USRE37181E1 - Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems - Google Patents
Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems Download PDFInfo
- Publication number
- USRE37181E1 USRE37181E1 US09/198,506 US19850698A USRE37181E US RE37181 E1 USRE37181 E1 US RE37181E1 US 19850698 A US19850698 A US 19850698A US RE37181 E USRE37181 E US RE37181E
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- US
- United States
- Prior art keywords
- process according
- hours
- nitrate
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- practice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/025—Biological purification using sources of oxygen other than air, oxygen or ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/08—Treatment of wastewater in the sewer, e.g. to reduce grease, odour
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/916—Odor, e.g. including control or abatement
Definitions
- Appl. Ser. No. 08 / 437 , 874 filed May 9 , 1995 and Appl. Ser. No. 09 / 198 , 506 , filed Nov. 24 , 1998 , and are each reissues of U.S. Pat. No. 4 , 911 , 843 (which issued from Appl. Ser. No. 07 / 281 , 747 , filed Dec. 9 , 1988 ) Appl. Ser. No. 09 / 198 , 506 is a Continuation of Appl. Ser. No. 08 / 437 , 874 , now U.S. Pat. No. Re. 36 , 651 .
- This invention relates to a process for the removal or reduction of dissolved hydrogen sulfide, and reduction of BOD in sewer systems, municipal waste treatment plants and in other industrial waste applications.
- nitrate provides an oxygen source which promotes the growth of naturally occurring bacteria which utilize in their metabolism the sulfur tied up as hydrogen sulfide. It has been demonstrated both in lab jar tests and in an actual sewage collection system test, that dosing sewage containing over 50 mg/L of dissolved hydrogen sulfide with a sodium nitrate solution reduces the dissolved hydrogen sulfide to less than 0.1 mg/L. Along with this phenomena a significant reduction in sewage biological oxygen demand, BOD, of up to about 70%, and overall “sweetening”, i.e., removal of other minor odors, of the sewage has been observed. These phenomena are believed to be the results of the biological process promoted by the nitrate addition.
- nitrate oxygen NO 3 —O
- S 2 ⁇ 1 part dissolved sulfide
- an “incubation” period of about 8 to about 96 hours, and preferably about 24 to about 48 hours, is necessary to culture the bacteria, followed by about 1.5 to about 20 hours, and preferably about 3 to about 12 hours, for ongoing sulfide removal.
- the FIGURE is a schematic diagram representing a sewage system employed in the Example described herein.
- nitrate ions NO 3 provides an oxygen source for certain bacteria already present in the waste or sewage to thrive.
- the bacteria that grow as a result of the nitrate oxygen utilize the dissolved hydrogen sulfide as part of their metabolism.
- the dissolved hydrogen sulfide contains sulfur which the bacteria also require in their metabolism.
- the source of nitrate to accomplish the sulfide removal is not critical, and both aqueous solutions of sodium nitrate and calcium nitrate have been used successfully.
- This reaction is biochemical and it will not occur within a sterile solution, i.e., naturally occurring bacteria in sewage must be present. Additionally, the sulfide removal is not instantaneous; tests have shown that an “incubation” period of 24-48 hours is necessary to culture the bacteria and thereafter 3-12 hours for ongoing sulfide removal. It is believed, however, that the incubation period may extend from about 8 to about 96 hours, and the ongoing removal period from about 1.5 to about 20 hours, depending on conditions.
- the promotion of biological activity via nitrate addition as described also achieves a reduction in sewage BOD due to the utilization of organic matter in the metabolism described.
- sodium nitrate was added to a sewer system in Jacksonville, Florida at a master pump station, or feed point B, upstream of a second master pump station comprising a monitoring point A.
- the feed point B was at a point removed from an intersection C of the feed line and main sewage line, as indicated in the FIGURE.
- Average detention times (based on average daily flows, line sizes and lengths are as follows:
- the B ⁇ C distance and retention time of 7 hours constitutes the incubation period, coupled with the distance C ⁇ A and associated retention time of 3.3 hours comprises a total of 10.3 hours from addition of the nitrate station at point B to the monitoring at point A, thereby permitting sufficient time for the bacteria to culture.
- the average daily H 2 S at point B was 25-30 ppm.
