Amerfioc Polyelectrolyte used to enhance liquid/solid separation by Ashland hemical drew industrial America norit Former name of Norit Americas in American Well works Former name of amwell i Ameroid Polyelectrolyte used to enhance liquid/solid separation by Ashland Chemical. Drew Division. Amersep Coagulants and metal precipitants used in water and wastewater treat ment by Ashland Chemical, Drew Industrial amines A group of compounds that are derivatives of ammonia with a hydrocarb group replacing one or more of the hydrogen atoms amino acid A group of organic acids containing an amino group(NH2) and a carboxyl group(COOH) that link together to form the proteins necessary for all life Aminodan M Process Process water treatment and recovery process by Biothane AmmonAsorb TM Activated carbon product by Waterlink/Barnebey Sutcliffe ammonia A compound of hydrogen and nitrogen that occurs extensively in nature Chemical formula is Nh ammonia nitrogen The quantity of elemental nitrogen present in the form of ammonia and the ammonium ion ammoniator A device used to feed gaseous ammonia. ammonification Bacterial decomposition of organic nitrogen to ammonia. ammonium ion A form of ammonia found in solution, the ion Nh+. ammonium nitrate A cystalline salt used as a source of nitrogen in the manufac Ire of some fertilizers and explosives. Chemical formula is NH,NO amoeba A single-celled protozoan microbe. Also spelled"ameba. amoebiasis See"amoebic dysentery. Also spelled"amebiases amoebic dysentery A form of dysentery caused by a protozoan parasite, usually resulting from poor sanitary conditions and transmitted by contaminated food or water. Also spelled"amebic dysentery amoebicide Any substance used to kill amoebas, either medicinally for treatment of amoebic dysentery or to sterilize water. Also spelled"amebicide. amorphous Non-crystalline, having no ite shape or form. AMOS Air Management Oversight System amperometric titrator Titration device containing an internal indicator or elec trometric device to show when the reactions are complete amphibian (1)A member of the Amphibia class of cold blooded, scaleless verte- brates which includes frogs and salamanders. (2)A plant or animal that can live both on land or in water Amphidrome m Fixed-film sequencing batch biological filter by Tetra Process Technologie Ampho-MagTM Magnesia compound to absorb and buffer chemical spills by Pre mier chemicals amphoteric Capable of reacting in water either as a weak acid or weak base. AMSA Association of Metropolitan Sewer(age) Agencies
Amerfloc® Polyelectrolyte used to enhance liquid/solid separation by Ashland Chemical, Drew Industrial. America Norit Former name of Norit Americas Inc. American Well Works Former name of Amwell Inc. Ameroid Polyelectrolyte used to enhance liquid/solid separation by Ashland Chemical, Drew Division. Amersep® Coagulants and metal precipitants used in water and wastewater treatment by Ashland Chemical, Drew Industrial. amines A group of compounds that are derivatives of ammonia with a hydrocarbon group replacing one or more of the hydrogen atoms. amino acid A group of organic acids containing an amino group (NH2) and a carboxyl group (COOH) that link together to form the proteins necessary for all life. Aminodan™ Process Process water treatment and recovery process by Biothane Corp. AmmonAsorb™ Activated carbon product by Waterlink/Barnebey Sutcliffe. ammonia A compound of hydrogen and nitrogen that occurs extensively in nature. Chemical formula is NH3. ammonia nitrogen The quantity of elemental nitrogen present in the form of ammonia and the ammonium ion. ammoniator A device used to feed gaseous ammonia. ammonification Bacterial decomposition of organic nitrogen to ammonia. ammonium ion A form of ammonia found in solution, the ion NH4+. ammonium nitrate A cystalline salt used as a source of nitrogen in the manufacture of some fertilizers and explosives. Chemical formula is NH4NO3. amoeba A single-celled protozoan microbe. Also spelled “ameba.” amoebiasis See “amoebic dysentery.” Also spelled “amebiases.” amoebic dysentery A form of dysentery caused by a protozoan parasite, usually resulting from poor sanitary