US3676334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wastewater treatment sequence
Assignee: Envirotech Corp
•
Filing: 1969-05-14
•
Granted: 1972-07-11
•
Expires: 1989-05-14
Abstract
Abstract An improved process for treating wastewater is based on a pretreatment to convert high molecular weight soluble organic material in raw wastewater into organic material of low molecular weight. Following this conversion, the wastewater is treated with a process sequence tailored to effluent quality requirements. One such sequence may include, for example, the steps of physical or biological adsorption, solids removal, membrane filtration, and disinfection.
Inventors
- 👤 Mathew M Zuckerman
- 👤 Alan H Molof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; C02F3/00; C02F3/02; C02F3/04; C02F3/34; C02F3/342; C02F9/00; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/905
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
31 words
A process according to claim 1 wherein the soluble fraction includes inorganic soluble materials and wherein said process includes a step for removing at least part of said soluble inorganic materials.
Claim 2
Dependent Claim
23 words
A process according to claim 1 wherein step (d) comprises contacting said wastewater removed from said first treatment zone with a biological slime.
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein step (d) comprises passing said wastewater removed from said first treatment zone over a trickling filter.
Claim 4
Dependent Claim
91 words
A process according to claim 1 wherein step (d) comprises the steps of: d1. dividing said wastewater into first and second wastewater segments; d2. physically adsorbing at least part of said low molecular weight organic material in said first wastewater segment by passing at least a portion of said first wastewater segment over a physical adsorption material, and d3. biologically adsorbing at least part of said low molecular weight material in said second wastewater segment by passing at least a portion of said second wastewater segment over a biological adsorption surface.
Claim 5
Dependent Claim
27 words
A process according to claim 1 wherein step (b) comprises hydrolyzing said soluble organic high molecular weight material to soluble low molecular weight materials by chemical means.
Claim 6
Dependent Claim
53 words
A process for treating raw wastewater according to claim 1 wherein step (b) comprises: b1. adjusting the pH of said wastewater to induce hydrolysis of said high molecular weight materials, and b2. retaining said raw wastewater at a pre-selected temperature and pressure for a period of time sufficient to substantially complete said hydrolysis.
Claim 7
Dependent Claim
23 words
A process for treating raw wastewater according to claim 1 wherein step (b) comprises hydrolyzing said high molecular weight materials by enzymatic means.
Claim 8
Dependent Claim
51 words
A process for treating raw wastewater according to claim 8 wherein the step of hydrolyzing comprises: b1. adding to said raw wastewater and enzymatic material containing proteases and carbohydrases under conditions sufficient to cause substantially all of said soluble high molecular weight organic material to low molecular weight soluble organic materials.
Claim 9
Dependent Claim
24 words
A process for treating raw wastewater according to claim 1, further including the step of deactivating micro-organisms present in said wastewater by chemical means.
Claim 10
Dependent Claim
25 words
A process for treating raw wastewater according to claim 1 further including the step of deactivating micro-organisms present in said wastewater by applying energy thereto.
Claim 11
Dependent Claim
107 words
A process for treating raw wastewater containing a soluble fraction which includes soluble high molecular weight organic materials such as proteins and polysaccharides comprising: a. dividing said raw wastewater stream into a primary wastewater segment and a secondary wastewater segment; b. hydrolyzing said primary wastewater segment so that substantially all of the high molecular weight soluble organic material is substantially converted to soluble organic material of low molecular weight such as amino acids and mono and disaccharides; c. removing a selected portion of said soluble organic low molecular weight material from said primary wastewater segment, and d. combining the product of (c) with said secondary wastewater segment.
Claim 12
Dependent Claim
21 words
A process for treating raw wastewater according to claim 12, including the step of removing suspended solids from said raw wastewater.
Claim 13
Dependent Claim
113 words
A process for treating raw wastewater containing a soluble fraction which includes soluble high molecular weight materials such as proteins and polysaccharides and soluble inorganic materials comprising the Steps of: a. introducing said raw wastewater into a first treatment zone; b. subjecting said raw wastewater in said first treatment zone hydrolyzing conditions such that substantially all of said high molecular weight soluble organic materials as reduced in size to yield a wastewater containing a preponderance of soluble organic materials of low molecular weight such as amino acids and mono and disaccharides; c. subjecting said wastewater of (b) to a second treatment zone wherein at least part of the inorganic soluble material is removed.
Claim 14
Dependent Claim
27 words
A process for treating raw wastewater according to claim 14 wherein step (c) comprises passing said wastewater through a membrane for separating said soluble inorganic material therefrom.
Claim 15
Dependent Claim
22 words
A process for treating raw wastewater as defined in claim 14 further including the step of removing suspended solids from said wastewater.
Claim 16
Dependent Claim
75 words
A process for treating raw wastewater containing micro-organisms and soluble high molecular weight materials such as proteins and polysaccharides comprising the steps of: a. hydrolyzing said raw wastewater so that substantially all of said high molecular weight soluble organic materials in said raw wastewater are converted to organic materials of low molecular weight such as amino acids and mono and disaccharides, and b. deactivating at least a portion of said micro-organisms in said raw wastewater.
Claim 17
Dependent Claim
21 words
A process for treating raw wastewater according to claim 17 including the step of removing suspended solids from said raw wastewater.
Claim 18
Dependent Claim
27 words
A process for treating raw wastewater in accordance with claim 17 wherein step (b) comprises adding chemicals to said raw wastewater for deactivating said micro-organisms present therein.
Claim 19
Dependent Claim
26 words
A process for treating raw wastewater according to claim 17 wherein step (b) comprises applying energy to said raw wastewater to deactivate said micro-organisms present therein.
References Cited (Backward Citations)
US1928398A
Cited
US2044582A
Cited
US2137986A
Cited
US2171199A
Cited
US2196991A
Cited
US3242055A
Cited
US3347786A
Cited
US3408289A
Cited
US3377271A
Cited
US3398088A
Cited
US3487937A
Cited
US3455820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |