Formation of aerobic granules by Mg(2+) and Al (3+) augmentation in sequencing batch airlift reactor at low temperature.
Summary of "Formation of aerobic granules by Mg(2+) and Al (3+) augmentation in sequencing batch airlift reactor at low temperature."
Aerobic granules technology (AGS) was difficult to cultivate at low temperature, and the treatment efficiency of domestic sewage was remarkably low because of low temperature, which greatly limits its development and application. AGS formation time significantly decreased for 43Â days by adding 19.0Â mg/L Mg(2+) and 21.0Â mg/L Al(3+), moreover, AGS possessed better simultaneously chemical oxygen demand, NH(4) (+)-N, TP removal efficiencies at low temperature, which the respective removal efficiencies were 85.6, 88.8, and 91.9%. The content of total polysaccharides was 8.23Â mg/gMLSS as well as the content of total protein was 8.52Â mg/gMLSS, consequently, the total proteins/total polysaccharides ratio was 1.04, which the relatively high protein content induced by Mg(2+) and Al(3+) presented an essential feature for AGS formation. In addition, the affinity among Mg(2+), Al(3+) and -OH may drive the stretching vibration of -OH band which led to the infrared motion of functional groups in AGS and accelerate AGS formation as well.
Affiliation
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China, dreamy2064@hotmail.com.
Journal Details
This article was published in the following journal.
Name: Bioprocess and biosystems engineering
ISSN: 1615-7605
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22451077
- DOI: http://dx.doi.org/10.1007/s00449-012-0702-8
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