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Harvest Power uses e-noses @ Organics Co-Digestion Facility in Orlando

Harvest Power's Energy Garden in Central Florida is designed to simultaneously address four challenges with one integrated solution:
  • to recover energy and nutrients from food waste,
  • manage odors,
  • process biosolids beneficially
  • improve the fertilizer end product quality

Located at Reedy Creek Improvement District, this anaerobic digester processes 130,000 tons per year of biosolids, fats, oils, grease, and food waste and has 3.2 MW of installed power generation capacity and 2.2 MW of recoverable heat from a biogas-fueled combined heat and power system (CHP), plus class AA granular fertilizer and phosphorous-rich Struvite sold as a fertilizer additive.

Harvest Power Orlando   Energy Garden Small 

The project involves several organizations

LOCAL PARTNERS: Reedy Creek Improvement District (RCID), Reedy Creek Environmental Services (RCES), Walt Disney World Resort, and all local participating hotels, restaurants, food processors and haulers.

PROJECT SERVICE PROVIDERS AND VENDORS: Bio-Conversion Solutions (BCS), Biorem Technologies Inc., Caterpillar (CAT Finance), Crystalactor, Entec Biogas GmbH, Environ, Inc., Florida Aquastore, Flottwegg, Golder Associates, Komline-Sanderson, Layne, Inc., Odotech, World Water Works Demon(TM), Ring Power Corporation, Sattler*. PUBLIC RELATIONS: Featured in BioCycle*, the front page of the Orlando Sentinel, the Orlando Business Journal, WFTV News 9, Green Lodging News, and on National Public Radio’s (NPR) Morning Edition. 


Process Highlights

The major components of the Facility include:

  • Food waste pre-processing: food waste receiving pit and conveyance, depackaging, contaminant/inert material removal, and dilution of received food wastes to a pumpable slurry
  • Odor capture and treatment systems (Biorem), with continuous monitoring (Odotech)
  • Entec Biogas proprietary anaerobic digestion process
  • Biogas conditioning system with moisture and hydrogen sulfide removal
  • Digestate screening for enhanced fertilizer product quality
  • Digestate dewatering
  • Indirect thermal drying (Komline) using waste heat from a biogas-fueled combined heat and power system (Ring Power CAT), including back up propane system for emergency or supplemental fuel
  • Side-stream treatment of dewatering centrate including:
    • Phosphorus removal/recovery using a struvite reactor (Procorps Crystallactor)
    • Total nitrogen reduction using a proprietary sequencing batch reactor process and Anammox bacteria (Demon™ by World Water Works)

Harvest Energy Garden resized 600

Innovative to manage odors

Reduction of odor excursions and/or odor events was one of the main objectives of the project.  As HPO ramped-up, RCID was able to discontinue Aerated Static Pile (ASP) composting operations for biosolids and food waste.  Also, at the same time as HPO was beginning operations, RCID modified the WWTP and diverted a sidestream of WAS to the headworks at a rate of about 0.1Q, which cut the H2S levels at the headworks significantly.  Finally the HPO odor control system collects potentially odorous air from the food waste receiving pit, centrate sump, FOG tank, dryer exhaust and other locations within the plant and applies biofiltration with activated carbon polishing prior to atmospheric discharge. 


The facility is equipped with a four electronic noses Odor Monitoring

electronic nose Reedy Creek

  • OdoWatch® - Odor Smart Monitoring system
  • 24/7 odor measurement with eNoses
  • Software models the atmospheric dispersion and displays the site's odor plume

RCID has installed an OdoWatch system with 4 “e-noses” to monitor treatment plant, composting and HPO odor signatures and has been able to verify the odor reduction associated with the measures described above.  RCID has not experienced any significant odor events since the HPO project and other measures became active. 


Currious about electronic nosea! Please download our free white paper

White PaperHow Does Work an Electronic Nose

How to Manage Odour from Organics Residuals Recovery & Recycling


The Canadian Compost Council will have its 24th Annual National Conference this week: September 22 to 24, 2014 in Halifax, Nova Scotia

Feed the Soil Compost 

It will be a great opportunity for Presentations, Tours, Training and Exhibits.

