Extraction of poly-phosphate from the activated sludge with thermal treatment for phosphorus recovery

Ming yang Zhang, Ai min Hao, Takahiro Kuba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Fast consumption of high quality phosphorus mines and uneven distribution in the world result in the shortage crisis for phosphorus, meanwhile lots of phosphate compounds which are discharged into nature water bodies by human beings have already induced many environmental problems. Because of this situation, phosphorus recovery from sewage sludge working in the aeration tank of wastewater treatment plant (WWTP) has been researched in the present study. Poly-phosphate (poly-P) and total phosphate (T-P) accumulated inside activated sludge could be released by thermal treatment at low temperature, 30% poly-P and 29% T-P could be released from sludge by heating at 70 °C. Different kinds of pretreatments had been tested to improve phosphorus release from activated sludge in thermal treatment; addition of chelating reagent at final concentration of 2 mM before thermal treatment could improve the phosphorus release obviously, 68% poly-P and 53% T-P could be released into liquid phase. Approximately 85% T-P could be precipitated with calcium at pH 11; it was interesting to find precipitation occurred in neutral condition without pH adjustment.

Original languageEnglish
Title of host publicationProgress in Environmental Science and Engineering
Pages2268-2274
Number of pages7
DOIs
Publication statusPublished - Jan 8 2013
Event2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012 - Jilin, China
Duration: Oct 12 2012Oct 14 2012

Publication series

NameAdvanced Materials Research
Volume610-613
ISSN (Print)1022-6680

Other

Other2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012
CountryChina
CityJilin
Period10/12/1210/14/12

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Extraction of poly-phosphate from the activated sludge with thermal treatment for phosphorus recovery'. Together they form a unique fingerprint.

Cite this