DE3244577A1 - Process and machine for mechanical/biological waste water treatment for compact plants - Google Patents

Abstract

The process and the machine for mechanical/biological waste water treatment for compact plants, preferably in combination tanks having internal secondary settling, are characterised in that the arrangement of a conveyor unit (13) gives an overall favourable solution from the point of view of investment costs and oxygen input efficiency. Moreover, the overall concept is considerably improved in that the secondary settling tank can be designed having a flat base and the activated sludge is continuously introduced by direct routes into the intensive aeration zone. <IMAGE>

Description

Process and machine for mechanical,

biological wastewater treatment for compact systems The invention relates to a method with which it is possible to combine the biological part of a compact sewage treatment plant and the mechanical secondary clarification, as well as the sludge return and separation of the excess sludge, so that once optimal process conditions are created and, on the other hand, an extremely inexpensive system design is created.

Such a method and equipment is extremely practical Interest, as there is an increasing amount of energy-saving and low-maintenance concepts are of great economic interest and are also inexpensive Systems encourage potential operators to invest.

This opens up more options for broad-based environmental protection, in In this case, water protection was created.

It is state-of-the-art thanks to the sometimes very complex ventilation processes to equip with special machines for the animation.

These are usually circumferential bridges at dog pools, which ventilation units and circulation devices are attached to the The only goal is to optimally circulate the activation and to supply it with oxygen.

As a rule, an rtpd is also used for clarification Bridge used, which specifically meets the requirements of the process technology required there is adapted.

There are also systems that try to do justice to both. But these have the disadvantage that separate, expensive structures and oil machines are necessary for sludge management.

Next there are systems, whereby the process technologies for the activation and the clarification are completely separate.

However, all systems on the market have the same thing in common Disadvantage of causing relatively high investment and maintenance costs.

The invention is intended to counteract this situation in particular will.

The object of the invention is achieved in that one on a Combination basin with an external ring-shaped animation (i) and an internal one Secondary clarifier (2) a circular bridge (3) is attached, which with the required speed for the secondary clarifier (2).

The secondary clarifier (2) is designed with a flat bottom so over the tooth-shaped shields (4) and over the siphon tubes (5) which are on the sole deposited sludge can get into the channel (6).

This is then by means of the screw conveyor (7) or another suitable conveying unit lifted into the channel or line (ES).

Normally, the so-conveyed and quantity-controlled sludge flows through the channel outlets (9) to the activation (i) as return sludge.

The excess sludge is via a line (10) into a drainage channel (11) guided on the central structure. A pipe (12) then leads this to the sludge container (not shown).

The floating sludge of the secondary clarifier (2) is via the same drainage channel (ii) and the pipe (12) derived.

The channel (6) also serves as S chwi mnischl arornschi Id and has a skim tank with a pump sump on the outside, in which a submersible motor pump sits and conveys the floating sludge that arises into the pipeline (1 @).

In the aeration tank (1) is on the bridge (3) to avoid deposits and a conveyor unit to produce a rotation of the aeration tank contents (13) attached.

The delivery unit (13) can also be designed so that it is simultaneously causes a corresponding entry of air.

Depending on the requirements and the required performance of the activation (1) additional delivery units (13) or

other suitable air injection machines or devices attached such as ventilation grille (14) with ventilation candles (15) and the compressed air generators (16).

Thus it is possible to use the process or the system any on the market assigned properly functioning ventilation device located.

That or the delivery units (13) also have the task of over to create a high-speed zone for the ventilation devices, which the takes air to be introduced and thus for a longer contact time with the Al -) - water cares.

This is the spec. Increased oxygen entry and thereby that the entire contents of the ring basin is set in rotation, deposits are avoided.

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Claims (5)

Claims main claim method for mechanically biological #sewater treatment for compact systems, preferably for Kornbi basins with internal Secondary clarifier (2) and an external ring-shaped activation system (1), characterized in that that the delivery unit (13) for the aeration tank (1) just before the aeration unit (14 + 15) is arranged on the rotating bridge (3), so that the air bubbles with the water jet of the delivery unit (13) are displaced in the direction of flow and thus longer contact time with the wastewater is given. 2. Main claim characterized in that that described under 1 Ventilation or other suitable external ventilation with an internal Secondary clarifier (2) is combined with a flat sole, in such a way that a suction scraper can get the sludge from the testicles over the liver tubes (5) into a channel (6) leaves. The sludge is then conveyed via a screw conveyor (7) Channel (8) or a pipe line (10) directly the activation (1) as back sludge or fed to further use as excess sludge. 3. Machine according to main claims 1 and 2, characterized in that the delivery unit (13) can be provided with different impeller shapes. (E.g. oblique blade, propeller, screw, vortex impeller, etc.) 4, Machine according to main claims 1 and 2, characterized in that the screw conveyor (7) can also be replaced by other suitable delivery units. 5 machine according to main claims 1 and 2, characterized in that the feed unit (13) is arranged obliquely from top to bottom and optionally can also bring in air at the same time.