odor evaluation Articles | Environmental XPRT

Comparison of two standard odor intensity evaluation methods for odor problems in air or water

Government agencies responsible for ensuring healthful water and/or air quality are often faced with resolving public complaints of nuisance odors. Understanding variations in odor intensity may ultimately lead to the establishment and application by such agencies of quantitative limits for effective odorant control. An odor panel was trained in suprathreshold odor intensity evaluation using ...

Jan. 16, 2014

By IWA Publishing

White Paper - Uniqair, Purdue University Odor Lab Develop Odor Sampling Procedure

New Odor Sampling Procedure for high humidity air flow from dryers/coolers A new odor sampling procedure with nitrogen dilution has been developed by Uniqair and Purdue University’s odor lab for odor evaluation of high humidity airflow from petfood dryers, extruder air conveyer (wet cyclones) and coolers. The sample bags will be pre-filled with a specific quantity of ultrapure nitrogen ...

Jan. 23, 2014

By Uniqair Technologies Ltd.

Black-odor water analysis and heavy metal distribution of Yitong River in Northeast China

The black-odor mechanism of Yitong River was analyzed based on survey and monitoring results. We found that organic matter is the main pollution source of Yitong River and its tributaries. A black-odor evaluation model that can describe the pollution of the Yitong River water system was developed, and this model has the parameters I = 0.21 [CODCr] + 0.18 [DO] – 0.36[NH3-N] + 0.91. The model ...

Jun. 23, 2017

By IWA Publishing

Jackson storm cells pilot case study

Performance History and Discussion The City of Jackson (COJ) and Jackson Water Partnership (JWP) selected In-Pipe Technology (IPT) in March 2010 to team with them and implement a beta test project. The principal purpose being to evaluate the microbial technology and benefits of the IPT professional services program for the Savanna WWTP Storm Cells. In-Pipe Professional services include 100% ...

Mar. 3, 2016

By In-Pipe Technology Company, Inc.

Experiences diagnosing a poorly performing bioscrubber and developing solutions

ABSTRACT The City of Escondido owns and operates the Hale Avenue Resource Recovery Facility (HARRF) located at 201 North Broadway in Escondido, California. HARRF receives and treats wastewater from residential, commercial and industrial properties in Escondido. An odor control system consisting of a bioscrubber and mist scrubbers treats 66,000 cubic feet per minute of foul air from the primary ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Options in Odor Control - New Alternatives and Traditional Technologies

Untitled Document Summary: The control of odorous emissions from sewage treatment facilities has long been a major issue, especially for facilities located close to residential areas. As populations grow and expand near the wastewater treatment plants and the collection system facilities that transfer sewage to those plants, efforts to control wastewater odor command an ...

Jan. 1, 2002

By Calgon Carbon Corporation

Real-time monitoring and forecasting of odor after dewatering in wastewater treatment

A real-time odor monitoring system was developed to evaluate and predict odors levels of dewatered solids generated by the District of Columbia Water and Sewer Authority’s (DCWASA) advanced 370 mgd wastewater treatment plant (WWTP) in Washington, DC. Each year, DCWASA generates over 400,000 wet tons of biosolids and recycles these biosolids by applying them to over 20,000 acres of agricultural ...

Oct. 13, 2007

By Water Environment Federation (WEF)

CAIROX Potassium Permanganate - Case Study

BACKGROUND The Carbondale Water Treatment Plant (Carbondale, Illinois) with a design capacity of 8 MGD and an average flow of 4.6 MGD draws its water from Cedar Creek Lake. Because of moderately high raw water TOC levels (4.3 - 6.5 mg/L) and low alkalinity (36 - 40 mg/L as CaCO3), Carbondale is required to attain 45 percent TOC removal under the Disinfection/Disinfection By-Product (D/DBP) Rule. ...

Dec. 30, 2016

By Carus Corporation

Performance evaluation of a low-cost odour trap installed in waterless urinals

Waterless urinals save precious fresh water normally used for flushing and reduce odour levels in restrooms. However, existing models of waterless urinals available on the market are expensive and maintenance costs of the odour traps of these urinals are also quite high. Experiments conducted using a low cost membrane-based waterless-urinal odour prevention trap available in India revealed a ...

