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

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. ► engineers • scientists • architects • constructors

► 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 y t r i o u t t r e f n , c t n a b e b g a n g garlic putrid e u p e g a b putrid, fishy b a c ammonia d e y a a l c c e e f d nauseating r o t t e n irritating e g skunky g s • Basic compounds: hydrogen sulfide, ammonia, CO 2 , 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 Investigation Begins Odor Not Identified Odor Identified

► Steps to Identify an Odor Odor Not Identified Sample Odor Odor Panel Odor Analysis

► 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 Treatment Strategy Odor Masking Odor Abatement

► 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 Gas Phase Liquid Stream • Flow, DO, • H 2 S, mercaptans – temperature, ORP, 2 to 4 hours total sulfide, dissolved • Other compounds sulfide – (gas 2 to 6 hours chromatography or • Oxygen uptake rate – mass 4 to 8 hours spectrometry) – as • Sulfate, BOD 5 /COD, needed SS – composite • Odor intensity • Effective dose (ED 50 )

► 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 O 2 injection (aka: superoxygenation) – Sodium hypochlorite injection – Hydrogen peroxide, ferrous or ferric salts, or 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: – Condensation – Biofiltration – Catalytic oxidation – Scrubbing – Thermal oxidation – Adsorption

► What are the options? Biofilters • Treat large flows • Low pressure requirements • No chemicals required

► What are the options? Activated Charcoal Filters • Treat a variety of compounds • Common use • Increase range with additive compounds

► 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 odors

► 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 odor 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

► Thank You www.ftch.com ► engineers • scientists • architects • constructors