I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment PDF Business & Economics

Wastewater Treatment: Energy-Conservation Opportunities

By Abtin Ataei, Graduate School of the Environment and Energy, Science and Research Branch of I.A.U. |

Typical wastewater-treatment plants (WWTP) — both industrial and municipal — consume large amounts of energy, which can represent 50% or more of the facility’s variable operating and maintenance costs. Most employ biological processes that rely on energy-intensive aeration systems whose energy consumption is approximately 0.5 kWh per m3 of effluent treated. This article discusses a variety of design and operating improvements that can be undertaken to reduce energy consumption (and related costs) during wastewater treatment. Case study results from representative WWTP scenarios are presented throughout the discussion. The specific energy-conservation options presented here are organized into five specific proposals, each of which is discussed in detail below: • Optimize aeration and oxygen transfer • Use variable frequency drives (VFDs) to adjust the speed of electric motors to meet process demand • Replace old electric motors with more-energy-efficient ones • Maximize the production and use of biogas as a fuel • Design an efficient, distributed effluent cooling system Typical system components The biological treatment of wastewater is carried out by microorganisms, mainly bacteria, which…
Related Content
WEFTEC Show Preview
Presented by The Water Environment Federation (Alexandria, Va.; www.wef.org), the Weftec 2016 conference and exhibition will take place Sept. 24–28…

ABB

The Big 6 level measurement technologies: Where to use them and why

WHITE PAPER — The Big 6 level measurement technologies: Where to use them and why Anyone who’s ever worn a tool belt knows that sometimes you have to use a tool for something it’s not designed to do. If you don’t happen to have a hammer, a heavy…

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
Securing the availability of chemical processes through a long-term partnership
Metering gas in biogas plants
The Big 6 level measurement technologies: Where to use them and why
Minimizing particle breakage and mother liquor residue in technical salts production
Expectations are shifting: How measurement solutions can help overcome chemical industry challenges

View More