DE2144605A1 - FULLY BIOLOGICAL PLANT FOR WASTE WATER PURIFICATION USING DIFFERENT FLOW SPEEDS - Google Patents

Description

Yollbiologiscae plant for wastewater treatment with different flow velocities

Be s Q hording

The subject of the invention is a fully biological sewage treatment plant for the purification of wastewater and the like, in which, however, instead of dex * the usual sedimentation of suspended solids and their removal in the thickened state from the bottom of the clarifier, the suspended matter is separated from the purified water in an ascending XEEE stream of the to be cleaned Wastewater due to the different S ¹ Ue ^ velocities according to the specific weight of water and sewage sludge in funnel-shaped or channel-shaped! 'Rushes of the clarification basin is brought about.

In the case of fully biological systems for wastewater treatment, this will be Wastewater supplied to the sewage treatment plant after passing through a suction trap mechanically pre-cleaned or untreated to the ventilation space outdoors or with raw water pumping equipment forwarded.

The ventilation takes place with any ventilation equipment (e.g. surface aerator, floor aeration, etc.)

The microbes that form in the ventilation space feed, away from the organic contaminants of the sewage and clean it accordingly.

In the rehabilitation facility, all microbes, the so-called activated sludge, are separated from the water and completely or completely? ⁴ - partially fed back into the ventilation space so that the activated sludge concentration is retained and purified water free of activated sludge can be drained into the receiving water.

309ß 12/03 MJ

The separation of the sludge-Yfttsser mixture takes place preferably in the so-called clarifying basin. There are various designs of these secondary settling tanks, all η have in common that the activated sludge, due to its slightly higher specific weight than the Y / ater, sediments and at the bottom of the secondary settling tank is withdrawn in a more or less thickened state in order to be completely or partially fed back to the aeration basin. What they all have in common is that the separation of yellow sludge and water takes place in different directions, that is, the purified water mainly flows upwards ( Round basin) or to the side (longitudinal basin), while the activated sludge settles down W.

These processes are as old as wastewater treatment technology and have basically proven themselves.

Heavy or bulky material3 that is with in the secondary clarifier. (especially e.g. with the help of wastewater treatment of activated sludge processes without upstream mechanical Pre-cleaning) "Can be because their sinking speed is greater is as that of the activated sludge, at the bottom of the secondary clarifier accumulate and lead to blockages or the necessary Impair the recirculation of the activated sludge or prevent a functional impairment or an iirlie · the function of the secondary clarifier is the result «

Another major disadvantage * is that there are so many post-treatment facilities A large part of the activated sludge remains in the unaerated iYr: ch clarifier for too long because it is too much its specific weight does not fall into the / suction range g6 ± - A rotting and swelling up of the living mud is that This applies to secondary clarifiers mifilerer and before Willem Smaller wastewater treatment plants, especially then, weim them with high ones

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309812/0 3 18

8AO ORIGINAL

2U4605

long in the unventilated clarification room (S) 11 Ίιΐ 11 Πι 1, ιι 1111 ι ι ||| [> ιΐιΐΓΓι1, its specific weight and the ejji gb ^ tchen upward flow in the lower rope of the KM ^ eatflSes not into the suction area. The first step in finding and swelling up the activated sludge is the rule _. especially when they are driven with open volumes of sludge »

• Regarding the terminology, it should be noted that in contrast to the different.6n Term in the literature for Yorklar or collecting basin the word ventilation space and for liachklärbeken etc · the word clarifying room is used.

The novelty of the present invention relates to a method for the continuous separation of the activated sludge from the water » where activated sludge and purified water in the clarification room do not flow in opposite or different directions as usual and are consequently sucked off at opposite points in the clarification chamber, but in the opposite direction of the pleating and only have different pleating speeds due to their different specific 6-weight, due to which a separation of the activated sludge from the water is possible.

The further the activated sludge-Wassax-G-emic in the clarification room (2) reaches the top, the slower it becomes due to the invention arranged funnel-shaped or channel-shaped enlargement of the clarification room the rate of rise of the V / assera.

