Odor Control System Research Articles

Electronic noses for environmental monitoring applications.

Electronic nose applications in environmental monitoring are nowadays of great interest, because of the instruments' proven capability of recognizing and discriminating between a variety of different gases and odors using just a small number of sensors. Such applications in the environmental field include analysis of parameters relating to environmental quality, process control, and verification of efficiency of odor control systems. This article reviews the findings of recent scientific studies in this field, with particular focus on the abovementioned applications. In general, these studies prove that electronic noses are mostly suitable for the different applications reported, especially if the instruments are specifically developed and fine-tuned. As a general rule, literature studies also discuss the critical aspects connected with the different possible uses, as well as research regarding the development of effective solutions. However, currently the main limit to the diffusion of electronic noses as environmental monitoring tools is their complexity and the lack of specific regulation for their standardization, as their use entails a large number of degrees of freedom, regarding for instance the training and the data processing procedures.

Pilot Test of a UV-enhanced Biological Odor Control System

Pilot Test of a UV-enhanced Biological Odor Control System

Pilot Test of a UV Odor Control System at the Ulu Pandan WRP, Singapore

Pilot Test of a UV Odor Control System at the Ulu Pandan WRP, Singapore

Maximizing your Odor Control Resources: Optimizing Granular Activated Carbon for Odor Control to be a Good Neighbor

Maximizing your Odor Control Resources: Optimizing Granular Activated Carbon for Odor Control to be a Good NeighborGranular Activated Carbon (GAC) is used by the City of North Las Vegas, NV and the Township of Ocean Sewerage Authority, NJ as part of their odor control systems at their wastewater treatment facilities. Odor control systems symbolize a facility's goal to be a good neighbor to its surrounding community. GAC systems have historically been very effective at mitigating fugitive odors generated at...Author(s)Samantha HanzelJames KerriganKenny EickelbergSourceProceedings of the Water Environment FederationDocument typeConference PaperPublisherWater Environment FederationPrint publication date Oct, 2013ISSN1938-6478DOI10.2175/193864713813685827Volume / Issue2013 / 12Content sourceWEFTECCopyright2013Word count168

Composting provides a sustainable solution to the biosolids issues in Shenyang, China

Shenyang Biosolids Composting Plant is a one-of-a-kind facility that is designed to handle and treat up to 1,000 tonnes of 80% moisture content wet biosolids per day from four municipal wastewater treatment plants (WWTPs) that have a combined capacity of 1,600 MLD in Shenyang City, Liaoning Province, China. The composting plant covers an area of approximately 130,000 m2. The moisture content of biosolids will be reduced to 35% by biodrying. The main facilities in the plant include the materials handling and mixing system (for wet sludge, raw material and compost), the agitated composting bed system, the ventilation and odor control system, the truck scale unit, the storerooms (for raw material and product), and the other auxiliary facilities. The design has incorporated the necessary environmental considerations for the protection of workers’ health and safety as well as the potential impacts on the neighboring communities. The finished compost product will be sold as soil amendment and/or auxiliary fuel. In comparison with other technologies, this plant is favored for the low capital cost (0.279 million RMB per wet tonne of sludge), the low operating cost (173.13 RMB per wet tonne sludge) and the low energy consumption/carbon footprint. The plant is currently under construction. The installation works of No.3 composting train is scheduled to be carried out in June 2012. When the plant is commissioned in September 2012, it will become a sustainable solution to the sludge problem in Shenyang City.

Abu Dhabi's strategic tunnel enhancement programme: odour extraction system approaches

The Emirate of Abu Dhabi has experienced tremendous growth since the mid-1970s resulting in significant overloading of its existing sewerage system. Master planning determined that the best long-term wastewater collection and conveyance solution was construction of a deep tunnel sewer system. Implementation of this massive project faced numerous challenges, including the goal of no odours and limited odour control facilities. To accomplish this, the consultant team examined a unique approach of a single odour control system installed at the proposed downstream tunnel pumping station. Rigorous analysis utilising computer-based models confirmed the viability of this approach. However, other approaches including multiple satellite (localised or regional) odour extraction systems were considered. To better understand entrained air forces at vortex drops, and to confirm the preferred odour extraction approach, physical modelling of drop structures and overall tunnel system was implemented. Results and findings concluded that a regional odour extraction system approach was preferred over a single (centralised) extraction approach. This paper focuses on the process of selecting the preferred odour extraction approach and preliminary capacity sizing of regional systems.

