air stripping Applications

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Waste water treatment plants Screening area: stripping

by Chromatotec Group     based in Val de Virvée, FRANCE

Context & Challenges Globally, the wastewater treatment is the first public health issue. Urban development leads to urbanization near waste water treatment plant and extension of sewerage network. These aspects induce to an augmentation of sulfur compounds (H2S, mercaptans and sulfides) which are very corrosive, odorant and toxic. To monitor this compounds online CHROMATOTEC® offers high meteorological solutions. To ensure the safety of operatives in the screening building/area of waste water treatment works an H2S analyzer has been installed in the main building to complement the protection provided by individual monitors. Chromatographic measurements show that other sulfurous compounds including Methylmercaptans are present in the air in addition to H2S.

Wastewater Treatment

by Babcock & Wilcox MEGTEC     based in De Pere, WISCONSIN (USA)

Many industrial and pharmaceutical processes generate wastewater with volatile contaminants that increase the COD and BOD to a point where discharging to municipal wastewater is very costly or not an option. These contaminants can be removed from the water by distillation, substantially lowering the disposal cost, and, in many cases, the removed components can be further purified and reused in the process. MEGTEC offers the following solutions to remove the volatile contaminants and make wastewater suitable for discharge to most municipal wastewater treatment plants: Stripping columns using direct steam or a reboiler Distillation columns using indirect steam heat sources Our technologies have been applied to a range of processes including wastewater treatment from industries such as Pharmaceutical, Semiconductor, Chemical and Petrochemical.

Applications and Air Pollutants Removed for Wastewater Treatment Operations

by Bionomic Industries Inc.     based in Mahwah, NEW JERSEY (USA)

For industrial and municipal treatment plants; Chemical scrubbers, biological towers and adsorption systems to remove hydrogen sulfide, mercaptans, other organic sulfur compounds and ammonia from digesters, pump stations, ponds, grit and screening works, sludge filter presses and dryers. Special Wet Electrostatic Precipitator for sewage sludge incinerators. Stripping ammonia and other volatile compounds. Decarbonization removal of carbon dioxide from wastewater.

Measurement of diacetyl in ambient air to monitor workplace exposure limits.

by MOCON - Baseline     based in Lyons, COLORADO (USA)

The Series 8900 Diacetyl Analyzer provides direct measurement of Diacetyl in ambient air. This instrument is utilized for environmental monitoring and to monitor workplace exposure limits. The Series 8900 Analyzer for Diacetyl employs a photoionization detector (PID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Diacetyl and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. The Diacetyl is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

Measurement of formaldehyde in ambient air for monitoring workplace exposure limits

by MOCON - Baseline     based in Lyons, COLORADO (USA)

The Series 8900 Formaldehyde Analyzer provides direct measurement of Formaldehyde in ambient air. This instrument is utilized in industrial plants to monitor workplace exposure limits. The Series 8900 Formaldehyde Analyzer employs a flame ionization detector (FID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Formaldehyde and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Formaldehyde is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

Measurement of acrylonitrile in ambient air for monitoring workplace exposure limits

by MOCON - Baseline     based in Lyons, COLORADO (USA)

The Series 8900 Acrylonitrile Analyzer provides direct measurement of Acrylonitrile in ambient air. This instrument is utilized in industrial plants to monitor workplace exposure limits. The Series 8900 Acrylonitrile Analyzer employs a flame ionization detector (FID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Acrylonitrile and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Acrylonitrile is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

Products for Airport Weather Station

by Dyacon, Inc.     based in Logan, UTAH (USA)

Situation: Do you use a small airport, private landing strip, or small municipal runway? If you’re lucky, you might have a windsock. That’s okay if you’re on site, but inadequate if your flying in.

Air scrubber wastewater solution

by ENCON Evaporators     based in Hooksett, NEW HAMPSHIRE (USA)

Air Scrubbers strip out contaminants from exhaust stacks typically by trickling a stream of salt solution through a bed of media to extract contaminants by putting them into solution. The salts found in these solutions are typically sulfates, chlorides, and carbonates. Air Scrubber wastewater tends to have high total dissolved solids (TDS) or salts. Air Scrubber Wastewater cannot be simply flushed down the drain. Many companies choose to avoid the headaches of labor-intensive wastewater treatment technologies such as chemical treatment or filtration and simply pay to haul the wastewater. This however, can become quite expensive.

