Title:
METHODS AND SYSTEMS FOR CONCENTRATING DIGESTATE FROM BIOMASS
Document Type and Number:
WIPO Patent Application WO/2018/094082
Kind Code:
A3
Abstract:
Embodiments disclosed herein are directed to methods and systems of concentrating effluent, removing nitrogen from an effluent, and producing fertilizer from an effluent. In an embodiment, the effluent is a digestate, such as from a biomass digester. In an embodiment, the digestate is concentrated and nitrogen is removed by performing forward osmosis using a draw solution and the digestate as a feed solution. The draw solution is subjected to reverse osmosis to produce an ammonium salt fertilizer. Phosphorus in the effluent may be precipitated as a struvite fertilizer.
Inventors:
HERRON JOHN (US)
BEAUDRY EDWARD GERARD (US)
BEAUDRY EDWARD GERARD (US)
Application Number:
PCT/US2017/062066
Publication Date:
June 06, 2019
Filing Date:
November 16, 2017
Export Citation:
Assignee:
FLUID TECH SOLUTIONS FTS INC (US)
International Classes:
B01D61/58; B01D61/02; C02F1/44; C02F11/02; C05F9/02; C05F9/04
Foreign References:
| US20120174639A1 | 2012-07-12 | |||
| US20150360983A1 | 2015-12-17 | |||
| US6464875B1 | 2002-10-15 | |||
| US20140151295A1 | 2014-06-05 | |||
| US20120315209A1 | 2012-12-13 |
Other References:
YANGYU, X ET AL.: "Nutrients recovery of source separated urine by forward osmosis and a pilot scale resources-oriented sanitation system", SWWS, SCHOOL OF ENVIRONMENT, vol. 7, no. 9, 15 September 2016 (2016-09-15), pages 13 - 14, XP055618627, Retrieved from the Internet [retrieved on 20171228]
XUE, W ET AL.: "Membrane fouling and long-term performance of seawater-driven forward osmosis for enrichment of nutrients in treated municipal wastewater", JOURNAL OF MEMBRANE SCIENCE, vol. 499, 1 February 2016 (2016-02-01), pages 555 - 562, XP029332160, doi:10.1016/j.memsci.2015.11.009
XUE, W ET AL.: "Membrane fouling and long-term performance of seawater-driven forward osmosis for enrichment of nutrients in treated municipal wastewater", JOURNAL OF MEMBRANE SCIENCE, vol. 499, 1 February 2016 (2016-02-01), pages 555 - 562, XP029332160, doi:10.1016/j.memsci.2015.11.009
Attorney, Agent or Firm:
SIMON, Marcus S. et al. (US)
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