

• Began with an odor control study
• Reviewed mechanical

technologies versus chemical additions

• Identified controlling factors
• Currently using a combination

approach: chemical additive and customized activated carbon filter

►Will it go away?

NO

► engineers • scientists • architects • constructors

►Thank You

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