Measurement of hydrogen sulfide & carbon disulfide in air for continous emission monitoring

by MOCON - Baseline     based in Lyons, COLORADO (USA)

The Series 8900 Hydrogen Sulfide and Carbon Disulfide Analyzer provides direct measurement of H2S and CS2 in ambient air. This instrument is utilized for continuous emission monitoring. The Series 8900 H2S and CS2 Analyzer employs a Photoionization detector (PID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the H2S, CS2, and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. H2S and CS2 are separated from potentially interfering components on the analytical column and elute to the detector for analysis.

Applications and Air Pollutants Removed in Wastewater Treatment Operations

by Bionomic Industries Inc.     based in Mahwah, NEW JERSEY (USA)

Removing hydrogen sulfide, mercaptans and other organosulfur compounds from wastewater treatment plant odor causing processes and areas. Stripping of ammonia and other VOC compounds.

Measurement of naphthalene in ambient air to monitor workplace exposure limits & at remediation & Superfund sites

by MOCON - Baseline     based in Lyons, COLORADO (USA)

The Series 8900 Naphthalene Analyzer provides direct measurement of Naphthalene in ambient air. This instrument is utilized in industrial plants to monitor workplace exposure limits and at remediation and Superfund sites. The Series 8900 Naphthalene Analyzer employs a photoionization detector (PID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Naphthalene and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Naphthalene is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

Waste water treatment plants Air quality control by TRS MEDOR

by Chromatotec Group     based in Val de Virvée, FRANCE

Context & Challenges Globally, the wastewater treatment is the first public health issue. Urban development leads to urbanization near waste water treatment plant and extension of sewerage network. These aspects induce to an augmentation of sulfur compounds (H2S, mercaptans and sulfides) which are very corrosive, odorant and toxic. To monitor this compounds online CHROMATOTEC® offers high meteorological solutions. At the entrance of the waste water plants, where the waste water arrives, strongly smelling and polluted air is captured and neutralised by a chemical cleaning process called ‘’Stripping’’. The correct amount of chemical products needed to neutralise the polluted air has to be calculated.

CleanAll Heavy

by PETROGLOBE CO.     based in Cairo, EGYPT

Application : OIL SPILL DISPERSANT :THE BEST SOLUTION TO ELIMINATE THE SEA WATER POLUTION BY SAFE WAY Huge oil tanks. Oil tankers and commercial vessels. Harbors (land ,marine &air strips) Excavators oil wells. Petroleum Rigs and pipes

Sulfide Oxidation with Hydrogen Peroxide (H2O2)

by USP Technologies     based in Atlanta, GEORGIA (US) (USA)

Sulfide Odor Control Sulfide is found throughout the environment as a result of both natural and industrial processes. Most sulfide found in nature was produced biologically (under anaerobic conditions) and occurs as free hydrogen sulfide (H2S) - characterized by its rotten egg odor. We are most likely to encounter biogenic H2S in sour groundwaters, swamps and marshes, natural gas deposits, and sewage collection/treatment systems. Manmade sources of H2S typically occur as a result of natural materials containing sulfur (e.g., coal, gas and oil) being refined into industrial products. For a variety of reasons - aesthetics (odor control), health (toxicity), ecological (oxygen depletion in receiving waters), and economic (corrosion of equipment and infrastructure) - sulfide laden wastewaters must be handled carefully and remediated before they can be released to the environment. Typical discharge limits for sulfide are < 1 mg/L. Sulfide Treatment Alternatives There are dozens of alternatives for treating sulfide laden waters, ranging from simple air stripping (for the low levels present in groundwaters) to elaborate sulfur recovery plants (used to treat several tons per day at refineries and coal burning power plants). There are processes based on biology (using compost filters, scrubbing media, or inhibition/disinfection), chemistry (oxidation, precipitation, absorption, and combination), and physics (adsorption, volatilization, and incineration). Each process occupies a niche which is often defined by the scale and continuity of treatment, whether the sulfide is in solution or is a gas, the concentration of sulfide involved, and the disposition of the sulfide containing medium. However, for reasons relating to convenience and flexibility, chemical oxidation (using hydrogen peroxide) continues to grow in its scope of application. Treatment with Hydrogen Peroxide While other peroxygens such as permonosulfuric (Caro’s) acid, peracetic acid, and persulfates will oxidize sulfide, their use for this application is overkill. Hydrogen peroxide (H2O2) is considerably simpler and more cost-effective. H2O2 may control sulfides in two ways, depending on the application: Prevention - by providing dissolved oxygen which inhibits the septic conditions which lead to biological sulfide formation; and Destruction - by oxidizing sulfide to elemental sulfur or sulfate ion.

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