I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Depolymerization Last month, DuPont Teijin Films Ltd. (DTF; Contern, Luxembourg;…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment PDF Environment, Health, Safety & Security

Chementator: A process that requires less energy to treat sludge efficiently  

By Edited by Gerald Ondrey |

A new activated-sludge-treatment process that promises to slash energy consumption is being developed by Sanki Engineering Co., Ltd., (Tokyo, www.sanki.co.jp), in cooperation with Ebara Corp., (Tokyo) and Touhoku University (Sendai, all Japan), and the support of NEDO (New Energy & Industrial Technology Organization; Kawasaki). The process features an innovative downflow tower equipped with hanging "sponges" (DHS, downflow hanging sponge) downstream of a conventional upflow, anaerobic-sludge blanket (UASB) process. Although conventional UASB technology reduces the volume of sludge while recovering energy in the form of biogas, the discharged water from a stand-alone UASB may not meet the local regulations regarding biological oxygen demand (BOD). Therefore, an aerobic-treatment step — with an energy-consuming blower — is often added downstream of the UASB. The new process is able to meet emission regulations without requiring a blower, thereby reducing energy consumption by up to 70%, says Sanki Engineering. In the DHS, specially designed sponges of polyurethane are efficiently packed in a plastic, cylindrical downflow tower, which operates with ambient air (no blower). These sponges hold water and microbes…
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
Reduce the Risk of Corrosion in Fertilizer Production
3 Reasons to Automate Sensor Cleaning
Protect Your Turbines from Silica with a Low Maintenance Analyzer
Your Off-line pH Measurements Might Be Misleading and Costing You a Lot of Money
Reduce Explosion Risk in 2 Seconds with In Situ Oxygen Analysis

View More

Live chat by BoldChat