KR830007442A - Wastewater Treatment Method and Apparatus - Google Patents

Abstract

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Description

Wastewater Treatment Method and Apparatus

Since this is an open matter, no full text was included.

6 is a schematic view of using the present invention in a wastewater treatment apparatus.

7 is a cross-sectional view of the present invention used to treat a bypassed fluid.

8 is a cross-sectional view of the present invention showing a cleaning wall and a pulsed bed apparatus.

Claims (28)

A method of removing suspended and colloidal substances, which may contain grease and oil, from untreated wastewater containing domestic sewage, comprising: a. Introducing the wastewater containing domestic sewage into a clarifier or sorting device to purify and remove some of the material without adding chemicals, b. Introduce purified wastewater through the media in the filter tank into the dark cavity to produce a filtrate containing no more than 40% of the suspended solids present in the untreated wastewater without adding chemicals, c. Intermittently introducing air upwards through the particle medium to reduce flow resistance through the medium and prevent anaerobic biological action without inhibiting the filtration media properties, d. And backwashing the filter intermittently with a portion of the filtrate, a surfactant and an oxidant to remove accumulated harmful substances. In removing suspended and colloidal substances that may contain grease and oil from wastewater containing domestic sewage and not pretreated: a. Wastewater containing domestic sewage is introduced into a clarifier or sorting device to remove some of the material without adding chemicals and to purify the wastewater. B. First particles to produce a primary filtrate without adding chemicals. Introducing purified water through the media filter into the first filter tank, and c. The primary filtrate was introduced into a second filter tank through a second particle media filter without the addition of chemicals to produce a second filtrate containing less than 25% of the suspended solids present in the untreated wastewater. d. Intermittently passing air upward through the particle media of each filter to reduce flow resistance through the media and prevent anaerobic biological action without degrading the filter media properties, e. Intermittently backwashing the first filter with a portion of the primary filtrate, a surfactant and an oxidant to remove harmful substances, and f. Wastewater treatment method characterized in that the second filter is intermittently backwashed with a portion of the secondary filtrate, surfactant and oxidant to remove harmful substances. The wastewater treatment method according to claim 2, wherein the medium effective particle size of the second filter is smaller than the effective medium particle of the first filter. The method of claim 2 or 3, wherein the secondary filtrate contains 30 mg / l of suspended solids or 30 mg / l of B ₀ D ₅ . The wastewater treatment method according to any one of claims 2 to 4, wherein the medium in the second filter is activated carbon. To remove suspended and colloidal substances that may contain grease and oil from wastewater containing domestic sewage and not pretreated: a. Introducing wastewater containing domestic sewage into the clarifier or sorting device to remove some of the substance without adding chemicals and to purify the wastewater; b. Introducing the purified wastewater through the first particle media filter in the first filter tank into the first female cavity without adding chemicals, and c. A coagulant is rapidly mixed with the primary filtrate and then introduced into the second dark cavity through the second particle media filter in the second filter without a coagulation step to contain less than 10% of the suspended solids present in the untreated wastewater. A secondary filtrate, d. Intermittently introducing air upwardly through the particle media of each filter to reduce flow resistance through the media and inhibit anaerobic biological activity without inhibiting filter media properties, e. Intermittently backwashing the first filter with a portion of the primary filtrate, a surfactant and an oxidant to remove accumulated harmful substances, f. Wastewater treatment method characterized in that the second filter is intermittently backwashed with a portion of the secondary filtrate, surfactant and oxidant to remove accumulated yuhamil. 7. The method of claim 6, wherein the secondary filtrate contains 20 mg / l or less of suspended solids and 20 mg / l of B ₀ D ₅ . In the removal of suspended and colloidal substances which may contain grease and oil and reduced form of nitrogen from wastewater containing domestic sewage and not pretreated, a. Introducing the wastewater containing domestic sewage into a clarifier or sorting device to remove a portion of the substance and purify the wastewater without adding chemicals, b. Introducing a purified wastewater into the first female cavity without adding chemicals through the first particle media filter in the first filter tank to produce a primary filtrate, c. Introducing the primary filtrate through a fixed medium filter for nitrating the microorganisms growing on the fixed medium to oxidize nitrogen in the primary filtrate to nitrates and nitrites, d. A secondary filtrate containing less than 20 mg / l of suspended solids and 20 mg / l of B ₀ D ₅ by introducing a nitrified primary filtrate through a second particle media filter in a second filter tank into the second female cavity. Generate e. Intermittently passing air upward through each particle medium to reduce flow resistance through the medium and to inhibit anaerobic biological action, f. Waste water treatment method characterized in that the first filter is intermittently backwashed with a portion of the primary filtrate, a surfactant and an oxidant to remove the accumulated harmful substances. The wastewater treatment method of claim 8, wherein the primary filtrate passes through the fixed medium filter at a surface load rate of greater than or equal to 0.34 GPM per ft ² . 