- Subjective sampling also indicated a significant reduction in sewage odors other than hydrogen sulfide.
- the present invention provides for the removal of significant amounts of existing dissolved hydrogen sulfide and a corresponding reduction in sewage BOD.
- sodium nitrate By properly feeding sodium nitrate into the sewage or waste, odor and corrosion problems can also be substantially eliminated.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Removal Of Specific Substances (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
TABLE I | ||
SODIUM NITRATE | DAILY AVERAGE | |
SOLUTION | DISSOLVED H2S | |
DATE | FEED · GPD | PPM AT POINT A |
2/22/88 | 0 | 35-40 |
2/23/88 | 0 | 30-50 |
2/24/88 | 1800 | 30 |
2/25/88 | 1800 | 15-20 |
2/26/88 | 1800 | 0.1-15 |
2/27/88 | 1200 | 0.1- |
2/28/88 | 1200 | 0.3- |
2/29/88 | 1200 | 0.1-8 |
3/01/88 | 650 | 0.7-1.5 |
3/02/88 | 650 | 1.0-1.5 |
TABLE II |
BOD (mg/L) |
DATE | POINT B | POINT A | POINT D | ||
03/02/88 | 165 | 112 | 138 | ||
03/03/88 | 145 | 55 | 135 | ||
Claims (28)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/198,506 USRE37181E1 (en) | 1988-12-09 | 1998-11-24 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/281,747 US4911843A (en) | 1988-12-09 | 1988-12-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
US08/437,874 USRE36651E (en) | 1988-12-09 | 1995-05-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
US09/198,506 USRE37181E1 (en) | 1988-12-09 | 1998-11-24 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/281,747 Reissue US4911843A (en) | 1988-12-09 | 1988-12-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE37181E1 true USRE37181E1 (en) | 2001-05-22 |
Family
ID=23078631
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/281,747 Ceased US4911843A (en) | 1988-12-09 | 1988-12-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
US08/437,874 Expired - Lifetime USRE36651E (en) | 1988-12-09 | 1995-05-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
US09/198,506 Expired - Lifetime USRE37181E1 (en) | 1988-12-09 | 1998-11-24 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/281,747 Ceased US4911843A (en) | 1988-12-09 | 1988-12-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
US08/437,874 Expired - Lifetime USRE36651E (en) | 1988-12-09 | 1995-05-09 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
Country Status (1)
Country | Link |
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US (3) | US4911843A (en) |
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US20050224409A1 (en) * | 2003-03-05 | 2005-10-13 | Usfilter Corporation | Method and apparatus for controlling sulfide generation |
US20060006121A1 (en) * | 2004-07-08 | 2006-01-12 | Simpson Gregory D | Synergistic composition and method for odor control |
US20060006120A1 (en) * | 2004-07-08 | 2006-01-12 | Zhuo Chen | Method of preventing hydrogen sulfide odor generation in an aqueous medium |
US20060073112A1 (en) * | 2004-10-01 | 2006-04-06 | Whitekettle Wilson K | Method of preventing hydrogen sulfide odor generation in an aqueous medium |
US20070131625A1 (en) * | 2005-12-12 | 2007-06-14 | General Electric Company | Methods of inhibiting biogenic sulfide formation in aqueous systems |
US20070196319A1 (en) * | 2003-06-05 | 2007-08-23 | Janice Alfrey | Methods of producing, marketing and using odor control compositions |
US20080041785A1 (en) * | 2003-12-02 | 2008-02-21 | Siemens Water Technologies Corp. | Systems and methods for wastewater odor control |
US20090068059A1 (en) * | 2007-09-12 | 2009-03-12 | Whitekettle Wilson K | Method of preventing hydrogen sulfide odor generation in an aqueous medium |
US20090188859A1 (en) * | 2008-01-30 | 2009-07-30 | Matheis Timothy F | Wastewater treament systems and methods |
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US5405531A (en) * | 1993-02-16 | 1995-04-11 | Geo-Microbial Technologies, Inc. | Method for reducing the amount of and preventing the formation of hydrogen sulfide in an aqueous system |
US5481815A (en) * | 1993-06-30 | 1996-01-09 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of The Environment | System to reduce sediment toxicity |
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-
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-
1998
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