Biotretment of polluted air of a storage for used plastics in bio-trickling filter (BTF)
Courtesy of LEVAPOR GmbH, Biofilm Technologies
High concentrations of unhealthy sporogenic funghi and bacteria in malodorous gases of a used plastic storage could not be purified by classical compost filters, because of their high emissions of microorganisms.
By indoor-biofiltration in a bio-trickling filter using microbially activated LEVAPOR carrier the polluted air has cleaned until the required quality and recycled.
Performance of plastic- and sponge-based trickling filters treating effluents from an UASB reactor
The paper compares the performance of two trickling filters (TFs) filled with plastic- or sponge-based packing media treating the effluent from an upflow anaerobic sludge blanket (UASB) reactor. The UASB reactor was operated with an organic loading rate (OLR) of 1.2 kgCOD m−3 d−1, and the OLR applied to the TFs was 0.30–0.65 kgCOD m−3 d−1 (COD: chemical oxygen demand). The sponge-based packing medium (Rotosponge) gave substantially better performance for ammonia, total-N, and...
63 Percent Diversion and Rising
Untitled Document The City and County of San Francisco is making great strides towards its 75 percent diversion goal, using a 3-stream sort system for residential compostables, recyclables and trash, and an aggressive commercial and institutional program for food scraps. BIOCYCLE has been tracking the evolution of the City and County of San Francisco's recycling and composting initiatives for almost ten years. San Francisco has been a pioneer in source separated organics diversion. It...
How to choose the best laboratory for your microbiology analysis
For indoor air quality professionals, choosing a good microbiology lab is one of the most important business decisions you can make. How do you know that the fungal data that you are receiving is accurate? Will it stand up in court? Has an educated, experienced, trained analyst actually thought about your sample and your project, understood what you were looking for, and then used their knowledge to answer the question you were asking? The answers to these questions can mean the difference between winning...
Emissions Trading under Attack
From California to New Jersey, environmentalists and politicians are rounding on emissions trading programmes. David Biello reports Even as the Bush administration continues to build support for market mechanisms to solve air pollution issues – under his Clear Skies initiative – emissions trading schemes from California to New Jersey are under attack from environmentalists, citizen advocacy groups and state governments. In New York State, Governor George Pataki is continuing a legal battle over the trading of...
Results of Full-Scale Installation and Comparison of Biofilter Operation (PDF)
ABSTRACTBio·Reaction Industries LLC. (BRI) has completed a two-phase project for the design, testing and installation of a biofiltration unit to degrade volatile organic compounds (VOCs) including benzene, toluene, xylenes, ethyl benzene, hexanes, MEK, MIBK, acetone and certain alcohols to reduce emissions from a paint manufacturing facility in Eugene, Oregon. The initial biofilter installed was a modular design with a maximum airflow capacity of 5,000 cubic feet per minute (cfm) and 10-ft x 14-ft x 16-feet...
Noise Monitors and Meters
Sound level meters Description and ApplicationsThe sound level meter is a lightweight instrument for the measurement of sound pressure level (SPL) in decibels. All ANSI-approved meters meet minimum requirements that include an A-weighted network, a slow-response meter characteristic, and a fully graduated scale with measurements ranging from 80 to 130 dBA. The Type II meter is most frequently used. Applications are in worker exposure and noise evaluations. Octave Band AnalyzerSome sound level meters may have...
Environmental Effects of Acid Rain
Air Pollution Creates Acid Rain Scientists have discovered that air pollution from the burning of fossil fuels is the major cause of acid rain. Acidic deposition, or acid rain as it is commonly known, occurs when emissions of sulfur dioxide (SO2) and oxides of nitrogen (NOx) react in the atmosphere with water, oxygen, and oxidants to form various acidic compounds. This mixture forms a mild solution of sulfuric acid and nitric acid. Sunlight increases the rate of most of these reactions. These compounds then...
Introduction The leak repair requirements, under Title VI Section 608 of the Clean Air Act Amendments of 1990, require that when an owner or operator of an appliance that normally contains a refrigerant charge of more than 50 pounds discovers that refrigerant is leaking at a rate that would exceed the applicable trigger rate during a 12-month period, the owner or operator must take corrective action. The Clean Air Act also requires that refrigerant vented into the atmosphere during installation, service or...
Radiation Monitors and Meters
Light Description and Applications The light meter is a portable unit designed to measure visible, UV, and near-UV light in the workplace. (The CTC has a UV light meter available through its loan program, ALEP.) The light meter is capable of reading any optical unit of energy or power level if the appropriate detector has been calibrated with the meter. The spectral range of the instrument is limited only by the choice of detector. Steady-state measurements can be made from a steady-state source using the...
Spray Painting: GT Motors
Background GT Motors (GTM) is a small panel beating and spray painting workshop established in 1964, with a current of workforce of four. GTM currently repairs and refinishes approximately 30 cars a month from a largely private and growing customer base. Like many environmentally responsible operators, the firm reuses and recycles as much of the wastes generated in their workshop as possible, and is generally receptive to ideas on how to improve its environmental and business performances. The Projects GTM...
Minimisation of Hazardous Waste: Bayer Formulation Plant
Background Bayer Australia Limited formulates agricultural and veterinary products for the Australian and New Zealand markets at their Wyong Formulation Plant in NSW. Due to the nature of the materials the company has adopted a vigorous approach towards monitoring the quality and minimising the quantity of the waste it generates. In January 1992 the company launched a waste minimisation program aimed at reducing its hazardous waste generation rate from 14 kg per tonne to 5 kg per tonne of product by 1996....
Acid Rain Program: SO2 Allowance Trading System Fact Sheet
The innovative, market-based SO2 allowance trading component of the Acid Rain Program allows utilities to adopt the most cost-effective strategy to reduce SO2 emissions at units in their systems. The Acid Rain Program operating permit outlines the specific program requirements and compliance options chosen by each source. Affected utilities are also required to install systems that continuously monitor emissions of SO2, NOx, and other related pollutants in order to track progress, ensure compliance, and provide...
Air Emissions/Off-Gas Treatment
A number of technologies have been widely applied for removal of VOCs from off-gas streams. However, the application of these technologies to off-gases from site remediation may be quite limited. Biofiltration has been widely applied for VOC destruction in Europe and Japan, but it has only recently been used in the United States. Catalytic and thermal oxidation are widely used for the destruction of gas-phase VOCs in U.S. industry, yet have only limited applications to site remediation of off-gases. Vapor phase...
Sources of PCDDs/PCDFs In Cement Kiln Emissions
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...