conditions and transmitted by contaminated food or water. Also spelled “amebic dysentery.” amoebicide Any substance used to kill amoebas, either medicinally for treatment of amoebic dysentery or to sterilize water. Also spelled “amebicide.” amorphous Non-crystalline, having no definite shape or form. AMOS Air Management Oversight System. amperometric titrator Titration device containing an internal indicator or electrometric device to show when the reactions are complete. amphibian (1) A member of the Amphibia class of cold blooded, scaleless vertebrates which includes frogs and salamanders. (2) A plant or animal that can live both on land or in water. Amphidrome™ Fixed-film sequencing batch biological filter by Tetra Process Technologies. Ampho-Mag™ Magnesia compound to absorb and buffer chemical spills by Premier Chemicals. amphoteric Capable of reacting in water either as a weak acid or weak base. AMSA Association of Metropolitan Sewer(age) Agencies
anabatic wind A localized wind that flows up valley or mountainous slopes, usually in the afternoon, caused by the replacement of cool valley air with the warmer. heated air above it. nabiosis A temporary state of suspended animation undergone by some aquatic organisms to survive periods of drought. anabolism The process in a plant or animal in which food is metabolized into complex compounds such as protein and living tissue anaerobe An organism that can thrive in the absence of free oxygen anaerobic Condition characterized by the absence of free oxygen. anaerobic digestion Sludge stabilization process where the organic material in biological sludges are converted to methane and carbon dioxide in an airtight reactor Anaerobic Selector Process Biological system for phosphorus and BOD removal by USFilter/Davco Analite Portable turbidimeters by Advanced Polymer Systems analyte The chemical for which a sample is analyzed ANC See"acid neutralizing capacity (ANc). An-CAt' Polymer processing control unit by Norchem Industries ancillary equipment Devices such as piping, flanges, valves, and pumps which are used in conjunction with treatment process or system. Anco Batch mixers by Enviropax, Inc. anemometer An instrument used to measure the force or velocity of wind. aneroid barometer An instrument used to measure atmospheric pressure which operates on the movement of a thin metal plate rather than the rise and fall of mercury. material can make with the, angle the inclined surface of a loosely divided angle of repose The maximun Angstrom(A)A unit of measure equivalent to one ten-thousandth of a micron anhydride A chemical compound derived by the elimination of water. anhydrite See"calcium sulfate hydrous A compound or substance that does not contain water. animal unit(AU) A unit for establishing grazing pressures from different kinds anion equivalent to the weight of 1 cow and 1 calf set at 4344e. e, where IAU is A negatively charged ion that migrates to the anode when an electrical potential is applied to a solution anion exchange An ion exchange process in which anions in solution are exchanged for other anions bound to an ion exchange resin or medium. anionic polymer A polyelectrolyte with a net negative electrical charge. Anitron Biological fluidized bed wastewater treatment system by USFilter/Kruger. ANMM Nanofiltration softening membrane by TriSep Corp annelid a wormlike organism, including earthworms and leeches, which have Annubar Mass flow monitoring system by Dieterich Standard anode The positive electrode where current leaves an electrolytic solution
