Explaining the Activated Sludge Process

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T is to everyone s advan-tage for a community tobe able to treat itswastewater in the mosteconomical way. The activatedsludge Process has the advantage ofproducing a high quality effluent fora reasonable operating and mainte-nance costs. The Activated Sludge Process usesmicroorganisms to feed on organiccontaminants in wastewater, produc-ing a high-quality effluent. The basicprinciple behind all Activated sludgeprocesses is that as microorganismsgrow, they form particles that clumptogether. These particles (floc) areallowed to settle to the bottom of thetank, leaving a relatively clear liquidfree of organic material and suspend-ed simply, screened waste-water is mixed with varying amountsof recycled liquid containing a highproportion of organisms taken from asecondary cla

5 PIPELINE – Spring 2003; Vol.14, No.2 National Small Flows Clearinghouse (800) 624-8301 or (304) 293-4191 chamber, where it is mixed, and oxy-

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