Process and apparatus for waste water treatment

Inactive Publication Date: 2005-07-07
BOYD STEVEN H +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0054] It is therefore an object of the present invention to provide a waste water treatment apparatus and process that takes advantage of the useful characteristics of biological treatment in an effective manner. It is also an object of the present invention to provide such an apparatus and process that maximizes the contact between contaminants from the waste water and the microbes. This allows inefficient systems to become efficient without the need for a relatively large processing tank or unit for smaller systems. Another object of the present invention is to provide a waste water treatment apparatus and process that is sufficiently effective so as to reduce to desirable levels the Total Suspended Solids (TSS), Biological Oxygen Demand(BOD), E-Coli, nitrogen-containing compounds, phosphorus-containing compounds, bacteria and viruses of waste water in a cost-effective manner.
[0055] These and other objectives are achieved in the present invention through an aerobic and anaerobic treatment process including the addition of specific microbes and carbon to specific locations in the aerobic and anaerobic process so that the aerobic and anaerobic processes are made efficient. The aerobic and anaerobic process may be homogeneous such as the absence of any fixed film or added suspended media, or in addition may contain fixed film or other added suspended media for a heterogeneous process, for extra locations (surface area) for the added microbes to attach and grow. In such systems, either microfiltration or ultrafiltration membranes may be used to contain the bacteria within the aerobic or anaerobic zone and remove the e

Problems solved by technology

These ingredients are frequently limiting in the efficient and proper functioning of the wastewater systems Frequently, the bacterial species which are specific for the pollutant to be removed is not always present, or have a short life or not present in high concentrations to be effective.
The volume available for fixed or suspended film surface area is

Method used

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  • Process and apparatus for waste water treatment
  • Process and apparatus for waste water treatment
  • Process and apparatus for waste water treatment

Examples

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example 1

Preparation of Nitrification and Denitrification Bacteria Mixture

[0112] Bacteria mixtures useful in nitrification and denitrification were prepared by mixing bacterial mixtures containing various bacterial strains known to nitrify and denitrify.

[0113] For nitrification, a mixture of Enterobacter Sakazaki(ATCC 29544), Bacillus coagulans (ATCC7050), Bacillus subtillis (ATCC 6051), Bacillus subtillis (ATCC 6051), Bacillus megatarium (ATCC7052), Bacillus licheniformis (ATCC14580), Bacillus cerus (ATCC4513) and Bacillus pasytereurii (ATCC 11859) was used. For nitrification, the bacteria were not easy to identify, and include Nitrobacter and Nitrocococcus spp obtained from Cape Cod Biochemicals, 21 Commerce Road, Bourne, Mass.

[0114] Bacterial growth media was prepared in 1 liter batches by dissolving 20 g Bacto Tryptose, 2 g Bacto Dextrose,(Difco Laboratories, Detroit, Mich.), 5 g sodium chloride, and 2.5 g disodium phosphate (Sigma-Aldrich Corp., St. Louis, Mo., U.S.A.) in 1 liter of ...

example 2

Preparation of Carbon Nutrient Mixtures

[0115] Carbon mixtures that are non-flammable, have low viscosity and are readily pumpable liquids, and stable to premature microbial growth were prepared by adding to 100 ml of deionized water, 50 g Maltrin M250 (Grain Processing Corporation, Muscatine, Iowa, U.S.A.), dissolving the solids, and adding 10 ml of methanol (Sigma-Aldrich). In addition to the carbon sources, other micronutrients generally used for growth of bacteria, and described in Handbook of Microbiological Media by R. N. Atlas, CRC Press, Cleveland, Ohio and Media Formulations described in the ATCC catalog , ATCC 12301 Park Lane Drive, Rockville, Ma., were added in the generally recommended quantities. The carbon and nutrient mixtures were found to be stable, as measured by unwanted premature growth for over 4 weeks.

[0116] The bacterial mixtures and carbon / nutrient mixtures were tested for viability using solutions made up of ammonium chloride for ammonia conversion, and sod...

example 3

[0119] The bacterial and carbon / nutrient mixtures were then tested in a field test in a system as described in FIG. 2 and FIG. 3, in a sewage treatment testing facility. The waste water exciting the settling tank had 36 ppm nitrate, and was flowing at a rate of 78 gallons / day, and the septic / settling tank was 1500 gallons. The bacteria mixture of nitrifiers and denitrifiers was fed at a rate of 11 ml / hr for 1 hour, each 6 hours, 4 times / day. The carbon / nutrient was added at a rate of 110 ml / hr, for 1 hr every 4 hours, for a total of 660 ml / day. Samples were taken after 14 days under the leaching field at a depth of 1 ft, and 2 ft and tested for nitrate nitrogen. The results are given in Table 1.

TABLE 1FIG. 2 Field Testing of Waste WaterNitratenitrogen, ppmBefore treatment1ft2ftunder the leaching field29-37ppm29-37ppmWith treatment as in FIG. 21ft2ftunder the leaching field10ppm2ppm

[0120] Ammonia was measured using a Hanna Instruments Inc, 584 Park East Drive, Woonsocket, R.I. 0289...

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Abstract

Systems for treating water containing unwanted contaminants. More particularly, the present invention relates to waste water treatment systems including biological media used to aerobically or anaerobically treat solid and liquid waste in water for large and small-scale waste water systems in a way that minimizes the size of the system required to output high-quality, environmentally suitable water that is depleted of ammonia, nitrites, nitrates and other contaminants.

Description

[0001] This application is a continuation of Ser. No. 10 / 897,081 filed Jul. 22, 2004, which is a continuation of Ser. No. 10 / 317,966 filed Dec. 12, 2002 (now U.S. Pat. No. 6,767,464 issued Jul. 27, 2004), which claims priority of provisional application Ser. No. 60 / 341,178 filed on Dec. 13, 2001, the disclosures of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to systems for treating water containing unwanted contaminants. More particularly, the present invention relates to waste water treatment systems including biological media used to aerobically and anaerobically treat solid and liquid waste in the water. Still more particularly, the present invention relates to such treatment systems for large and small-scale waste water systems. The present invention includes novel methods for effectively treating waste water in a way that minimizes the size of the system required to output high-qual...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F3/00C02F3/02C02F3/12C02F3/28C02F3/30C02F3/34
CPCC02F3/006Y02E50/343C02F3/286C02F3/302C02F3/306C02F3/348C02F2001/007C02F2103/005C02F2209/44C02F2305/06Y10S210/909Y10S210/908Y10S210/903Y10S210/904C02F3/02Y02W10/37Y02E50/30Y02W10/10
Inventor BOYD, STEVEN H.AZAD, ABDUL R.M.
Owner BOYD STEVEN H
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