Info related to the slightly higher specific gravity of the activated sludge In contrast to that of water, the activated sludge does not work at a certain Pliessgeschv.digkeit the water flow more with it, but remain in a state of suspension and form a level of compressed activated sludge, iir forms aieh about the rate of rise of the water in the Clarification room from 0.5 to 1.5 m / h

SAD ORfGiNAt

Aicn bin or several suction pipes (6), uu ^ -ch the activated sludge dem The ventilation space (1) is fed back in by means of pumps (7) » 3jps or the suction pipes can be moved more or less vertically and enable Licneii the suction in each case desired height «

Substances that are heavier than the activated sludge cannot get into the suction pipe (6) serving as a return guide element and this given! 'block everything. Furthermore, different Dwell times ues activated sludge in the sewage plant (2) prevents αΐβ totality of the animate * Sludge with cleaned upward drainage i / assur ... is carried along, and only then separates from the i / asser, v / o the flow rate of the water is not flour enough to to pull the activated sludge even further upwards. At about this height, aes activated tea sludge is also discharged and returned to the ventilation space (1).

Separating.

The XsäxSäCK ¥ and (8; of the clarification chamber6s (2), which - in the case of an angular design - separates the ventilation chamber (2) from the ventilation chamber (1), can be designed in such a way that the imaginary downward extension of the partition wall intersects with the side wall of the Ventilation pumps (1) and not with its base plate, in order to reduce the possibility of the accumulation of bulky substances in the area of the narrow passage to the external space (2). In each case an inclined arrangement leading to the directional shape is required Reduction of the adhesion or turbulence is to be understood by the xrennwrnd (8) with suitable iUinststojggauflugen They caini aaoh consist of foils, the ventilation and flow-related slight vibration of which contributes to the falling off of adhering sludge particles.

The method described above for the treatment of sewage is also liquids lor the ijnttrübung, H _e inigung etc. other, aie suspended solids with a higher specific ϋ-θwicht as the enthalteil the liquid, suitable.

309812/0318 - 5 -

BATH

Claims (1)

S " Slide drawings represent-in vertical and horizontal sections. a square sewage treatment plant and ■ a round sewage treatment plant each. The numbers in the drawings mean: = Enema = Ventilation space = Clarification room = Ventilation device as floor ventilation (square Shape) and as a cone to divert the air (round shape) = Ventilation device as surface ventilation = drainage channel = Suction pipe = Pump = V / and between ventilation space and clarification space S chutzanaprücaa Method and device for separating sludge, suspended matter, etc. from water to be cleaned or other liquids, characterized by the fact that the suspended matter contained in an ascending flow of water or other liquid, influenced by pumps or the like and microbes, after passing through a ventilation space (i) in a preferably funnel-shaped or channel-shaped clarification space (2), experience compression in the zone in which their weight begins to be as great or greater than the buoyancy force caused by the inflow and outflow , .assers or other i'lüsuigkeit, here with xels suction pipes stK & (6) and pumps (7) t.bgtjsaugt unu in ÄasxJisiiiibkHHgjsfeBKksii ^ i ^ x the Belüfturigsrauin £ k ^ (1) are backbeföx-dext, while the 'Ji- suspended matter' disposed of, ascending V ^ -suer . over one AbL; uf rinne (5) - bgoleitat will. ν b 3 0 9 8 1 ■ -? / 0 3 1 8 BAD ORfGiNAL 21448 « 2 * Procedure and direction according to claim 1, d a dur c h gekennzeichue t, dt; ss the clarification room (2) one or several diagonally or vertically arranged partition walls (8), not reaching down to the floor or touching a side wall, on which suction pipes (6) are attached adjustable in height « 3. Method and device according to claims 1 and 2, characterized by the fact that the Inlet openings of the suction pipes (6) through any Connections and facilities together in the most appropriate height for the suction of the compacted sludge bait Suspended solids can be adjusted. 4. The method and device according to claims 1-3, identified by the fact that; the Partition (8) consists of a plastic film, those caused by ventilation and flow technology slight vibration, continuously cleans itself, ο method and device according to claims 1-4, Sa du rc II marked that, the Partition (8) of the clarification space (2) to the ventilation space (1) in its imaginary extension an intersection point "not with the base plate, but with a side wall of the ventilation space (1). 6. The method and device according to claims 1, 2, 5 and 5, characterized in that the Inner walls of the clarification room (2) in the hazard area the accumulation of sludge or suspended matter ge ^ en adhesion and the d «of about caused turbulence auroh repellent Covers e.g. made of plastics or other Ci-as layers e.g. be protected by rising air. - 7 -30 98 I 2/03 in Procedure and procedure in accordance with requirement a 1-6, characterized in that control devices both the buoyancy of the sewage water as record its flow velocity in the clarification room (2) and the suction in the zone of optimal sealing influence. 309812/0318