10. The method of claim 8 or 9, wherein the primary filtrate passes through the fixed medium filter without recycling. The wastewater treatment method according to any one of claims 8-10, wherein the temperature of the untreated wastewater is at least 68 ° F and the secondary filtrate contains NH ₄ -N of 1.5 mg / l or less. The wastewater treatment method according to any one of the claims, wherein the filtrate is discharged to a natural water channel without biological treatment other than sterilization. The purifier or screen according to any of the claims, wherein the harmful substances removed from the filter or filters, including carbon particles produced from the wear of the filter medium, are concentrated by gravity turbidity and produce fuel gas. A method for treating wastewater, characterized in that it is anaerobicly immersed with suspended solids removed by the apparatus. The wastewater treatment method according to claim 13, wherein a coagulant is added to remove harmful substances before gravity turbidity. The wastewater treatment method according to any of the preceding claims, wherein the oxidant consists of hydrogen peroxide, ozone and coral-containing gas or halogenated compound. The wastewater treatment method according to any one of the claims, wherein air passing upward through the particle medium is activated by the filtrate rising in the dark cavity while removing the air upward. The method of any one of the preceding claims, wherein the filtrate of step (b ') reducing the potential to produce new cellular material is introduced into an anaerobic biological treatment step in which a biological solid is in contact with the filtrate. 18. The method of claim 17 wherein the aerobic biological treatment step introduces the triwater filter effluent through the triwater filter without recycling the effluent. In any one of the claims, the surfactant is added to the portion of the filtrate where the filter is backwashed, and the oxidant is introduced to the filtrate before, during or after the filtrate. Wastewater treatment method characterized in that the injection into the fluid. The method according to any one of the preceding claims, wherein the backwashing simultaneously sprays the filtrate and the acidic agent on the wall surface of the filter tank to clean and sterilize the wall. 20. The wastewater treatment method according to any one of claims 1 to 19, wherein a counterflow washing step alternates the paths of the filtrate and the air in order to impart medium motion at high speed stirring and variable semi-liquidization speed. A device for the removal of suspended and colloidal substances, including grease and oil, from waste water, comprising: a first filter vessel having a bottom and side walls, a first filter phase of particulate matter having an upper surface and adjacent the bottom of the first filter vessel; (Iii) a wastewater inlet device, a female cavity generally spaced below and below the first filtration phase, draining the filtered wastewater from the female cavity after the filtered wastewater is introduced through the first phase; And a second filter, a second filter smaller than said first filter container having a bottom and side walls located in said first filter container and above said first filter container, said particulate material having an upper surface and adjacent said bottom of said second filter container. A second filtration phase of, a second female cavity generally in and below the same space as said second filter phase, said second female cavity after said wastewater passes said second phase. A device for draining the filtered wastewater from the filtrate, a filtrate tank for receiving and storing a portion of the filtered wastewater drained from the first and second female cavities, suspended matter in the filtered wastewater backwashed for the heads and the A pump for backwashing the two filter beds separately or simultaneously with the filtered waste water from the filtrate tank for washing the filter bed, from the conduit to drain the backwash and filtered wastewater from the filter bed into a separate treatment step And a conduit for draining excess unfiltered wastewater to the wastewater pump chamber prior to backwashing, and a pump for circulating the excess unfiltered wastewater from the wastewater pump chamber to the waste inlet. . 23. The flow filter according to claim 22, wherein the waste water inlet part is connected to a flow rate indicator, the flow rate indicator outlet connected to the first and second filter vessels and the pipe, the flow rate control valve in the pipe, and the flow rate control valve are connected to the second filter. Particle media filtration device, characterized in that the wastewater flows directly above the speed given to the vessel and is configured to respond to the flow rate indicator. In a culvert structure in which a structure for supporting a support screen on an inlet medium filter is raised above the female cavity under the filter chamber, a body of horizontally and laterally extending rods for supporting the screen, equilibrated by a plurality of non-limiting spacers. Vertically spaced slip and lower palate extending vertically through the upper and lower plates so that the separated upper and lower plates can flow upward or downward through the oxidation chamber, liquid or gas, which are mutually extended to support the rod structure. Injecting into the oxidation chamber one or more of an air dispersing chamber with a space between the tip and the lower tip, which is normally closed by the bottom plate, a solution of air, oxygen, ozone or other gaseous dispersants or hydrogen peroxide or a halogenated compound The apparatus and the oxidant from the oxidation chamber The passing through just before the underdrain structure, characterized in that it is composed of a device to be introduced into the upward flow of the liquid and the filter. 25. The culvert of claim 24, wherein the sleeve has an orifice to allow the oxidant to pass upstream of the liquid from the oxidation chamber through the orifice. Wastewater treatment methods described in Tables I-III. Particle media filtration device for removing suspension and colloidal particles as described in the accompanying drawings. Culvert structure for supporting the support screen on the particle medium filter as described in the accompanying drawings. ※ Note: The disclosure is based on the initial application.