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Patent Searching and Data


Title:
TECHNOLOGICAL SYSTEM FOR WASTEWATER TREATMENT
Document Type and Number:
WIPO Patent Application WO/2020/214041
Kind Code:
A1
Abstract:
The subject matter of the invention is a technological system for wastewater treatment that enables the improvement of the energy efficiency of wastewater treatment, the reduction of BOD and COD levels in wastewater. The technological system for wastewater treatment using the source of wastewater passing through a grate, a sand trap and a preliminary settling tank, which is discharged as treated effluents at the final treatment step, is characterised in that there is a structuring unit (8) installed between connected denitrification (9) and nitrification (11) tanks and a final settling tank (12). The structuring unit (8) is arranged in a cascade-like structure and consists of a series of repeatable sets of components placed inside a leak-tight casing (21) sealed with caps (27), (27'). An air pipe (14) fitted with multiplied aeration components (24) along its whole inner length, placed inside the casing (21), and a water pipe (15) fitted with an inflow connector pipe (16) and an outflow connector pipe (13) are connected to the cap (27). The water pipe (15) is composed of a series of diffusers (17) fitted around their perimeter with centring rings (22) and annular magnets (18) and turbulent flow elements (19), after which there are air expansion nozzles (20), where the water flow through the technological unit is controlled by a control unit (10) which controls water oxygenation up to the level of 30 g/m3 and ensures the discharge of water with pollutant content up to 2 g/m3.

Inventors:
GLUCH MIROSŁAW (PL)
KARCH JAN (PL)
Application Number:
PCT/PL2020/000041
Publication Date:
October 22, 2020
Filing Date:
April 17, 2020
Export Citation:
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Assignee:
HYDRESET AG (CH)
GLUCH MIROSLAW (PL)
International Classes:
C02F3/20; B01F5/04; B01F5/06; B01F13/10; C02F3/30
Foreign References:
US5798044A1998-08-25
DE102007032125A12009-01-08
US20130098815A12013-04-25
PL209219B12011-08-31
Attorney, Agent or Firm:
RYGIEL, Andrzej (PL)
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Claims:
Claim

The technological system for wastewater treatment using the source of wastewater passing through a grate, a sand trap and a preliminary settling tank, which is discharged as treated effluents at the final treatment step, characterised in that there is measuring system (7) and a structuring unit (8) installed between connected denitrification (9) and nitrification (11 ) tanks and a final settling tank (12), where the structuring unit (8) is arranged in a cascadelike structure and consists of a series of repeatable sets of components connected together and placed inside a leak-tight casing (21 ) sealed with caps (27), (27’), where an air pipe (14) fitted with multiplied aeration components (24) along its whole inner length, placed inside the casing (21 ), and a water pipe (15) fitted with an inflow connector pipe (16) and an outflow connector pipe (13) are connected to the cap (27), where the water pipe (15) is composed of a series of diffusers (17) fitted around their perimeter with centring rings (22) and annular, preferably neodymium, magnets (18) and turbulent flow elements (19), after which there are air expansion nozzles (20), where the water flow through the technological unit is controlled by a control unit (10) which controls water oxygenation up to the level of 30 g/m3 and ensures the discharge of water with pollutant content up to 2 g/m3.

Description:
TECHNOLOGICAL SYSTEM FOR WASTEWATER TREATMENT

The subject matter of the invention is a technological system for wastewater treatment that enables the improvement of the energy efficiency of wastewater treatment, the reduction of BOD and COD levels in wastewater.

Currently, wastewater treatment is a multistep process and consists in the separation of suspended solids from wastewater collected in a tank, followed by the aeration of wastewater, which is carried out in the oxidation process using aerobic bacteria. Aeration is performed using a compressor or pump unit and usually deep aeration, during which air is pumped into wastewater through porous material or sieves thus additionally mixing it, in addition to oxygenation, or aeration by means of jet systems using pumps submerged in wastewater, or aeration through surface aerators, followed by the denitrification process consisting in the reduction of nitrates to nitrogen and the sedimentation of sludge produced during the foregoing processes, then the sludge so obtained is removed from the tank and discharged to the environment.

