Closed sulfur circulation system

Details Closed sulfur circulation system Closed sulfur circulation system

2006-03-22

2009-02-03

Prince, Fred (Department: 1797)

Liquid purification or separation

Processes

Treatment by living organism

C210S616000, C210S903000

Reexamination Certificate

active

07485229

ABSTRACT:
The present invention provides a closed sulfur circulation wastewater treatment system, which combines autotrophic and heterotrophic denitrification to recycle sulfates. Particularly, the present invention provides a process and a system for wastewater treatment which effectively process wastewater having both high nitrates and low organic carbonaceous sources, and effectively reduce sulfates by-products.

REFERENCES:
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patent: 6599423 (2003-07-01), Boles et al.
patent: 7025883 (2006-04-01), Olivier
patent: 2005068544 (2005-07-01), None
•Kim, I. S., Oh, S. B., Bum, M. S., Lee, S. L. and Lee, S. T. (2002). Monitoring the denitrification of wastewater containing high concentrations of nitrate with methanol in a sulfur-packed reactor. Applied Microbiology and Biotechnology, 59(1), 91-96.
•Koening, A. and Liu, L. H. (2002). Use of limestone for pH control in autotrophic denitrification: continuous flow experiments in pilot-scale bed reactors. Journal of Biotechnology, 99(2), pp. 161-171.
•Flere, J. M. and Zhang, T. C. (1999). Nitrate removal with sulfur-limestone autotrophic denitrification processes. Journal of environmental engineering, 125(8), pp. 721-729.
•Sison, N. F.; Hanaki, K. and Matsuo, T. (1996). Denitrification with external carbon source utilizing adsorption and desorption capability of activated carbon. Water Research, 30(1), pp. 217-227.

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