Odour Management Training:

Going beyond the theoretical, this one-day workshop will delve into the operational dynamics of an odour management system for organic residual processors. Presented by Odotech, specialists in odour audits and dispersion measurement & modelling, the session will discuss the how-to’s of:

  • the quantification of odour emissions
  • assessing a baseline for odours
  • atmospheric dispersion modelling
  • identification of on-site odour-producing sources
  • complaint management
  • determining appropriate treatment systems
  • regulatory management
  • setting performance criteria within an Environmental Management System

Get the Free Odour Management Pre-training Slide Deck


Anaerobic digestion facility and compost facilities:

  • Southwest Eco-Energy anaerobic digestion plant, Digby County
  • Spec Environmental Solutions Inc.,Digby County
  • Northridge Farms, Annapolis Valley
  • Followed by a Barbeque supper at Northridge Farms.


Facilities involved in a wide range of organics residuals recovery and recycling, dealing with residential, IC&I, agriculture and wastewater residuals:

  • Miller Compost, Dartmouth
  • N-Viro Systems Canada’s Halifax Plant
  • Halifax C&D Recycling Ltd., Milford
  • Folkerstma Farms Limited, Milford
  • Colchester Balefill and Colchester Composting Facility, Kemptown



A series of plenary and concurrent sessions covering organics recycling and facility regulations, diversion initiatives and progress, technical advancements and international comparisons.

  • Organic Residuals: Too Good to Waste & So Important to Recover
  • Cross-Canada Program & Regulatory Check-Up
  • Technology & System Design Advances
  • Compost Matters Internationally
  • Anaerobic Digestion, Biogas & Digestate Production
  • Recovering Organics from Residential and IC&I Sources
  • Biosolids Composting
  • Research Findings & Updates
  • Tackling Food Waste & Making Compost Work Locally
  • Compost Markets & Standards
  • Composting to Manage Issues beyond Waste


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How to communicate your odor mitigation plan


In the context of odor management, communication is of special importance and should not be set aside.

Exposure to offensive odors raise questions about potential health risks, loss of property value and the fear of additional odor episodes. They can become a source of stress, frustration and anger, especially when the neighbors do not feel that their situation is taken care seriously. The lack of communication can increase irritation and cause a loss of trust in those responsible (plant operators, policy makers and officials).

To communicate your efforts to reduce odors, your mitigation objectives, the budgets invested and results achieved can help to reduce the feeling of injustice and powerlessness that some residents may develop. Too often in tense situations, some facility operators fail to communicate their plan of action and positive outcomes obtained. Although significant improvements have been achieved in terms of reducing the level of odors and frequency of exposure, the discontent in the community has not necessarily diminished because a lack of communication and trust.

Proactive communication through an odor observer committee (OOC) is an excellent way to promote the emergence of communication between the managers of the odor emitting sites and nearby residents. In the process of setting up an OOC, a group of volunteers from the community are trained to recognize and quantify odors and how to report odors in a consistent manner.  The OOC provides an effective communication channel between members of the community and the plant managers. This helps to convey odor master plan objectives and odor observations relevant for environmental monitoring and management operations. On a regular basis, members of the OOC are invited to review the results of their participatory monitoring and actions implemented by the company.

As such, the company BFI Canada, part of Progressive Waste Solutions, operates a technical landfill in the Montreal’s suburban. This corporation is serious about environmental monitoring: they mandated Odotech to execute their air quality monitoring (VOCs) and to carry their odor observer committee since 2005. 

Community odor monitoring

As another example of best-in-class operation, BFI invited last May 4th, the local communities for its third open house, which were both an awareness activity and a large family party. On the menu: games, discoveries, tips and information on the various activities carried at the landfill in Terrebonne.

Participants of all ages were invited to take part in a guided tour of the site and learn more about the landfill, the waste management operations, the biogas power plant, the new biomethane production plant, the green waste composting facility and wastewater treatment plant. There was also information kiosk on environmental activities including the monitoring of odors and VOC.

community Odor monitoring training

Odotech team members are explaining to local resident odor impact assessments, odors, odor monitoring, odor observer committee and ambient air VOC monitoring program.   