anabatic wind A localized wind that flows up valley or mountainous slopes, usually in the afternoon, caused by the replacement of cool valley air with the warmer, heated air above it. anabiosis A temporary state of suspended animation undergone by some aquatic organisms to survive periods of drought. anabolism The process in a plant or animal in which food is metabolized into complex compounds such as protein and living tissue. anaerobe An organism that can thrive in the absence of free oxygen. anaerobic Condition characterized by the absence of free oxygen. anaerobic digestion Sludge stabilization process where the organic material in biological sludges are converted to methane and carbon dioxide in an airtight reactor. Anaerobic Selector Process Biological system for phosphorus and BOD removal by USFilter/Davco. Analite Portable turbidimeters by Advanced Polymer Systems. analyte The chemical for which a sample is analyzed. ANC See “acid neutralizing capacity (ANC).” An-CAT® Polymer processing control unit by Norchem Industries. ancillary equipment Devices such as piping, flanges, valves, and pumps which are used in conjunction with treatment process or system. Anco Batch mixers by Enviropax, Inc. anemometer An instrument used to measure the force or velocity of wind. aneroid barometer An instrument used to measure atmospheric pressure which operates on the movement of a thin metal plate rather than the rise and fall of mercury. angle of repose The maximum angle the inclined surface of a loosely divided material can make with the horizontal. Angstrom (Å) A unit of measure equivalent to one ten-thousandth of a micron. anhydride A chemical compound derived by the elimination of water. anhydrite See “calcium sulfate.” anhydrous A compound or substance that does not contain water. animal unit (AU) A unit for establishing grazing pressures from different kinds of grazing animals which consume similar kinds of forage, where 1AU is equivalent to the weight of 1 cow and 1 calf set at 454 kg. anion A negatively charged ion that migrates to the anode when an electrical potential is applied to a solution. anion exchange An ion exchange process in which anions in solution are exchanged for other anions bound to an ion exchange resin or medium. anionic polymer A polyelectrolyte with a net negative electrical charge. Anitron Biological fluidized bed wastewater treatment system by USFilter/Krüger. ANM™ Nanofiltration softening membrane by TriSep Corp. annelid A wormlike organism, including earthworms and leeches, which have long, segmented bodies. Annubar® Mass flow monitoring system by Dieterich Standard. anode The positive electrode where current leaves an electrolytic solution
anodic protection Electrochemical corrosion protection achieved through the use of an anode having a higher electrode potential than the metal to be protected anoxia A condition in which the blood oxygen level is less than normal anoxic Condition characterized by the absence of free oxygen ANOX-R Advanced treatment industrial wastewater treatment system by USFil- ter/davco ANPRM Advance Notice for Public Rulemaking. An EPA program for holding public forums for potential changes to the federal Water Quality Standard regulations ANSI American National standards Institute antagonism Interference or inhibition of the effect of one chemical by the action of another antarctic Characteristic of the region, climate, or vegetation south of the Antarctic Antarctic Circle An imaginary circle parallel to the equator at latitude 6634 Anthozoa A class of saltwater polyps including corals and sea anemones anthracite A hard, black coal containing a high percentage of fixed carbon, a low ercentage of volatile matter and burns with little or no smoke. anthracosis A lung disease more commonly known as"black lung disease. Anthrafille Filter anthracite by Unifilt Corp anthropodust Fugitive dust generated from human activities. anthropogenic climate change Human-induced global warming caused primarily by carbon dioxide, methane, and nitrous oxide emissions from engine exhausts s well as respiration of humans and animals. anthropogenic compounds Compounds created by human beings, often relatively resistant to biodegradation antichlors Reagents such as sulfur dioxide, sodium bisulfite, and sodium thiosul- fate which can be used to remove excess chlorine residuals from water by conversion to an inert salt anti-degradation clause See"prevention of significant deterioration(PSD) antifoam agent A surface active agent used to reduce or prevent foaming antifoulant An additive or dispersant that prevents fouling and/or the formation of scale antigen A substance capable of stimulating an immune response antiknock additive A compound, usually tetraethyl lead, added to gasoline to e engine pre-ignition and its'accompanying knocking or pinging. Pollution from the release of these compounds in auto emissions led to the introduction of nonleaded gasoline antioxidant A substance that slows down or prevents oxidation of another substance. antiscalant An additive that prevents the formation of inorganic scale Any Credible Evidence rule(ace rule) Another name for EPA Clean Air Act ""Credible evidence rule AOB Ammonia-oxidizing bacteria. AoC Seeassimilable organic carbon(AOC)
