In this work, a patented biofilter media is used in treating air contaminated with ammonia (NH
3
). The data shows up to 200 ppm of NH
3
can be removed with over 93% removal efficiency at 30 s Empty Bed Residence Time (EBRT). At the start–up conditions, the results also indicated that the humidifier can be utilised for buffering concentration fluctuations. The design correlation developed based on the zero–order model can be used as a preliminary estimate for sizing biofilters for NH
3
removal. The results show that predictions using the design correlation are in good agreement with the experimental data.
Keywords: biofilters, humidifiers, ammonia removal, synthetic media, air pollution
Abstract
Biorem has successfully demonstrated its high rate odour control system for biosolids exhausts at Ashbridges Bay sewage treatment plant in Toronto, Ontario. The demonstration used XLD™, a biofiltration media engineered specifically for biosolids odours. The system has achieved 95% odour removal in less than 20-s Empty Bed Residence Time (EBRT) despite high concentration of organic sulphur compounds (OSC), and has proven its effectiveness over more than 2 years of operation. OSC removal efficiencies...
ABSTRACT
Ammonia is a colorless, toxic, reactive and corrosive gas with a sharp odor. It is irritating to the skin,
eyes, nose, throat, and lungs. Ammonia gas occurs in the environment naturally and is emitted by
many industries and, therefore, its control is essential. Biofiltration is a new emerging technology that
is being used as a control procedure. This study evaluates the use of a mixture of compost, sludge, and
pieces of PVC as biofilter media to remove ammonia gas. The study investigates the...
The Rockland County (New York) Cocomposting Facility began operations in February, 1999, processing biosolids from the five publicly owned treatment works (POTWs) in the county. The Rockland County Solid Waste Management Authority (RCSWMA) owns the facility, but contracted with Waste Management of New York to design, build and operate (DBO) the 110 wet tons/day agitated bin composting facility located in Hilburn. From the earliest stages of development,
RCSWMA has focused on odor control provisions for the...
The Halifax Regional Municipality (HRM) in Nova Scotia took a giant leap in 1998 to reaching a 50 percent diversion goal by 2000. Between July and November, 1998, organics collection carts were distributed to almost 100,000 households in the region. In December, two new composting facilities designed to process those materials, as well as feedstocks from the commercial sector, opened their doors.
“The Halifax Regional Municipality’s new integrated solid waste-resource management system is ‘leading edge’ in all...
Biofilters are the odor control system of choice at composting facilities. Despite similar capital costs, the biofilters are generally less costly to operate than chemical scrubbers. The key to keeping operating costs in check, however, is to get the maximum use out of the biofilter media, thus avoiding the time and money needed to do media replacements.
Allen Boyette, senior engineer and manager of the Cary, North Carolina office of E&A Environmental Consultants, Inc., tackled the topic, “Building Longevity...
The largest composter in the state of Washington, Cedar Grove Compost Company in Seattle, had its hands full of challenges in 1997 — confronted with a half million dollar fine, a lawsuit, and angry neighbors. With the adoption of an Environmental Management System (EMS), the compost facility has turned its precarious situation around and stayed in business, while dramatically cutting odor problems. With a generally satisfactory full year under its belt, the composter is looking forward to even better results in...
Cost-efficient solution for smell emission reduction
The enormous waste quantities that are produced day by day are one of the most difficult problems for the economy as such, for cities and communities and for private households. Storage capacities for waste are scarce everywhere. Therefore solutions of all kinds that reduce waste quantities or recycle waste materials to be reused in the material cycle are top priority for all concerned. For some time now, compost production has been a widely used approach to...
The implementation of a waste minimisation strategy at Korvest Galvanisers has immediately improved the company`s `bottom line`, and made it more competitive. Employee training on waste minimisation has led to an improvement in processing and product quality. Cost savings from changes to work practices are estimated at around $100,000 per annum.
Background
Korvest Galvanisers is a publicly listed company and the largest hot dip galvaniser in South Australia. The company has been operating at its present site...
It may be necessary to know other subsurface information to remediate fuels in ground water. Treatability testing to characterize contaminant biodegradability and nutrient content may be needed for any biodegradation technology. A subsurface geologic characterization would be particularly important to characterize the migration of NAPLs. Recovery tests are usually necessary to design a product/ground water pumping scheme that will ensure that the nonaqueous fuel layer can be recovered and that contaminated ground...
Abstract This paper presents data on the source of PCDDs/PCDFs in cement plant stack emissions, demonstrating that these emissions are not necessarily all created by the process. The data potentially demonstrates that some of the PCDDs/PCDFs in the emissions are pre-existing dioxins and furans that are vaporized out of the kiln raw feed. This calls into question the assumption that PCDD/PCDF emissions can be decreased below a certain point. The EPA has acknowledged resuspended PCDD/PCDF emissions, such as from...
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