The Odor Observer Committees and open house days are great ways to communicate the efforts made ​​to reduce odors. Holding public meetings to present the results of odor impact study and continuous odor monitoring are also effective: whether you are at the planning phase of the project, at the implementation phase or during normal operation of a plant.

Use the nose of your neighbors as mobile odor sensors!

At the age of Web 2.0, OdoView is a new tool of participatory management and communication with your local community. Using a smartphone application, members of your community can bring you essential information to help you better manage your operations and measure the impact of your actions by reporting odors in their normal business wherever they are . Odotech adapts the Smartphone application to your specific context including a website and a hotline for parallel ways to report odors. The results are available to you online through a web console. Discover this new tool already adopted by several operators and municipalities.

Odor Monitoring app
Download the OdoViewTechnical Documentation

First in Class Odor Monitoring in California @ CWEA Annual Conference


Orange County recently became the largest installation of OdoWatch - Electronic Nose and live plume Odor Monitoring - system in California.  They are currently monitoring their Plant 2 at Huntington Beach, and will be monitoring Plant 1 in the near future.

Odor prevention by electronic nose monitoring

We invite you to learn more on this project at the California Water Environmental Association annual conference & show show in Santa Clara this week May 1-3. Here is the link to the annual conference website for CWEA:



odor monitoring for WWTP

Kruger, the exclusive U.S. distributor for OdoWatch to municipal wastewater treatment facilities in the United States, is at the CWEA show in Santa Clara (Booth #407).  Reach out to Sharon Paterson, OdoWatch Product Manager at Kruger, to get more information on our latest OdoWatch installations in California. Stop by the Kruger booth to see what makes the Orange County system unique.  OdoWatch systems are used by any size WWTPs in order to understand their odor impact, be proactive, and find rational odor reduction solutions at the lowest operational and capital cost.  See how OdoWatch can save you money through using your capital and staff to their best possible advantage. 


Odor Control, Odor Prevention & Odor Modeling @ Waste Expo 2014


Year after year, WasteExpo is the waste management industry's largest conference and tradeshow of its kind in America, serving both the public and private sectors. Last year's Composting & Organics Recycling tracks were standing-room only and at its first edition! This year the Composting & Organics Recycling section of the Conference  willl have even more content and sessions.

Waste expo organic

Odotech is proud to present for the second edition in the Waste Expo’s Annual Organics Recycling and Composting Conference Program. You get last year presentation on Odor Monitoring for Anaerobic Digestion, Composting and Landfills by following this link.

April 29, Track 1 will focus on Compost Facility Development, Best Management Practices, Adding Food Residuals and Odor Control . We invite you to attend the 300PM session on Odor Control, Prevention and Modeling. Odotech will present a paper on Static vs. Dynamic Dispersion Modeling for Composting and Organics Recycling Facilities.  

Get the WASTE EXPO PPT On Static Vs. Dynamic Dispersion Modeling


Get the WASTE EXPO PPT On Static Vs. Dynamic Dispersion Modeling


This paper addresses the major differences between static and dynamic dispersion modeling for odor nuisance prediction and compliance:

  • Why does modeling fit into the planning for odor compliance and odor control?
  • What to model?
  • A quick summary of the data inputs needed to run a dispersion model in a Static or a Dynamic modeling perspective.
  • What are the benefits of each modelling approach?
  • Cases studies

Dispersion modeling defines the relationship between the emission source and the receptor. While control measures may be applied to the emission source, compliance with odor nuisance standards depend on whether the odor concentrations at the receptor have been adequately reduced with respect to their frequency, intensity, duration and location.

For existing sources, it is not possible to verify compliance with nuisance odor standards by monitoring odor concentrations at the receptor because of the low odor thresholds and the variable nature of odor impacts. For new or proposed odor emission sources, dispersion modeling is also the only method to determine compliance, since the potential odor emission source does not yet exist.

