- Powdered activated carbon treatment
Powdered Activated Carbon Treatment (PACT) is a wastewater technology in which powdered
activated carbonis added to an anaerobic or aerobic treatment system. The carbon in the biological treatment process acts as a "buffer" against the effects of toxic organics in the wastewater.
In such a system, biological treatment and carbon
adsorbtionare combined into a single, synergistic treatment step. The result is a system which offers significant cost reduction compared to activated sludgeand granular carbon treatment options. The addition of the powdered activated carbon stabilizes biological systems against upsets and shock loading, controls color and odor, and may reduce disposal costs while removing soluble organics.
The system as it exists today was developed in the 1970s under a collaborative effort between DuPont and Zimpro. PACT systems can be used to treat industrial
wastewater, landfill leachateand highly contaminated surface water or groundwater.
aerobic treatment system, influent first enters an aerationtank where the powdered carbon is added, making up a portion of mixed liquor suspended solids. Once the aerationis completed, the treated wastewaterand the carbon- biomass slurryare allowed to settle.
Following treatment, a portion of the carbon and biomass slurry is wasted to solids handling. These solids can be wasted and disposed of as a slurry, dewatered to a compact, stable cake, or pumped as a slurry to a
wet air oxidationunit for further processing to regenerate the carbonand destroy the biological solids.
list of waste water treatment technologies
Wikimedia Foundation. 2010.
Look at other dictionaries:
Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions … Wikipedia
Carbon filtering — is a method of filtering that uses a piece of activated carbon to remove contaminants and impurities, utilizing chemical adsorption. Each piece of carbon is designed to provide a large section of surface area, in order to allow contaminants the… … Wikipedia
Pollution — For the Fransisco Battiato album, see Pollution (album). For the Goodies episode, see Pollution (The Goodies). Air pollution from World War II weapon production in Alabama, 1942 … Wikipedia
Electric double-layer capacitor — Maxwell Technologies MC and BC series supercapacitors (up to 3000 farad capacitance) An electric double layer capacitor (EDLC), also known as supercapacitor, supercondenser, electrochemical double layer capacitor, or ultracapacitor, is an… … Wikipedia
environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations … Universalium
Sucrose — Sucrose … Wikipedia
metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… … Universalium
Graphite — For other uses, see Graphite (disambiguation). Graphite Graphite specimen General Category Native element mineral … Wikipedia
soft drink — a beverage that is not alcoholic or intoxicating and is usually carbonated, as root beer or ginger ale. [1875 80] * * * Nonalcoholic beverage, usually carbonated, consisting of water (soda water), flavouring, and a sweet syrup or artificial… … Universalium
Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn … Wikipedia