anodic protection Electrochemical corrosion protection achieved through the use of an anode having a higher electrode potential than the metal to be protected. anoxia A condition in which the blood oxygen level is less than normal. anoxic Condition characterized by the absence of free oxygen. ANOX-R Advanced treatment industrial wastewater treatment system by USFilter/Davco. ANPRM Advance Notice for Public Rulemaking. An EPA program for holding public forums for potential changes to the federal Water Quality Standard regulations. ANSI American National Standards Institute. antagonism Interference or inhibition of the effect of one chemical by the action of another. antarctic Characteristic of the region, climate, or vegetation south of the Antarctic Circle. Antarctic Circle An imaginary circle parallel to the equator at latitude 66°34′ south. Anthozoa A class of saltwater polyps including corals and sea anemones. anthracite A hard, black coal containing a high percentage of fixed carbon, a low percentage of volatile matter, and burns with little or no smoke. anthracosis A lung disease more commonly known as “black lung disease.” Anthrafilt® Filter anthracite by Unifilt Corp. anthropodust Fugitive dust generated from human activities. anthropogenic climate change Human-induced global warming caused primarily by carbon dioxide, methane, and nitrous oxide emissions from engine exhausts, as well as respiration of humans and animals. anthropogenic compounds Compounds created by human beings, often relatively resistant to biodegradation. antichlors Reagents such as sulfur dioxide, sodium bisulfite, and sodium thiosulfate which can be used to remove excess chlorine residuals from water by conversion to an inert salt. anti-degradation clause See “prevention of significant deterioration (PSD).” antifoam agent A surface active agent used to reduce or prevent foaming. antifoulant An additive or dispersant that prevents fouling and/or the formation of scale. antigen A substance capable of stimulating an immune response. antiknock additive A compound, usually tetraethyl lead, added to gasoline to minimize engine pre-ignition and its’ accompanying knocking or pinging. Pollution from the release of these compounds in auto emissions led to the introduction of nonleaded gasoline. antioxidant A substance that slows down or prevents oxidation of another substance. antiscalant An additive that prevents the formation of inorganic scale. Any Credible Evidence rule (ACE rule) Another name for EPA Clean Air Act “Credible Evidence rule.” AOB Ammonia-oxidizing bacteria. AOC See “assimilable organic carbon (AOC)
AOPs See"advanced oxidation processes(AOP) aot Advanced oxidation technologies AOX See“ adsorbable organic halides(AOX).” APCa Air Pollution Control association APER Air pollution emissions report. APF See“ assigned protective factor(APF)” APHA American Public health Association API American petroleum Institute API gravity An index inversely related to specific gravity used to identify liquid hydrocarbons free oil rises and is skimmed from the surface Y API separator Rectangular basin in which wastewater flows horizontally while APOVAC Anti-pollution vacuum system for solvent recovery by Rosenmund, Inc apparent color The color in water caused by the presence of suspended solids approach velocity The average water velocity of fluid in a channel upstream of a screen or other obstruction APR Seear purifying respirator(APR) APTI Air Pollution Training Institute APWA American Public Works association AQCCT Air-quality criteria and control techniques AQCP Air Quality Control Program AQCR Air Quality Control Region AQRV See"air quality related value(AQRv). AQTX