ID
× COMMENTARYEDITOR'S PAGECOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Forward Osmosis Last month, Bioindustrial Innovation Canada (BIC; Sarnia, Ont.;…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment PDF Water Treatment

Facts at your Fingertips: Activated Sludge Process

By Scott Jenkins, Chemical Engineering magazine |

The activated sludge process (ASP) is designed to speed up the rate of decomposition of waste material in water. First developed in 1914, it remains an important means of treating both municipal and industrial wastewaters. This one-page reference provides information on the key process components and operating parameters of the ASP. Role of microbes and enzymes The ASP involves the creation and management of a human-engineered and managed ecosystem of desired microbial populations that convert biodegradable organic substances in the wastewater inlet stream into CO2 and new biomass. The term “activated sludge” refers to the particles produced in wastewater by the growth of organisms in aeration tanks. It differs from primary sludge in that the sludge particles contain many living organisms that feed on the incoming wastewater. Activated sludge consists of a mixed community of microorganisms, 95% of which are a variety of (mostly aerobic) species of bacteria. Activated sludge also contains significant populations of fungi, protozoa and higher forms of invertebrates. At the level of actual biodegradation reactions, two categories of enzymes are involved — namely extra- and intracellular enzymes. Extracellular enzymes are excreted…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
ABB Ability™ technology to transform BASF rotating equipment into intelligent machinery and improve uptime and reliability
Detect and correct anomalies early in your batch processes
ABB at ACHEMA 2018
The Future of Project Execution
Digitalization: What does it deliver today… and tomorrow?

View More

Live chat by BoldChat