Static Modeling

Static modeling is where the odor source is sampled during few campaigns and the olfactometric results are used to assess a single steady state characterization of the source. Modeling is done using historical data from weather stations remote from the site. The results are probabilistic: odor impact assessment based on the pairing of "worst case" emissions with "worst case" dispersion. Compliance is based on some "acceptable" level of exceedence expressed as a percentile of number of hours. Static modeling is the only option for new or proposed odor emission sources, as the odor source does not exist and cannot be monitored. Static modeling is also called odor dispersion modeling assessment.


isocurve first max      

Example static modelling of the odor concentration (OU/m3) distribution centile 98

Dynamic Modeling

Dynamic modeling is a pairing in real time of monitored odor emissions and measured meteorology. The pairing of emissions and dispersion are not independent parameters as in the case above. The critical aspect of this is that odor control measures can be applied dynamically, based on predicted exposures and not limited to controlling the worst case condition. Dynamic modelling is the preferred option where the odor emission source is large and not easily contained using conventional odour control technology.

Dynamic Callpuff

Example dynamic modeling of the odor concentration (OU/m3) distribution over a 24 hours period.

How to Interpret Odor Nuisance Regulations


The most common approach to regulating odor impacts is through the interpretation of odor nuisance. The origins of odor nuisance regulations come from English Common Law which balances the rights of individuals. One has the right to swing their arm up to the point that a closed fist approaches another person’s nose. At that point, the other person’s right not to be assaulted prevails.

Odor nuisance does not prevent a person from creating or releasing odors, even offensive odors, from their property. However, that action is limited by the potential impact those odorous emissions have on their neighbors. The allowable threshold is not always clear. Like squirmy children in the back seat of a car, how close can you come to touching someone without being a threat?  “He’s touching me! No I’m not!” The allowable emission of odorous compounds without being a nuisance is also subject to interpretation.

Nuisance impacts are the most common reason that odors impacts are mitigated. While most states have prohibitions of nuisance impacts under common law, few states define what odor concentrations are associated with nuisance odor impacts and even fewer define what the frequency and duration of those impacts should be. In most cases, nuisance impacts must be verified by a regulatory authority to be considered valid.


Learn more about Odor By-Laws


Odor nuisance language can appear in an air quality statue as part of the definition of key words, such as “air pollution”, “air contaminant” or “nuisance”. It may also appear as a separate odor nuisance standard. An odor is a nuisance if it “unreasonably interfere with the proper enjoyment of the property of others” (Code of Maryland Regulations, Title 26 – Department of the Environment, Subtitle 11 – Air Quality .01 Definitions), “unreasonably interferes with the enjoyment of life or the use of property” (Connecticut DEM Regulations, Section 22a-174-23. Control of odors), and “unreasonably interfere with the enjoyment by the people of life or property” (Title 9 Virginia Air Code, 9VAC5-10-20. Terms defined).

To interpret odor nuisance standards, it is necessary to explicitly define what type of odor episode you are trying to mitigate and set frequency, intensity, duration values appropriate for that episode. There are common elements in the language of odor nuisance that allows us to interpret useful values. First, the affected person must not only detect an odor, the person must recognize the odor as being distinct from other background odors and be specific to a particular source. In a laboratory, a trained odor panelist can detect an odor is present in a sample when compared to carbon filtered air at 1 odor unit, even if the panelist cannot describe the odor. At about 2 to 3 odor units, a panelist can describe the character of an odor when mixed with carbon filtered air. For an untrained observer to detect an odor in the natural environment where there are competing odors, the odor concentrations need to be between 5 and 10 odor units.

The duration of the odor episode must be sufficiently long duration to interfere with the activities at the person’s property. The duration of the odor episode may be further extended by the requirement that a regulatory official confirm or verify that the odor is present. While a person can perceive an odor in a few seconds, it may take several minutes before the presence of the odor disrupts activities at a person’s property. It may take several minutes more before the affect person acts by filing an odor compliant. If a regulatory official is needed to confirm that an odor is present before a formal complaint can be filed, an odor may need to persist for a period of an hour or more.

To be a nuisance, an odor episode must be unreasonable. While a single odor episode may be unpleasant and disruptive, it may also have been accidental or unavoidable. Odor episodes that re-occur over a period of time become preventable and are an unreasonable imposition on the surrounding community. The relationship between frequency and duration and frequency and intensity are inversely related. Odor episodes with low odor concentrations and persist for short periods of time can be tolerated more frequently than high odor concentrations that persist for long periods of time.

odor nuisance plume

Example of a real time odor plume based on onsite continuous odor monitoring


Offensive odors provoke the strongest response. They may also be distinctive in their character relative to normal background odors, so that even a low odor concentration can result in a sharp response. However, even more pleasant odors if they have a high odor concentration and persist for an extended period of time with a high frequency of occurrence can be a nuisance.