Aquatic toxicity Aqua Bear Medium density foam pipeline cleaners by Girard Industries, Inc. Aqua Criss Cross Medium density coated foam pipeline cleaners by Girard Indus tries. Inc. Aqua Guard Self cleaning bar screen by Parkson Corp Aqua Pigs M Polyurethane foam pipeline cleaners by Girard Industries, Inc Aqua Swab Soft polyurethane pipeline cleaners by Girard Industries, Inc qua UVM Ultraviolet water disinfection systems by Trojan Technologies, Inc Aqua-4m Surface water treatment plant by Smith loveless, Inc AquaABFTM Traveling bridge type automatic backwash package filter by Aqua- Aerobic Systems, Inc. Aquabelr Gravity belt thickener by Ashbrook Corp (U.S. )Simon-Hartley, Ltd (U.K) Aqua Cale Open channel flow computer by JBS Instruments Aqua CAM-D Aerator/mixer/decanter for use in sequencing batch reactor by Aqua- Aerobic Systems, Inc. Aqua-Carb Activated carbon by USFilter/Westates Aqua-Car Sulfide conversion process to control odors by USFilter/Gas Technol Aqua-Cell Package water treatment plant by Wes Tech Engineering Inc AquaclaireM Wastewater treatment systems by DAs International, Inc Aquacode Membrane vessels by Spaulding Composites Co
AOPs See “advanced oxidation processes (AOP).” AOT Advanced oxidation technologies. AOX See “adsorbable organic halides (AOX).” APCA Air Pollution Control Association. APER Air pollution emissions report. APF See “assigned protective factor (APF).” APHA American Public Health Association. API American Petroleum Institute. API gravity An index inversely related to specific gravity used to identify liquid hydrocarbons. API separator Rectangular basin in which wastewater flows horizontally while free oil rises and is skimmed from the surface. APOVAC® Anti-pollution vacuum system for solvent recovery by Rosenmund, Inc. apparent color The color in water caused by the presence of suspended solids. approach velocity The average water velocity of fluid in a channel upstream of a screen or other obstruction. APR See “air purifying respirator (APR).” APTI Air Pollution Training Institute. APWA American Public Works Association. AQCCT Air-quality criteria and control techniques. AQCP Air Quality Control Program. AQCR Air Quality Control Region. AQRV See “air quality related value (AQRV).” AQTX Aquatic toxicity. Aqua Bear Medium density foam pipeline cleaners by Girard Industries, Inc. Aqua Criss Cross Medium density coated foam pipeline cleaners by Girard Industries, Inc. Aqua Guard® Self cleaning bar screen by Parkson Corp. Aqua Pigs™ Polyurethane foam pipeline cleaners by Girard Industries, Inc. Aqua Swab Soft polyurethane pipeline cleaners by Girard Industries, Inc. Aqua UV™ Ultraviolet water disinfection systems by Trojan Technologies, Inc. Aqua-4™ Surface water treatment plant by Smith & Loveless, Inc. AquaABF™ Traveling bridge type automatic backwash package filter by AquaAerobic Systems, Inc. Aquabelt® Gravity belt thickener by Ashbrook Corp. (U.S.) Simon-Hartley, Ltd. (U.K.). AquaCalc Open channel flow computer by JBS Instruments. AquaCAM-D Aerator/mixer/decanter for use in sequencing batch reactor by AquaAerobic Systems, Inc. Aqua-Carb Activated carbon by USFilter/Westates. Aqua-Cat® Sulfide conversion process to control odors by USFilter/Gas Technologies. Aqua-Cell™ Package water treatment plant by WesTech Engineering Inc. Aquaclaire™ Wastewater treatment systems by DAS International, Inc. Aquacode Membrane vessels by Spaulding Composites Co
aquaculture The managed production of fish or shellfish in a pond or lagoon AquaDDM Direct drive mixers by Aqua-Aerobics Systems, Inc AquaDecanr Floating decanter by Aqua Turbo Systems AquadeneTM Corrosion and scale control products by Stiles-Kem Division, Met Pro Corp AquaDiskTM Woven cloth tertiary filter by Aqua-Aerobic Systems, Inc quafeed Reverse osmosis antiscalants by B F Goodrich Co Aqua-FerIM Well water treatment plant designed for iron removal by Smith Loveless. Inc Aqua-FirM Dissolved ionic contaminant removal system by ATA Technologies Aquaflow Former name of product group acquired by USFilter/Industrial Waste water Systems Aqua-Jer Direct drive aerators by Aqua-Aerobics Systems, Inc. Aqua-Latoro High speed floating aerator