acidity The capacity of an aqueous solution to neutralize a base acidophil (1)A cell or substance easily stained by acid dyes. (2)An organism that has an affinity for, and grows in, an acidic environment. Also spelled"acidophile ACL Alternate concentration limit ACM Asbestos-containing material ACM Thin film composite reverse osmosis membrane by TriSep Corp Acme Former screening equipment manufacturer. ACM-LPTM Low pressure thin film composite reverse osmosis membrane by iSep Corp ACMSTM Seawater reverse osmosis membrane by TriSep Corp ACoe U.S. Army Corps of Engineers Acousticair Low noise blowers by Tuthill Pneumatics Group ACP Air Carcinogen Policy he volume of water that would cover a one ea one foot deep Equivalent to approximately 1233. 6 cubic meters or 325,900 gallons acrolein An aldehyde compound used as a microbicide in the manufacture of Acro-Pac Packaged seawater reverse osmosis system by Aqua-Chem, Inc ACS-Plus High purity chemicals for laboratory use by Hach Co. ACT-100 Double wall fiberglass laminated steel underground tank by Steel Tank Institute ACTTM Combined aeration technologies by Aeration Industries, Inc Acticarbone Activated carbon by Elf Atochem North America, Inc Actifir Packing media for biological reactors by Sanitaire Corp. Actiflo High rate sedimentation process for water and wastewater treatment by USFilter/Kruger. ActifilocTM Modular, high-rate water treatment plant by USFilter/General Filter. recognized as a source of musty or earthy odors in drinking water ungi, and Actinomycetes A group of bacteria that share some features with activated alumina A partially dehydrated form of aluminum oxide frequently used as an adsorbent. Chemical formula is ALo Activated Biofilm Method Fixed film wastewater treatment system by JDV Equip- ment Corp activated biofilter A fixed film biological wastewater treatment process where a portion of the secondary sludge is returned to the reactor influent. activated carbon(AC) A highly adsorbent form of carbon used to remove dis- solved organic matter from water and wastewater or odors and toxic substances from gaseous emissions. activated charcoal See"activated carbon activated sludge The biologically active solids in an activated sludge process astewater treatment plant. activated sludge process A biological wastewater treatment process where a mix ture of wastewater and biologically enriched sludge is mixed and aerated to facilitate aerobic decomposition by microbes activation energy The energy required to initiate a process or reaction Activator Package wastewater treatment plant by Pollution Control, Incacidity The capacity of an aqueous solution to neutralize a base. acidophil (1) A cell or substance easily stained by acid dyes. (2) An organism that has an affinity for, and grows in, an acidic environment. Also spelled “acidophile.” ACL Alternate concentration limit. ACM Asbestos-containing material. ACM® Thin film composite reverse osmosis membrane by TriSep Corp. Acme Former screening equipment manufacturer. ACM-LP™ Low pressure thin film composite reverse osmosis membrane by TriSep Corp. ACMS™ Seawater reverse osmosis membrane by TriSep Corp. ACoE U.S. Army Corps of Engineers. Acousticair® Low noise blowers by Tuthill Pneumatics Group. ACP Air Carcinogen Policy. acre-foot The volume of water that would cover a one acre area one foot deep. Equivalent to approximately 1233.6 cubic meters or 325,900 gallons. acrolein An aldehyde compound used as a microbiocide in the manufacture of organic chemicals. Acro-Pac® Packaged seawater reverse osmosis system by Aqua-Chem, Inc. ACS-Plus High purity chemicals for laboratory use by Hach Co. ACT-100® Double wall fiberglass laminated steel underground tank by Steel Tank Institute. ACT™ Combined aeration technologies by Aeration Industries, Inc. Acticarbone® Activated carbon by Elf Atochem North America, Inc. Actifil® Packing media for biological reactors by Sanitaire Corp. Actiflo® High rate sedimentation process for water and wastewater treatment by USFilter/Krüger. Actifloc™ Modular, high-rate water treatment plant by USFilter/General Filter. Actinomycetes A group of bacteria that share some features with fungi, and recognized as a source of musty or earthy odors in drinking water. activated alumina A partially dehydrated form of aluminum oxide frequently used as an adsorbent. Chemical formula is Al2O3. Activated Biofilm Method Fixed film wastewater treatment system by JDV Equip￾ment Corp. activated biofilter A fixed film biological wastewater treatment process where a portion of the secondary sludge is returned to the reactor influent. activated carbon (AC) A highly adsorbent form of carbon used to remove dis￾solved organic matter from water and wastewater or odors and toxic substances from gaseous emissions. activated charcoal See “activated carbon.” activated sludge The biologically active solids in an activated sludge process wastewater treatment plant. activated sludge process A biological wastewater treatment process where a mix￾ture of wastewater and biologically enriched sludge is mixed and aerated to facilitate aerobic decomposition by microbes. activation energy The energy required to initiate a process or reaction. Activator Package wastewater treatment plant by Pollution Control, Inc