When odor nuisances are interpreted in this manner, it is possible to apply standard measurement, monitoring and modeling methods to evaluate odor impacts and develop appropriate mitigation measures.



You want to know more onInternational Odor Regulations?Free review for downloadClick here


Odour Measurement Instruments and Odour Management Workshop - Compost Canada


After Nova Scotia, Edmonton, Vancouver and Toronto, the Compost Council of Canada concludes the Grand Canadian Tour of technical workshops - Compost Matters in Canada - in Winnipeg, Manitoba March 18th & 19th.

Compost Manitoba

Once more, Odotech is proud to partner to this great initiative an provide an technical session on odour management for organic waste facilities.

The workshop is hosted by Green Manitoba & Recycling Product News and numerous attentees are expected.

Green Manitoba Logo Recycling Product News 


Key matters for the industry will be covered:

  • Modernizing the Fertilizers Act and Regulations

  • Composting in Manitoba

  • Outreach to Residents and the IC&I Sector

  • Composting and Gardening Programs in the North

  • Compost Collection Program at the University of Winnipeg 

  • Updates from the Manitoba Composting Association Corporation

  • Compost Research on Potato Diseases and Production

  • Potency of Manure Compost: Knowing the Limit for Crop Production

  • IC&I Composting for Manitoba's Capital Region

  • Essentials of Odour Management at Organics Management Facilities, given by

    Jacinthe Bisson, Eng, Senior odour expert, Odotech inc.

Jacinthe is the leader of our Odor Science groupe. She ran numerous odour studies, odour observer committee and electronic nose projects.

Odotech is proud to be associated with the Compost Council of Canada to present the segment on the Essentials of Odour Management at Organics Management Facilities. We have prepared a special presentation for composting facilities, anaerobic digestion projects, landfills and others. Key topics will be address to provide attendees a complete tool box from the science of odour perception and odour metrology, odour management planning, odour impact assessment, continuous odour monitoring and odour control.

electronic nose composting plant 

Odotech has been in the business of odour management for 15 years and lead over 700 projects in all types of industries with teams of specialists in North America, Europe and Latin America. Odour studies, odour mitigation plans and prevention programs, Odour Monitoring System (e-nose) and real-time modeling tools (More than 100 systems installed, nearly half on organic waste sites). From 2009 to 2013 we worked with 70+ organic plants in Canada, USA, France, Chile, Norway, Brazil, Columbia, Belgium, Switzerland, Israel (Composting, Digestion, Landfills and integrated sites).


Harvest Power odor monitoring


Download the registration form


For additional information, please visit, email at or call 1-877-571-4769


Get the pre\u002Dtraining PPTEssentials of organics odour mangement

Measure Odor & H2S in Sewer Collection Systems in Real Time


The Water Environment Federation (WEF) Collection Systems Committee, in cooperation with the Chesapeake Water Environment Association and the National Association of Sewer Service Companies are holding the Collection Systems 2014 Conference this week in Baltimore, Maryland. This conference will draw professionals from around the region and across the country who share an interest in improving the combined and separate sanitary sewer collection systems. 


Odor and H2S emissions are major concerns for collection systems. What if operators could diagnose odor problems in minutes instead of hours or days?  How much could they save in chemicals, time, implementing new process and infrastructure corrosion?  Find out at the Collection Systems 2014 Conference this week!

OdoWatch is the only technology that measures odors the way humans experience them, in D/T or odor units.  Together with the real-time dispersion modeling created from actual on-site weather data and the emissions from odor sources, OdoWatch displays color-coded plumes of odor concentrations on and off site where they may be a nuisance.  No other technology provides such accurate, timely information on odors and H2S. Fnd information on OdoSulf, the newest H2S monitoring technology that can uses the OdoWatch platform to provide real-time plumes of hydrogen sulfide impact. Operators using OdoWatch for odor and H2S monitoring have saved hundreds of thousands of dollars in OPEX and CAPEX.

Contact Sharon Paterson, Kruger Product Manager for OdoWatch at to meet her at the conference.  See you at the event!