by USFilter/Aerator Products Aqualifre Screw pump by Parkson Css,gier Chemicals Aquamag Magnesium hydroxide by Prer AquaMarM Desalination evaporator antiscalant by BetzDearborn, Inc. Aquamite Electrodialysis water treatment systems by Ionics, Inc AquaMJAM Manifold jet aerator by Aqua-Aerobic Systems, Inc Aquaporto Seawater desalination system by Ambient Technologies, Inc. Aquaray Ultraviolet disinfection system by Infilco Degremont, Inc Aquaritrol Coagulant control system using a programmable controller by USFil ter/Microfloc Aquarius Modular water treatment plant by USFilter/Microfloc AquaSBR Sequencing batch reactor by Aqua-Aerobics Systems, Inc Aquascan On-line VOC monitor by Sentex Systems, Inc Aqua-ScrubTM Powdered activated carbon adsorption system by USFilter/Westates AquaSEALTM Sequencing extended aeration lagoon system by Aqua-Aerobics Systems, Inc Aqua-Sensor Control system for water softener regeneration by Culligan Interna tional Corp Aquashade quatic plant growth control by Applied Biochemists, Inc Aqua-Shear Mixer by Flow Process Technologies, Inc Aquasorb Carbon adsorption treatment systems by Hadley Industries Aquasource Membrane system by Infilco Degremont, Inc Aquaspire Shaftless dewatering screw by Andritz-Ruthner, Inc Aquastore Storage tanks by A.O. Smith Engineered Storage Products Aquatair Packaged biological wastewater treatment plant by BCA Industrial Con- trols, ltd Aquatec Solid media contact filter vessels by Colloid Environmental Technolo- ies Co Aquatech Systems Former name of Aqualytics, Inc. aquatic humic substances(AHS) Humic substances in true solution that exhibit colloidal AquatreafM Sequencing batch reactor by EnviroSystems Supply
aquaculture The managed production of fish or shellfish in a pond or lagoon. AquaDDM® Direct drive mixers by Aqua-Aerobics Systems, Inc. AquaDecant® Floating decanter by AquaTurbo Systems. Aquadene™ Corrosion and scale control products by Stiles-Kem Division, Met Pro Corp. AquaDisk™ Woven cloth tertiary filter by Aqua-Aerobic Systems, Inc. Aquafeed® Reverse osmosis antiscalants by B.F. Goodrich Co. Aqua-Fer™ Well water treatment plant designed for iron removal by Smith & Loveless, Inc. Aqua-Fix™ Dissolved ionic contaminant removal system by ATA Technologies Corp. Aquaflow Former name of product group acquired by USFilter/Industrial Wastewater Systems. Aqua-Jet® Direct drive aerators by Aqua-Aerobics Systems, Inc. Aqua-Lator® High speed floating aerator by USFilter/Aerator Products. AquaLift® Screw pump by Parkson Corp. Aquamag® Magnesium hydroxide by Premier Chemicals. AquaMax™ Desalination evaporator antiscalant by BetzDearborn, Inc. Aquamite® Electrodialysis water treatment systems by Ionics, Inc. AquaMJA™ Manifold jet aerator by Aqua-Aerobic Systems, Inc. Aquaport® Seawater desalination system by Ambient Technologies, Inc. Aquaray® Ultraviolet disinfection system by Infilco Degremont, Inc. Aquaritrol® Coagulant control system using a programmable controller by USFilter/Microfloc. Aquarius® Modular water treatment plant by USFilter/Microfloc. AquaSBR® Sequencing batch reactor by Aqua-Aerobics Systems, Inc. Aquascan On-line VOC monitor by Sentex Systems, Inc. Aqua-Scrub™ Powdered activated carbon adsorption system by USFilter/Westates. AquaSEAL™ Sequencing extended aeration lagoon system by Aqua-Aerobics Systems, Inc. Aqua-Sensor Control system for water softener regeneration by Culligan International Corp. Aquashade® Aquatic plant growth control by Applied Biochemists, Inc. Aqua-Shear Mixer by Flow Process Technologies, Inc. Aquasorb® Carbon adsorption treatment systems by Hadley Industries. Aquasource® Membrane system by Infilco Degremont, Inc. Aquaspir® Shaftless dewatering screw by Andritz-Ruthner, Inc. Aquastore® Storage tanks by A.O. Smith Engineered Storage Products. Aquatair Packaged biological wastewater treatment plant by BCA Industrial Controls, Ltd. Aquatec® Solid media contact filter vessels by Colloid Environmental Technologies Co. Aquatech Systems Former name of Aqualytics, Inc. aquatic humic substances (AHS) Humic substances in true solution that exhibit colloidal properties. Aquatreat™ Sequencing batch reactor by EnviroSystems Supply