May 31, 2016

By IWA Publishing

Effects of Anaerobic Digester Sludge Age on Odors from Dewatered Biosolids

Dewatered sludge cakes from bench scale anaerobic digesters operated at mesophilic temperatures and solids retention times (SRT) ranging from 10 days to 40 days were evaluated for their sulfur odor generation potential. Extracellular Polymeric Substances (EPS) extraction for digested sludge samples was also carried out. Static headspace sulfur gas analysis was successfully used to compare ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Wastewater-Solids Dewatering Odor Control - Case Study

Background The Milan Wastewater Treatment Plant, located just south of Moline, Illinois, is a 1.7 MGD (6,434 m3/day) activated sludge facility with an average wastewater flow of 700,000 gpd to 800,000 gpd. This facility dewaters primary sludge using a belt filter press (Figure 1). The press operates an average of three times per month, 8 hours per day at a pump rate of 100 gpm. The sludge is ...

Aug. 26, 2016

By Carus Corporation

The Role of Decision Making Software in Effective Selection of Project Alternatives

ABSTRACTConducting an alternative analysis study for a public works project can be a difficult process considering that the alternative selected for design and construction must be fully embraced by the project owners and the public. A successful study can position the project for successful implementation and broad public support, while a poor study can create uncertainty for the project. The ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Development of a novel odor measurement system using gas chromatography

This paper describes a novel odor measurement system for creating arrays of virtual chemical sensors with nonoverlapping responses using ultrahigh-speed gas chromatography with a surface acoustic wave sensor (GC/SAW). This GC/SAW system provides high-resolution twodimensional olfactory images for easy recognition of many complex odors. Separation and quantification of the individual chemicals ...

Dec. 3, 2008

By Air & Waste Management Association (A&WMA)

Evaluating odour control technologies using reliability and sustainability criteria - a case study for water treatment plants

Technologies for odour control have been widely reviewed and their optimal range of application and performance has been clearly established. Selection criteria, mainly driven by process economics, are usually based on the air ﬂow volume, the inlet concentrations and the required removal efﬁciency. However, these criteria are shifting with social and environmental issues becoming as ...

Jul. 24, 2014

By IWA Publishing

Extended CSO control storage: what could possibly go wrong?

The Thames Tideway Tunnel (TTT), is one of the main components of the London Tideway Improvements Programme, designed to capture combined sewer overflows (CSOs) which currently discharge untreated combined sewage into the tidal river Thames. CSO discharges would be stored in the tunnel until there is capacity at Beckton sewage treatment works (STW), to accept, for treatment, pumped sewage ...

Jan. 1, 2018

By IWA Publishing

Validation of regulatory micro-scale air quality models: modelling odour dispersion and built-up areas

Gaussian and Lagrangian model runs are evaluated in comparison to field data from the Odour Release and Odour Dispersion (OROD) project and to wind tunnel data from the Mock Urban Setting Test (MUST). Different statistical metrics are discussed. The results illustrate once again that a good model performance is strongly dependent on the model input (e.g., terrain data, roughness length). ...

Dec. 14, 2011

By Inderscience Publishers

Controlling odors from creosote utilizing foam-based technology

From approximately 1910 until the mid-1950s, a creosote plant operated on a 50 acre site in Manville, New Jersey. During its operation, the wood treatment facility treated railroad ties with creosote and discharged the excess creosote via canals to two waste lagoons located on the site. After treatment, wood was stored in areas of the site where excess creosote dripped onto surface soils and ...

Nov. 1, 2008

By Rusmar Inc.

Comparison of different approaches for odour impact assessment: dispersion modelling (CALPUFF) vs field inspection (CEN/TC 264)

Odour impact assessment has become an important environmental issue. Different approaches can be used in order to evaluate the odour impact on receptors, and therefore to regulate it. Among the different possible regulation approaches, the use of dispersion modelling is suggested or required by several national or regional legislations. The wide diffusion of this approach is probably due to the ...

Nov. 1, 2013

By IWA Publishing

Evaluating the potential of an electronic nose for detecting the onset of anaerobic conditions during composting

Most bad odours in composting plants are formed under anaerobic conditions and often they could be avoided if detected early enough. In this project an electronic nose was used to evaluate the odours produced during a composting process at bench scale. The electronic nose consists of an array of electronic chemical sensors with partial specificity and an appropriate pattern recognition system ...

Jan. 2, 2002

By ORBIT e.V.

Comprehensive Odor Emissions Study Hall Street Wastewater Treatment Plant Concord, New Hampshire

ABSTRACTThe operation of the Hall Street wastewater treatment plant (WWTP) in Concord, NH has caused the emission of objectionable odors from various liquid and solids treatment processes resulting in periodic odor complaints from its neighbors. The City of Concord retained Fay, Spofford & Thorndike (FST) to conduct a comprehensive odor emissions study at the Hall Street WWTP and to recommend ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Subscribe to our eBulletins