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METHOD OF REUSING WASTEWATER TO GROW ALGAE AND METHOD OF USING EMULSION BREAKERS IN BIO-CRUDE PRODUCED FROM A HYDROTHERMAL LIQUEFACTION UNIT

IP.com Disclosure Number: IPCOM000242234D
Publication Date: 2015-Jun-26
Document File: 2 page(s) / 18K

Publishing Venue

The IP.com Prior Art Database

Related People

Baker Hughes Incorporated: OWNER [+2]

Abstract

A new method of using wastewater obtained from degassed sour water, boiler blowdown and/or cooling tower blowdown as a source of nitrogen and/or phosphorus to grow algae, and to a new method of using one or more emulsion breakers to separate the hydrocarbon rich phase from the aqueous phase of bio-crude obtained from a hydrothermal liquefaction (HTL) unit, are disclosed. In ordinary practice, these aqueous streams would be disposed of via primary and secondary wastewater treatment practices in refineries or other sources of the wastewater. The new method allows the nutrients to be utilized in the growth of algae without harmful impact on biocrude production and hydrothermal liquefaction (HTL) unit operation.

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method of reusing wastewater to grow algae and method of using emulsion breakers in bio-crude produced from a hydrothermal liquefAction unit

A new method of using wastewater obtained from degassed sour water, boiler blowdown and/or cooling tower blowdown as a source of nitrogen and/or phosphorus to grow algae, and to a new method of using one or more emulsion breakers to separate the hydrocarbon rich phase from the aqueous phase of bio-crude obtained from a hydrothermal liquefaction (HTL) unit, are disclosed. In ordinary practice, these aqueous streams would be disposed of via primary and secondary wastewater treatment practices in refineries or other sources of the wastewater. The new method allows the nutrients to be utilized in the growth of algae without harmful impact on biocrude production and hydrothermal liquefaction (HTL) unit operation.

In the one of the methods, the wastewater is first selected for the process based on its nitrogen and phosphorus nutrient concentration and purified or concentrated if necessary by operations like sour water stripping or anionic exchange and selective blending of waste streams to avoid harmful contaminants like hydrogen sulfide. The water so obtained is then fed to an algae growing area as a supplement to encourage algae growth. As part of this process, demulsifiers may be included to help separate biocrude from any aqueous stream coming from the HTL unit. The aqueous streams may contain some of the nutrients added to the algae grow...