US4765901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for purifying waste water
Assignee: Paques BV
•
Filing: 1987-03-16
•
Granted: 1988-08-23
•
Expires: 2007-03-16
Abstract
Abstract A process for treating waste water containing both phenolic compounds being toxic for methanogenic organisms and degradable non-phenolic compounds prior to its anaerobic purification as well as a process for detoxifying waste water containing phenolic compounds being toxic for aquatic organisms by subjecting said waste water to an oxidative treatment in such a way that no or virtually no precipitation is formed of the polyphenol compounds produced and virtually no influence is executed on the biochemical oxygen demand and the chemical oxygen demand of the waste water.
Inventors
- 👤 James A. Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:05
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F3/28; C02F3/30; C02F3/34; C02F3/342; C02F1/00; C02F1/72; C02F1/722; C02F1/78; Y; Y02; Y02E; Y02E50/00; Y02E50/30; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909; Y10S210/928; Y10S435/00; Y10S435/801
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
41 words
In a process for treatment of waste water containing phenolic compounds and degradable non-phenolic compounds, comprising anaerobic purification which generated methane, the improvement comprising, prior to said anaerobic purification, oxidatively polymerizing said phenolic compounds to water-soluble polyphenols having reduced methanogenic toxicity.
Claim 2
Dependent Claim
41 words
In a process for treatment of waste water containing phenolic compounds and degradable non-phenolic compounds, comprising anaerobic purification which generated methane, the improvement comprising, prior to said anaerobic purification, oxidatively polymerizing said phenolic compounds to water-soluble polyphenols having reduced methanogenic toxicity.
Claim 3
Dependent Claim
26 words
Process according to claim 1, characterized in that the oxidative polymerization is an autoxidation reaction performed by means of oxygen under neutral to basic conditions (autoxidation).
Claim 4
Dependent Claim
20 words
Process according to claim 1, characterized in that the oxidative polymerization is performed by means of oxygen and phenoloxidase enzymes.
Claim 5
Dependent Claim
24 words
Process according to claim 3, wherein the source of said phenoloxidase enzymes is bacteria, mold or vegetable material which contains or secretes said enzymes.
Claim 6
Dependent Claim
24 words
Process according to claim 1, characterized in that the oxidative polymerization is performed by means of oxygen, ozone or hydrogen peroxide and laccase enzymes.
Claim 7
Dependent Claim
24 words
Process according to claim 5, wherein the source of said laccase enzymes is bacteria, mold or vegetable material which contains or secretes said enzymes.
Claim 8
Dependent Claim
26 words
Process according to claim 1, characterized in that the oxidative pollymerization is performed by means of ozone or hydrogen peroxide with or without an inorganic catlyst.
Claim 9
Dependent Claim
37 words
Method according to claim 1, characterized in that the detoxification brought about by means of the oxidative polymerization is measured on the basis of the tannic acid content which can be absorbed on polyamide, protein or polyvinylpyrrolidone.
Claim 10
Dependent Claim
33 words
Method according to claim 1, characterized in that waste water containing phenolic compounds whose phenol groups are completely or almost completely substituted is subjected to an anaerobic polymerization prior to the oxidative pretreatment.
Claim 11
Dependent Claim
65 words
Process for detoxifying waste water which contains phenolic compounds which are toxic to aquatic organisms, comprising subjecting the waste water to an oxidative polymerization of said phenolic compounds, with substantially no precipitate being formed of polyphenol compounds produced and substantially no influence being exerted on the biochemical oxygen demand and the chemical oxygen demand of the waste water and subsequently anaerobically purifying said waste water.
Claim 12
Dependent Claim
65 words
Process for detoxifying waste water which contains phenolic compounds which are toxic to aquatic organisms, comprising subjecting the waste water to an oxidative polymerization of said phenolic compounds, with substantially no precipitate being formed of polyphenol compounds produced and substantially no influence being exerted on the biochemical oxygen demand and the chemical oxygen demand of the waste water and subsequently anaerobically purifying said waste water.
Claim 13
Dependent Claim
25 words
Process according to claim 10, characterized in that the oxidative polymerization is an autoxidation reaction performed by means of oxygen under neutral to basic conditions.
Claim 14
Dependent Claim
20 words
Process according to claim 10, characterized in that the oxidative polymerization is perfrormed by means of oxygen and phenoloxidase enzymes.
Claim 15
Dependent Claim
23 words
Process to claim 12, wherein the source of said phenoloxidase enzymes is bacteria, mold or vegetable material which contains or secretes said enzymes.
Claim 16
Dependent Claim
37 words
Process according to claim 10, characterized in that the detoxification brought about by means of the oxidative polymerization is mesasured on the basis of the tannic acid content which can be absorbed on polyamide, protein or polyvinylpyrrolidone.
Claim 17
Dependent Claim
33 words
Process according to claim 10, characterized in that waste water containing phenolic compounds whose phenol groups are completely or almost completely substituted is subjected to an anaerobic pretreatment prior to the oxidative polymerization.
References Cited (Backward Citations)
US4022665A
Cited
US3977966A
Cited
US4340490A
Cited
US4169049A
Cited
US4213857A
Cited
GB2010798A
Cited
JPS54136747A
Cited
JPS5588896A
Cited
US4344848A
Cited
SU939407A1
Cited
SU914507A1
Cited
US4623465A
Cited
JPS5874191A
Cited
US4485016A
Cited
EP0134766A1
Cited
US4663043A
Cited
WO1985002690A1
Cited
US4592843A
Cited
US4666605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |