EP0202387A2
Expired / Lapsed
EP
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Integrated biological adsorption process for treating wastewater
Assignee: Occidental Chemical Corp
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Filing: 1986-01-08
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Granted: —
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Expires: 2006-01-08
Abstract
Abstract This invention relates to the treatment of chemical process wastewaters and chemical waste landfill leachates containing obnoxious and hazardous halogenated organic chemicals by the use of a combination of physical, chemical and biological processes to produce a liquid discharge acceptable to the environment in an efficient and economical manner.
Inventors
- 👤 Wei-Chi Ying
- 👤 Stanley A. Sojka
- 👤 Vernon J. Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:33
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1263; C02F3/1205; C02F3/1231; C02F9/00; C02F1/00; C02F1/28; C02F1/283; C02F1/58; C02F1/62; C02F1/64; C02F1/66; C02F1/72; C02F2101/00; C02F2101/30; C02F2101/32; C02F2101/322; C02F2101/36; C02F2101/363; C02F2103/00; C02F2103/06; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
33 words
The method for treating process wastewaters and waste landfill leachates to remove the objectionable contaminants to produce a liquid discharge capable of being assimulated in the natural environment without adverse effects, which comprises:
Claim 2
Independent Claim
33 words
The method for treating process wastewaters and waste landfill leachates to remove the objectionable contaminants to produce a liquid discharge capable of being assimulated in the natural environment without adverse effects, which comprises:
Claim 3
Dependent Claim
26 words
introducing the wastewater to be treated into an equalization zone to produce a substantially uniform liquid phase composition and to allow for sedimentation of undissolved solids;
Claim 4
Dependent Claim
26 words
introducing the wastewater to be treated into an equalization zone to produce a substantially uniform liquid phase composition and to allow for sedimentation of undissolved solids;
Claim 5
Dependent Claim
39 words
transferring the equalized wastewater to a pretreatment zone, subjecting the said liquid to neutralization and oxidation to cause precipitation of metal hydroxides which adsorbs a portion of organic pollutants, and separating the precipitates so formed from the treated liquid;
Claim 6
Dependent Claim
39 words
transferring the equalized wastewater to a pretreatment zone, subjecting the said liquid to neutralization and oxidation to cause precipitation of metal hydroxides which adsorbs a portion of organic pollutants, and separating the precipitates so formed from the treated liquid;
Claim 7
Dependent Claim
23 words
transferring the pretreated wastewater, produced in Step 2, to a biological treatment zone to remove substantially all biodegrable organic constituents of the wastewater;
Claim 8
Dependent Claim
23 words
transferring the pretreated wastewater, produced in Step 2, to a biological treatment zone to remove substantially all biodegrable organic constituents of the wastewater;
Claim 9
Dependent Claim
26 words
transferring the bio-treated wastewater to a adsorption treatment zone to remove the balance of organic pollutants and to produce a discharge acceptable to the natural environment.
Claim 10
Dependent Claim
26 words
transferring the bio-treated wastewater to a adsorption treatment zone to remove the balance of organic pollutants and to produce a discharge acceptable to the natural environment.
Claim 11
Dependent Claim
17 words
The method of Claim 1 wherein the wastewater to be treated is process wastewater containing halogenated compounds.
Claim 12
Dependent Claim
23 words
The method of Claim 1 wherein the wastewater to be treated is a leachate from a chemical waste landfill containing halogenated organic compounds.
Claim 13
Dependent Claim
51 words
The method of Claim 3 wherein the leachate containing halogenated organic compounds is neutralized to a pH within a range of 6.5 to 8.5 and wherein aeration is employed as a means of oxidation, resulting in precipitates which adsorb halogenated organic compounds and enhance separation via sedimentation of the suspended solids.
Claim 14
Dependent Claim
27 words
The method of Claim 4 wherein the pretreated wastewater transferred is subjected to acclimated activated sludge in the biological treatment zone to decompose the biodegradable organic compounds.
Claim 15
Dependent Claim
29 words
The method of Claim 5 wherein the bio-treated wastewater transferred is subjected to carbon adsorption in the absorption zone to produce a discharge substantially free of halogenated organic compounds.
Claim 16
Dependent Claim
13 words
The method of Claim 1 wherein the neutralization and oxidation carried out simultaneously.
Claim 17
Dependent Claim
17 words
The method of Claim 7 wherein the biological treatment is carried out in a sequencing batch reactor.
Claim 18
Dependent Claim
18 words
The method of Claim 1 wherein the adsorption treatment is carried out in a granular activated carbon adsorber.
Claim 19
Dependent Claim
21 words
The method of Claim 9 wherein the granular activated carbon in the carbon adsorption zone is virgin or regenerated activated carbon.
Claim 20
Dependent Claim
33 words
The method of Claim 10 wherein the exhausted granular activated carbon is replaced by virgin or regenerated activated carbon to allow for the uninterrupted production of a discharge acceptable to the natural environment.
References Cited (Backward Citations)
No citation records indexed.
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