Method of treating liquid waste
OwnerChristopher Peter Jones, Philip Chandlerinventors
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Abstract
A method of treating a liquid waste containing target species is described, in which the liquid is first conveyed through a housing containing a catalyst for removing either a reducing agent or an oxidising agent from the liquid, The liquid is then conveyed to a reverse osmosis or nanofiltration membrane to obtain a retentate rich in the target species and a permeate lean in the target species. The retentate is returned to the liquid upstream from the membrane, whilst the permeate may be subject to further treatment, for example in a neutralisation plant.
Claims21
A method of treating a liquid waste containing target species, comprising:
- exposing the liquid to a catalyst to remove either a reducing agent or an oxidising agent from the liquid, subsequently conveying the liquid to a reverse osmosis or nanofiltration membrane to obtain a retentate rich in the target species and a permeate lean in the target species, and returning the retentate to the liquid upstream from the membrane.
A method of treating a liquid waste containing target species, comprising:
- conveying the liquid to a reverse osmosis or nanofiltration membrane to obtain a retentate rich in target species and a permeate lean in target species, and characterised by, upstream from the membrane, exposing the liquid to a catalyst to remove an oxidising agent from the liquid to inhibit damage to the membrane.
A method of treating a liquid waste discharged from a tool and containing target species, comprising:
- conveying the liquid to a reverse osmosis or nanofiltration membrane to obtain a retentate rich in target species and a permeate lean in target species, and characterised by, upstream from the membrane, conveying the liquid through a housing mounted on or positioned adjacent to the tool and containing a catalyst for removing a reducing agent from the liquid.
Dependencies are inferred from the claim text.