Towards an odour control system combining slurry sorption and electrochemical regeneration

It was demonstrated that ethanethiol could be continuously removed from a gas stream with a unit that combined slurry sorption with in-stream regeneration of the adsorbent for re-use. The regeneration process led to the electrochemical oxidation of adsorbed species and the restoration of the adsorbent's active surface area. The unit was tested with a 22.4lmin−1 challenge gas stream containing 100ppm ethanethiol and operated at current densities ranging from 0 to 4mAcm−2. Removal of ethanethiol varied with applied current and reached 69% removal at 4mAcm−2. In this system, it was shown that mass transfer by chemical reaction with free chlorine generated in the anode was the dominant effect with physical mass transfer modelled as only contributing between 2.5% and 9% removal. It was demonstrated by mass balance that the gaseous sulfur challenge component removed was transferred into the aqueous phase by the system and the sulfur removed persisted in this aqueous phase most probably in the form of thiosulfinates, thiosulfonates and sulfates.

Improving Energy and Operational Efficiency in Odor Control Systems

Improving Energy and Operational Efficiency in Odor Control Systems

Lessons Learned from Activated Carbon Odor Control Systems

Lessons Learned from Activated Carbon Odor Control Systems

Precision & Accuracy of Odor Control System Performance Tests

Precision & Accuracy of Odor Control System Performance Tests

Synthetic musk emissions from wastewater aeration basins

Wastewater aeration basins at publicly owned treatment works (POTWs) can be emission sources for gaseous or aerosolized sewage material. In the present study, particle and gas phase emissions of synthetic musks from covered and uncovered aeration basins were measured. Galaxolide (HHCB), tonalide (AHTN), and celestolide (ADBI) were the most abundant, ranging from 6704 to 344,306 ng m−3, 45–3816 ng m−3, and 2–148 ng m−3 in the gas phase with particle phase concentrations 3 orders of magnitude lower. The musk species were not significantly removed from the exhaust air by an odor control system, yielding substantial daily emission fluxes (∼200 g d−1 for HHCB) into the atmosphere. However, simple dispersion modeling showed that the treatment plants are unlikely to be a major contributor to ambient air concentrations of these species. Emission of synthetic musk species during wastewater treatment is a substantial fate process; more than 14% of the influent HHCB is emitted to the atmosphere in a POTW as opposed to the <1% predicted by an octanol–water partition coefficient and fugacity-based US EPA fate model. The substantial atmospheric emission of these compounds is most likely due to active stripping that occurs in the aeration basins by bubbling air through the sludge.

Performance Testing of a Biotrickling Filter/Chemical Scrubber Odor Control System at Western Australia's Largest WTTP

In 2006 the Water Corporation of Western Australia formed the W2W Alliance (W2WA) to deliver a five-year $352 million program of upgrades to the State’s three largest metropolitan wastewater treatment plants (WWTPs). At the Woodman Point WWTP, W2WA was tasked with installing best practice odor control to achieve a 50 percent reduction in odor emmissions. The Stage 1 odor control improvements involve new covers of the grit tanks, sealing existing covers at the primary treatment area, and new covers and extraction systems for sludge treatment areas and SBR anoxic zones. Biotrickling filters followed by chemical scrubbers offered the best solution for treating the extracted air. The Stage 1 commissioning in 2009 was very successful with no odor incidents during startup of the facilities. The biotrickling filters acclimated faster than expected and reduced inlet hydrogen sulfide (H2S) as high as 80 parts per million (ppm) to less than 0.5ppm. Biotrickling filter performance testing showed outlet odor ranging from 1,020 to 3,160 Odor Units (OU), which met the requirment of 5,000 OU. The odor reduction goal of greater than 95 percent was also achieved. Chemical scrubber performance testing showed inlet H2S as high as 37ppm reduced to less than 0.05ppm, which met the 0.1ppm requirement. Odor removal was relatively good, but some stack outlet samples were above the 1,000OU goal. When the combined system is tested, it is expected that the outlet odor goal can be met when the chemical scrubber is receiving lower inlet loads.

