Extraction
| Technology | |
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| Technology details | |
| Name: | Extraction |
| Category: | Pre-processing (Separation technologies), Post-processing (Separation technologies) |
| Feedstock: | Any freedstock with extractable substances from Food waste and Garden and park waste |
| Product: | Extractable substance |
Extraction is a separation process consisting of the separation of a substance from a matrix. Common examples include liquid-liquid extraction, and solid phase extraction. The term washing may also be used to refer to an extraction in which impurities are extracted from the solvent containing the desired compound.
Feedstock
Origin and composition
Extraction can be used to separate a valuable substance from the feed stream which can be Food waste and Garden and park waste.
Pre-treatment
Various pre-treatments may be utilised. Physical pre-treatments are mainly used to make the extractable substances acessable, e.g. by incresing the surface area of the feedstock (through Sizingand Steam explosion) and/or to release extractable substances e.g. via cell disruption (through Microwave treatment or Ultrasonication).
Process and technologies
Fluid-fluid extraction has various possible implementation forms on an industrial scale. Two main categories can be distinguished:
The first category consists of mixers-remixers (mixer-settlers), where the extraction process consists of two separate steps. In the first step, the two liquids are mixed to enable substance transfer. In the second step, the two liquids are separated. The two steps can take place in separate reactors.
The second category uses columns in which the two liquids are in continuous contact with each other. Here, typically special measures are taken to increase the contact surface between the feed and extraction flow (e.g. dispersion of one liquid, use of trays or packing material).
Liquid-liquid extraction is a process that separates substances based on their chemical properties. The principle consists of bringing the contaminated feed flow into contact with a second fluid, i.e. the extraction fluid. The extraction fluid is chosen in such a way that it does not mix with the supply flow and that it dissolves the pollutant well. During the extraction process, the contamination of the supply flow will (partially) transfer to the extraction fluid, until a balance in concentration has been reached. This balance depends on the affinity the pollutant has for the extraction fluid. If several substances are present, the balance will be substance-dependent. In an additional step, the pollutant is separated from the extraction fluid so it can be reused.
Products
Post-treatment
Various post-treatments may be utilised during or after the extraction process which includes:
- Centrifugation
- Crystallisation and precipitation
- Drying
- Field-Flow fractionation (FFF)
- Flocculation
- Ionic liquids
- Membrane filtration
- Microwave treatment
- Sieving
Technology providers
| Company name | Country | Technology category | Technology name | TRL | Capacity [kg/h] | Extractable substance | Feedstock: Food waste | Feedstock: Garden & park waste |
|---|---|---|---|---|---|---|---|---|
| Company 1 | [Country HQ location] | [Technology category (if different sub-categories are defined this has to be specified here, the available categories can be found on each technology page under the chapter Process and technologies)] | [Technology name (the "branded name" or the usual naming from company side)] | [4-9] | [numeric value] | ● | ● | |
| Company 2 | [Country HQ location] | [(if different sub-categories are defined this has to be specified here, the available categories can be found on each technology page under the chapter Process and technologies)] | [Technology name (the "branded name" or the usual naming from company side)] | [4-9] | [numeric value] | ● | ● |
Company 1
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| Technology and process details | |||
| Technology name: | Technology category: | Pre-processing (Separation technologies), Post-processing (Separation technologies) | |
| TRL: | Capacity: | kg·h-1 | |
| Extractable substance: | Other: | ||
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| Feedstock: | Product: | ||
Open access pilot and demo facility providers
Patents
Currently no patents have been identified.