A Smelly Situation: Snuffing Out H2S in Water and Air
Courtesy of Calgon Carbon Corporation
Dealing effectively with hydrogen sulfide (H2S) in groundwater presented a major challenge for coastal Indian River County, Fla. Stripping the odorous substance from the water was only half the solution; keeping the smell from drifting through the air in the neighborhood was the other half.
Like most central
Florida communities, Indian River relies on deep wells to withdraw water from
the Floridan aquifer. The inland supplies are fresh water, and the coastal resource
is typically high in total dissolved solids (TDS) and chlorides. Both the fresh
and saline water supplies contain high concentrations of H2S.
Coastal Resources Exploitation can Mask Bottom–up Mesoscale Regulation of Intertidal Populations
We describe the spatial distribution patterns of rocky intertidal Patella spp. limpets (heavily collected by shellfishers) and top-shell snails belonging to the genus Osilinus (comparatively slightly harvested) through a multiscaled sampling design spanning five orders of magnitude of spatial variability (from 10s of m to 100s of km) throughout the Canarian Archipelago (eastern Atlantic); where rocky intertidal assemblages on opposite sides of the Archipelago (western vs. eastern islands) are subjected to different...
Degradation of wine industry wastewaters by photocatalytic advanced oxidation
ABSTRACTWine industry wastewaters contain a high concentration of organic biodegradable compounds as well as a great amount of suspended solids. These waters are difficult to treat by conventional biological processes because they are seasonal and a great flow variation exists. Photocatalytic advanced oxidation is a promising technology for waters containing high amounts of organic matter. In this study we firstly investigated the application of H2O2 as oxidant combined with light (artificial or natural) in order...
Water Industry on the Eco Wave?
A wave of privatization is rolling through the water industry – at the environment‘s expense? In order to provide an answer to this question, the Environmental-Rating agency oekom research AG, Munich, put a number of water supply companies and manufacturers of water appliances to the environmental test. In results published today, oekom identifies the British water supplier Severn Trent as the environmental leader of the water supply group with a B grade in the overall Environmental-Rating. The Austrian water...
Odor Control Advances at Composting Facility
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...
Halogenated Volatile Organic Compounds
Sites where halogenated VOCs may be found include burn pits, chemical manufacturing plants or disposal areas, contaminated marine sediments, disposal wells and leach fields, electroplating/metal finishing shops, firefighting training areas, hangars/aircraft maintenance areas, landfills and burial pits, leaking collection and system sanitary lines, leaking storage tanks, radioactive/mixed waste disposal areas, oxidation ponds/lagoons, paint stripping and spray booth areas, pesticide/herbicide mixing areas, solvent...
Environmental Situation in Africa
Abstract Africa The economic and social needs of Africa depends more on its environmental resources but these natural resources are seriously declining and that is really effecting the entire region. Sustainable development in this rapidly changing region has become an imperative, and must take place in the complex context of a diverse and changing ecosystem, political transition and evolution toward market economies. The region is heading towards integrating environmental components into sectors like...
Where I live, in eastern, northern, southeastern Pennsylvania (you figure it out), nights are beginning to chill. I`ve noticed this for two reasons. First, the temperature is dipping below 50. Second, insects have begun finding their way inside the house. We capture most of the little buggers and release them but sooner or later someone reaches for a pesticide. We`ve already dealt with fleas on my son`s cat who recently moved home with him. Now, let`s understand something. Pesticide is a general term for more...
Optimization of the Industrial Process of Production of Lactic Acid and its Derivatives from Dairy ...
Abstract Object of the work was the setting up of an industrial process for the re-use of whey, a waste deriving from cheese processing. Through the production of lactic acid and its derivatives, it seems economically interesting to solve this problem, usually linked to hard environmental impact. Foreword: The Whey Whey is the by-product of the traditional cheese and casein processing: out of the total volume of processed milk, 80% to 90% leaves the process as whey, which contains about 50% of solids originally...
In Situ Physical/Chemical Treatment for Ground Water and Leachate
The main advantage of in situ treatments is that they allow ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ processes, however, generally require longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more difficult to verify. Physical/chemical treatment uses the physical properties of the contaminants or the contaminated...
Properties and Behavior of Nonhalogenated VOC`s
An important consideration when evaluating a remedy is whether the compound is nonhalogenated or halogenated. A nonhalogenated compound is one which does not have a halogen (e.g., fluorine, chlorine, bromine, or iodine) attached to it. The vendor of the technology being evaluated must be informed whether the compounds to be treated are nonhalogenated or halogenated. In most instances, the vendor needs to know the specific compounds involved so that modifications to technology designs can be made, where appropriate...
Properties and Behavior of Halogenated VOCs
An important consideration when evaluating a remedy is whether the compound is halogenated or nonhalogenated. A halogenated compound is one onto which a halogen (e.g., fluorine, chlorine, bromine, or iodine) has been attached. The nature of the halogen bond and the halogen itself can significantly affect performance of a technology or require more extensive treatment than for nonhalogenated compounds. As an example, consider bioremediation. Generally, halogenated compounds are less amenable to bioremediate than...
Properties and Behavior of Fuels
Fuel contaminants are generally nonhalogenated. Information presented for nonhalogenated VOCs and nonhalogenated SVOCs may also be appropriate for many of the fuel contaminants presented in this subsection. Contamination by fuel contaminants in the unsaturated zone exists in four phases: vapor in the pore spaces; sorbed to subsurface solids; dissolved in water; or as NAPL. The nature and extent of transport are determined by the interactions among contaminant transport properties (e.g., density, vapor pressure,...
Integrated Environmental Management in a German Brewery
Case Study Name of company: Neumarkter LammsbräuSector: BreweryNumber of employees: 80Country: Germany AbstractNeumarkter Lammsbräu is an 80-employee brewery located in Bavaria, a German region which has a strong tradition for beer. At the beginning of the 1970s, agriculture in the region became increasingly intensive. The quality of beer was being sacrificed for quick and high returns on sales. Neumarkter Lammsbräu wanted to safeguard the quality of its products and develop a strategy for success. The company...
Containment for Soil, Sediment, and Sludge
Containment treatments are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards, unrealistic cost, or lack of adequate treatment technologies. Containment treatments offer quick installation times and...
Introduction The energy level of some types of radiation is high enough so that when they interact with matter they cause the formation of electrically charged particles or ion-pairs and break molecular bonds. These so-called ionising radiations are by their nature potentially harmful to life; at high doses they can be lethal and at lower doses can cause genetic damage. Ionising radiation occurs naturally, and life on Earth has always been exposed to it. Human activities can, however, enhance exposure, and new...
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...
Wastewater Treatment: Overview and Background
SummaryWaste discharges from municipal sewage treatment plants are a significant source of water quality problems throughout the country. States report that municipal discharges are the main source of impairment to estuaries and coastal waters, the second leading source of impaired rivers and streams, and also are a major source of pollution in lakes. Pollutants associated with municipal discharges include nutrients (which can stimulate growth of algae that deplete dissolved oxygen in surface water), bacteria and...