Denver Metro's Solids Processing Buildings Ionized Air Odor Control Systems Eliminate Odor with Ninety-Eight Percent Less Power and Carbon Emissions than Traditional Capture and Treat Technologies

Denver Metro's Solids Processing Buildings Ionized Air Odor Control Systems Eliminate Odor with Ninety-Eight Percent Less Power and Carbon Emissions than Traditional Capture and Treat Technologies

Design, Commissioning and Operation of the Odor Control Systems for the Pine Creek Wastewater Treatment Plant

Design, Commissioning and Operation of the Odor Control Systems for the Pine Creek Wastewater Treatment Plant

Reduction of Air Toxics from Digester Gas-Fired IC Engines at WWTPs

Reduction of Air Toxics from Digester Gas-Fired IC Engines at WWTPsMajor sources of emissions at a wastewater treatment plant typically include combustion sources (internal combustion engines, boilers, flares, emergency diesel generators and turbines). At the two wastewater treatment plants owned and operated by the Orange County Sanitation District (OCSD), natural and digester gas-fired internal combustion (IC) engines are the major emitters of toxic air...Author(s)Kit LiangVladimir KoganEdward TorresSourceProceedings of the Water Environment FederationSubjectSession 3: Odor and Emission Control Systems IDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2008ISSN1938-6478SICI1938-6478(20080101)2008:4L.204;1-DOI10.2175/193864708788808050Volume / Issue2008 / 4Content sourceOdors and Air Pollutants ConferenceFirst / last page(s)204 - 216Copyright2008Word count304

Reducing Capital Costs by Varying Odor Control System Velocity

Reducing Capital Costs by Varying Odor Control System VelocityOdor control equipment is important to the wastewater industry throughout the world. It allows wastewater plants and collection systems to operate with minimal impact on the surrounding regions. One very prominent technology is engineered dry-scrubbing media. This media consists of various base materials formed into spherical media through the processes of agglomeration and impregnation. The base...Author(s)W. Bradford M. StanleyColin ChristieSourceProceedings of the Water Environment FederationSubjectSession 10: Regulatory Issues, Sustainability, and Greenhouse GasesDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2008ISSN1938-6478SICI1938-6478(20080101)2008:4L.798;1-DOI10.2175/193864708788807952Volume / Issue2008 / 4Content sourceOdors and Air Pollutants ConferenceFirst / last page(s)798 - 805Copyright2008Word count238

Denver Metro's Solids Processing Buildings Ionized Air Odor Control Systems Successfully Eliminate Odor with Ninety-Eight Percent Less Power than Capture and Treat Systems

Denver Metro's Solids Processing Buildings Ionized Air Odor Control Systems Successfully Eliminate Odor with Ninety-Eight Percent Less Power than Capture and Treat SystemsPolarized air ionizing hardware that produces positively and negatively charged oxygen molecules, or ions, but no ozone. will be discussed. This European technology has been successfully applied at wastewater facilities in Europe for over twenty years. Operating systems in the US now have a successful track record of over six years. The ionized air effectively oxidizes hydrogen sulfide, ammonia,...Author(s)Dennis TulenkoMichael CarverSourceProceedings of the Water Environment FederationSubjectSession 69: Management of Odors and Air EmissionsDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2008ISSN1938-6478SICI1938-6478(20080101)2008:11L.5350;1-DOI10.2175/193864708788804595Volume / Issue2008 / 11Content sourceWEFTECFirst / last page(s)5350 - 5358Copyright2008Word count276

Hydrogen Sulfide Continuous Emission Monitoring of Odor Control Systems

Hydrogen Sulfide Continuous Emission Monitoring of Odor Control Systems

Clark County Water Reclamation District Uses The Results of the Biofilter Testing and Monitoring Program to Correct Biofilter Design Problems and Rehabilitates Seven Biofilters for a Fraction of the cost of New Odor Control Systems Clark County Water Reclamation District

Clark County Water Reclamation District Uses The Results of the Biofilter Testing and Monitoring Program to Correct Biofilter Design Problems and Rehabilitates Seven Biofilters for a Fraction of the cost of New Odor Control Systems Clark County Water Reclamation District

Advancing Odor Control to New Levels Gurnee Sewage Treatment Plant North Shore Sanitary District

Advancing Odor Control to New Levels Gurnee Sewage Treatment Plant North Shore Sanitary DistrictThe North Shore Sanitary District (District) owns and operates a 24-mgd sewage treatment plant located in Gurnee, Illinois. Frequently, odors from the two-stage activated sludge plant's solids handling facilities made their way into the adjacent residential neighborhood. A new two-stage odor control system for the plant's solids handling facility was put on-line in October 1999. This system...Author(s)Brian JensenDavid SpethBrian DornThomas CardSourceProceedings of the Water Environment FederationSubjectSession 57: Management of Odors and VOCs: Control of Odors and VOCsDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2006ISSN1938-6478SICI1938-6478(20060101)2006:8L.4432;1-DOI10.2175/193864706783779014Volume / Issue2006 / 8Content sourceWEFTECFirst / last page(s)4432 - 4439Copyright2006Word count420