Culture and phosphorus removal property of granular sludge for denitrifying phosphorus removal - Details

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Abstract：

The　granular　sludge　for　denitrifying　phosphorus　removal　is　successfully　formed　in　a　sequencing　batch　reactor　(SBR)　fed　with　synthetic　wastewater,　by　controlling　the　operational　modes　of　anaerobic/anoxic/aerobic,　anoxic　addition　of　the　nitrate,　and　selection　pressure.　The　granular　sludge　turns　into　a　shape　with　a　diameter　of　0.3　to　0.5　mm,　and　sludge　volume　index　(SVI)　and　mixed　liquid　suspended　solid　(MLSS)　are　maintained　at　45　mL/g　and　4000　mg/L,　respectively,　during　the　steady　operation.　The　granular　sludge　for　the　denitrifying　phosphorus　removal　also　shows　a　good　nutrient　removal　capability,　with　the　COD,　ammonia　nitrogen　and　phosphorus　removal　efficiencies　of　88%,　96%　and　90%,　respectively.　The　fate　of　phosphorus　and　the　X-ray　diffraction　test　results　suggest　the　existence　of　granular　sludge　phosphate　precipitation　phosphorus　removal　phenomena.　Granular　sludge　for　the　denitrifying　phosphorus　removal　in　the　experiment　uses　biological　phosphorus　removal,　and　it　also　has　phosphorus　removal　through　phosphate　precipitation　in　granular　sludge.

Keyword：

Activated sludge process Ammonia Batch reactors Granular materials Biological water treatment Nitrogen removal Anoxic water Denitrification

Author Community：

[ 1 ] [Li, Jun]College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
[ 2 ] [Zhang, Yu-Kun]College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
[ 3 ] [Wei, Su]College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
[ 4 ] [Wang, Ya-Yi]State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
[ 5 ] [Ma, Xiao]College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
[ 6 ] [Peng, Yong-Zhen]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China