Experiment and Study on Effect of Sludge External Reflux Ratio on the Dosage of Micro Vortex Clarifier

DOI

10.2991/icache-15.2015.60How to use a DOI?

Keywords

micro vortex clarifier, external sludge reflux,reflux ratio, dosage

Abstract

In order to solve some problemsabout selectingblindly and randomly design and operational parameters ofmicro vortex clarifier .By studying the raw water from Kongmu-Lake, this experimentchooses PAC as thebest coagulant,and its best dosage is25 mg/L. Meanwhile the influence of micro vortex clarifierdosagein different sludge external reflux ratiois researched. Experiments are conducted in three kinds of refluxratios respectively 10%, 30% and 50%. Inlet flow is 10m3/h, the flocculation time is 6.8mins, adding the quantity of PAC gradually increased from 20 mg/L to 45 mg/L, when external reflux ratio is 30%, micro vortex clarifier has the best treatment effect. The lowest turbidity, total phosphorus, CODMnand ammonia nitrogenof the water are respectively 0.376NTU, 0.102mg/L, 2.44mg/L, 7.76mg/L. At this time, the best dosage is 30 mg/L, and the best reflux ratio is 30%. The test provides scientific data to support the application of micro vortex clarification technology.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Feng ping Hu
AU  - Bixia Huang
AU  - Dan Ji
PY  - 2015/11
DA  - 2015/11
TI  - Experiment and Study on Effect of Sludge External Reflux Ratio on the Dosage of Micro Vortex Clarifier
BT  - Proceedings of the 2015 International Conference on Architectural, Civil and Hydraulics Engineering
PB  - Atlantis Press
SP  - 311
EP  - 314
SN  - 2352-5401
UR  - https://doi.org/10.2991/icache-15.2015.60
DO  - 10.2991/icache-15.2015.60
ID  - Hu2015/11
ER  -