Power generation process using osmosis and anaerobic wastewater treatment

A waste water and anaerobic digestion technology, applied in osmosis/dialysis water/sewage treatment, energy waste water treatment, anaerobic digestion treatment, etc., can solve the problem of not getting the maximum available energy of salt water flow

Active Publication Date: 2018-12-21
APPL BIOMIMETIC AS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, known processes do not capture the potential maximum usable energy in saline streams and / or wastewater streams

Method used

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  • Power generation process using osmosis and anaerobic wastewater treatment
  • Power generation process using osmosis and anaerobic wastewater treatment
  • Power generation process using osmosis and anaerobic wastewater treatment

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Embodiment Construction

[0030] The method of the present invention increases the efficiency of generating electricity from wastewater streams. The method of the present invention uses wastewater as a lower salinity stream in an osmotic power generation process prior to decomposing organic matter present in the wastewater stream to produce biogas. This sequence of wastewater usage helps to increase the efficiency of the biogas process.

[0031] Industrial and / or domestic wastewater, such as sewage, provides a useful source of organic matter for biogas generation processes. However, the relatively small amount of organic matter present in most wastewaters means that the energy yield per unit volume of wastewater is relatively low compared to the liquid components.

[0032] In addition to the efficiency gains that can be expected by including additional power generating devices (osmotic power units and / or thermal power units) in the biogas process, the methods of the present invention complement each o...

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Abstract

A process for the generation of power is disclosed. The process comprises receiving a wastewater stream containing organic matter and passing the wastewater stream to an anaerobic digester in which the organic matter contained therein is broken down to produce biogas. The liquid content of said wastewater stream is reduced before said stream enters the anaerobic digester by passing the wastewaterstream through an osmotic power unit. The said stream is passed over one side of a semi-permeable membrane which permits the passage of water but not the passage of salts, an aqueous stream of highersalinity than said wastewater stream being passed over the other side of said membrane such that latent osmotic energy present in said aqueous stream of higher salinity is converted into electricity.

Description

technical field [0001] The present invention relates to methods for generating electricity. In particular, the invention relates to the generation of electricity using waste water and salt water streams. Background technique [0002] Many efforts are currently directed at new types of renewable energy sources that do not depend on fossil fuels. [0003] One area of ​​renewable energy research is that of biogas, in which combustible gases such as methane are produced by breaking down organic matter in the absence of oxygen. The combustible gas can thus be used as an energy source. Sources of organic matter may include wastewater from industrial and / or municipal sources, such as sewage. [0004] Another such area of ​​research is a process known as Pressure-Retarded Osmosis (PRO). In this process, a semipermeable membrane is used to separate a less concentrated solution from a more concentrated solution. The membrane osmotically allows solvent to flow from a less concentr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F3/28
CPCF03G7/005B01D61/002C02F1/445C02F3/28C02F2303/10Y02W10/30Y02E50/30B01D61/0021B01D61/0022F03G7/04C02F3/2893C02F11/04F03G7/009C02F2101/30B01D61/005F03G4/001F03G7/015
Inventor S·S·尼森
Owner APPL BIOMIMETIC AS
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