Everything about Powdered Activated Carbon Treatment totally explained
Powdered Activated Carbon Treatment (
PACT) is a wastewater technology in which powdered
activated carbon is 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
adsorbtion are combined into a single, synergistic treatment step. The result is a system which offers significant cost reduction compared to
activated sludge and 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.
Commercial Applications
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
leachate and highly contaminated surface water or groundwater.
In an
aerobic treatment system, influent first enters an
aeration tank where the powdered carbon is added, making up a portion of mixed liquor suspended solids. Once the
aeration is completed, the treated
wastewater and the carbon-
biomass slurry are 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 oxidation unit for further processing to regenerate the
carbon and destroy the biological solids.
Further Information
Get more info on 'Powdered Activated Carbon Treatment'.
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