Get the WEFTEC abstractH2S Vs. Odor Units




Odour Monitoring Equipment Supplier‎


The OdoWatch Platform is a turnkey solution to provide all necessary equipment for real time odour monitoring. It includes the required odour and gas sensors and a weather station. It records and stores all monitoring data so you can review exactly what happened in the past.

Headwoirks odor monitoring

The e-noses are positioned near the odour sources of the site and measure the odour continuously. The odour data from the e-noses and the weather data from the weather tower are sent to the OdoWatch software, which models the atmospheric dispersion and displays the site’s odor plume calculated by AERMOD or CALPUFF. OdoWatch is calibrated to recognize and quantify (in odour units) the odours of each site.

Odotech's electronic nose has the capability to continuously monitor and record odour levels. It is composed of a matrix of 16 MOS sensors. OdoWatch also has the capability to continuously monitor and record H2S gas concentrations and integrate Multigas Detectors for real-time monitoring of up to four (4) different gases (H2S, NH3, SO2, VOC, etc.) concentrations.

Free White Paper How an eNose Does Work  

The OdoWatch Platform is installed all over the word from desert to northern areas (-20°C to +50°C). All units have weatherproof NEMA 4X enclosures.

In order to correctly monitor atmospheric dispersion, the OdoWatch platform is equipped with a Weather Station installed onsite for continuous weather condition monitoring and recording. Measured weather conditions are wind direction, wind speed, atmospheric pressure, rain, temperature, humidity and solar radiation. The Weather Station must be installed in an area free of weather turbulences caused by adjacent structures.

All devices installed on site transmit their data using eaither GPRS radios or radio wireless communications. Data is transmitted on a continuous and uninterrupted basis. Radio signals are 2.4 GHz frequency hopping spread spectrum (2.4 @ 2.4835GHz) in a master-slave configuration. No radio operating license is normally required .

OdoWatch can be accessed on the internet using a web browser. All odour, contaminant and weather data can be displayed in the OdoWatch interface. The OdoWatch Platform provides email notifications and Alerts points signaling when pre-set olfactory thresholds are exceeded.

odor monitoring Grit Removal 

Installation of the equipment of the OdoWatch platform is done by Odotech technicians. Training for operators and maintenance personnel is provided with corresponding documentation (O&M Manuals). Odotech provide all necessary training for maintenance people and operators.

All equipment installed onsite require either 120 Vac/ 60 Hz or 240 Vac/50Hz. Depending on the type of emission sources, it may be require to install heated lines and gas preparation units to prevent from humidity condensation.For the eNose, SulfNose and Multigas Detectors installation, it can be either on an existing structure or a custom pole. 


Odour Management session at Compost Matters in Atlantic Canada


Compost Matters in Atlantic Canada

FEBRUARY 11th & 12th 2014 - in AMHERST, Nova Scotia, the Compost Council of Canada initiates a grand Canadian tour of technical workshops.

Interesting topics will be covered:

Regulatory Updates: Modernizing the Fertilizers Act & Regulations

Technology and Processing Management:

  • Essentials of Odour Management at Organics Management Facilities

  • Ongoing Updates to the County of Colchester’s Composting System Incorporating Compostable Plastics in Municipal Organics Recycling Programs

Research: The Composting Process as a Means of Controlling Aleutian Disease in Mink

Compost Markets:

  • Lawn & Turf Soil Improvement Utilizing Dehydrated Compost Topdressings and Organic Fertilizers

  • CQA Analyses: How to Interpret and Make Best Use of the Analysis

  • The Compost Quality Alliance: Going Above and Beyond

  • Parameters of Quality 

Odotech is proud to be associated with the Compost Council of Canada to present the segment on the Essentials of Odour Management at Organics Management Facilities. We have prepared a special presentation for composting facilities, anaerobic digestion projects, landfills and others. Key topics will be address to provide attendees a complete tool box from the science of odour perception and odour metrology, odour management planning, odour impact assessment, continuous odour monitoring and odour control. 

how to gage compost odor


Download the registration form


For additional information, please visit, email at or call 1-877-571-4769


Get the pre\u002Dtraining PPTEssentials of organics odour mangement
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