The known process is an energy-consuming process, especially due to high power consumption by aeration equipment. The maintenance of the proper level of oxygenation of a bacteria bed, which might lead to its degradation in extreme cases, poses great problems as well.

The purpose of the invention is to develop a technological system for wastewater treatment that will ensure that sludge volumes are reduced by precise control of bed aeration during the aerobic process and water reaches the natural level of oxygen saturation. This solution also enables the full monitoring and control of the processes taking place in a wastewater treatment tank, with pre-set processing parameters, and the remote control of such processes.

The technological system for wastewater treatment using the source of wastewater passing through a grate, a sand trap and a preliminary settling tank, which is discharged as treated effluents at the final treatment step, according to the invention is characterised in that there is a measuring system and a structuring unit, which is arranged in a cascade-like structure and consists of a series of repeatable sets of components connected together and placed inside a leak-tight casing sealed with caps, installed between connected denitrification and nitrification tanks and a final settling tank. An air pipe fitted with multiplied aeration components along its whole inner length, placed inside the casing, and a water pipe fitted with an inflow connector pipe and an outflow connector pipe are connected to one cap. The water pipe is composed of a series of diffusers fitted around their perimeter with centring rings and annular, preferably neodymium, magnets and turbulent flow elements, after which there are air expansion nozzles, where the water flow through the technological unit is controlled by a control unit which controls water oxygenation up to the level of 30 g/m 3 and ensures the discharge of water with pollutant content up to 2 g/m 3 .

The advantage of the technological system for wastewater treatment is energy consumption lower in comparison with known systems and achieving the discharge of water with pollutant content not higher than 2 g/m 3 .

An exemplified embodiment of the subject invention has been shown in the drawing, where Figure 1 shows the technological system for wastewater treatment in a block flow diagram, Figure 2 shows a longitudinal section of the structuring unit, and Figure 3 shows a view of the structuring unit from the side of the cap. As the drawing shows, the technological system for wastewater treatment uses the source of wastewater i which passes through the grate 2, the sand trap 3 and into the preliminary settling tank 4. 02 and pH are measured by the measuring system 5 between the grate 2 and the sand trap 3. Effluents flow from the preliminary settling tank 4 into the tank 6, where they are subject to dephosphorization and then into the denitrification tank 9, where they are additionally fed with oxygen-rich structured water, of adjustable oxygen level, coming from the structuring unit 8, which is fed only with treated effluents. The denitrification tank 9 is connected to the nitrification tank 11., with nitrate recirculation taking place between them, and in addition there is the 02 and pH measuring system 7 installed between the nitrification tank H ar) d the final settling tank 12. The structuring unit 8 is arranged in a cascade-like structure and consists of a series of repeatable sets of components, thus multiplying the effect of oxygen dissolution, placed inside the leak-tight casing 21. sealed with the caps 27, 27\ The air pipe 14 fitted with the multiplied aeration components 24 along its whole inner length, placed inside the casing 21 , and the water pipe 15 fitted with the inflow connector pipe 16 and the outflow connector pipe 13 are connected to the cap 27. The water pipe 1j> is composed of a series of the diffusers 17 fitted around their perimeter with the centring rings 22 and the annular, preferably neodymium, magnets 18 that cause rapid bond cleavage, in other words the structuring, and the turbulent flow elements 1JJ that cause flow homogenization and aeration - water oxygenation, preferably within a scale of a few millimetres, after which there are the air expansion nozzles 20. Water flow into the final settling tank 12 and the denitrification tank 9 and water flow after final wastewater separation into the structuring unit 8 is controlled by the control unit 10 which controls water oxygenation up to the level of 30 g/m 3 and ensures the discharge of water with pollutant content up to 2 g/m 3 .