DE202004006455U1 - Transportable or semi-underground small plant treating domestic gray water or sewage, includes sections for sedimentation and activated sludge processing - Google Patents

Abstract

Two partitioned stages operate in a closed tank (1), sedimentation (2) and activated sludge processing (3) with an immersed membrane. A service water tank (6), access (4) and service chamber (5) are included.

Description

The The invention relates to a modular small sewage treatment plant for non-permanent use.

In These modularly constructed small sewage treatment plants can do the entire home Sewage, that is Black and / or gray water, as well as domestic waste water in its Composition like that Waste water can be cleaned fully biologically.

It is known method for biological purification of organic contaminated waste water, where the solved Waste water ingredients are implemented microbiologically and the treated Wastewater afterwards is separated from the biological sludge, in which microbial implementation under pressure accomplished and the separation of the treated wastewater from the biological Sludge is made through a membrane or ultrafiltration.

It are also regulated oxidation small sewage treatment plants as a small sewage treatment system for household waste water and commercial wastewater known which work fully biological and for which the connections (Inflows and outflows) between reservoirs, aeration shaft, secondary clarification and Sludge stacking space, as well as the air supply in the activation shaft (oxidation) electronic pneumatic control can be regulated so that a high degree of mineralization of the sewage material is achieved.

Known are also multi-chamber small wastewater treatment plants, where the existing connection and overflow openings are closed, the wastewater to be cleaned in batches by pneumatic pumps and is transported from chamber to chamber in a controlled manner.

It are also small sewage treatment plants, executed as Impoundment over-ventilation system with ventilation through surface gyroscope or by means of an agitator and Additional air supply known.

Farther are also variants as a back-up oxidation system known in shaft construction, which in a shaft container primary clarification shaft, oxidation shaft and secondary clarification shaft unite.

Known is widely that with Membranes, especially with microfiltration membranes Separation of solids from liquids directly in the activation tank possible is.

at sewage treatment plants with aeration tanks are so far in the municipal area with high TS concentrations only crossflow systems in use.

to Prevention of deposits or cover layers in the Crossflow process on the membranes becomes a gas / liquid mixture with one enough turbulent flow or else the friction of the membranes against one another is used. The transmembrane pressure difference is determined by applying a negative overpressure, which generated by pumping or using gravity, overcome on the permeate side.

Small wastewater treatment plants in accordance with DIN 4261 Part 1/2 for less than 8 m ^{3 of} wastewater per day have so far been designed as drainless pits, three-chamber septic tanks, trickling filters, aeration plants or plant sewage treatment plants.

From the published application DE 19534657 is a small sewage treatment plant for domestic wastewater, with storage, activation, clarification and later stages not explained in detail known.

at This process is a conventional activated sludge process without immersed microfilters, in which the wastewater is only sedimented from activated sludge flakes / bacteria.

adversely is that a extensive sterility with a secondary clarifier with sedimentation / Gravity separation not possible is and that coarse matter not in the clarifier divided and thus not made accessible to the biological process that Primary sludge production is very high and the system described is not in closed clear can be operated.

Farther plants are known which use secondary settling tanks work with sedimentation / gravity separation.

This are described for example in JP 54-63553 and in a Article by BlOforum 4/94, pp. 129–135.

there the wastewater is only sedimented by activated sludge flakes / Bacteria cleaned. Extensive sterility is with only one secondary clarifier not possible with sedimentation / gravity separation, the use of centrifugal pumps, as suggested in JP 54-63553, has the disadvantage that the used Centrifugal pumps susceptible are in the activated sludge and the flake structure of the activated sludge to destroy.

All previously known small sewage treatment plants however, have the disadvantage that they are based on a known Process with the three process stages of preliminary clarification, oxidation and clarification.

Furthermore runs at the previously known small sewage treatment plants a hydraulic shock only slight muted through all process stages. This has a shorter stay and an increased proportion of sludge and therefore a poorer cleaning performance.

Out municipal wastewater treatment plants often have to size Volumes are disposed of one to several times a year. For this, the Sludge from primary clarification or other containers like basins or tanks. This removed faecal sludge from the preliminary clarification has an unpleasant smell and is hygienically questionable.

adversely is also that conventional submersible sewage pumps contain rotating parts, especially at low electrical port services no over longer Reliable over time work.

The contaminants such as hair contained in the wastewater and other fibers often to the failure of the pump.

Are also from the DE 198 07 890.0 Wastewater treatment plants known, which use the membrane technology.

adversely with all of these facilities, however, is that required intervention at in outside areas installed systems can only be carried out when there is no frost and because of which it is often exceeded Maintenance intervals only limited powerful are or can only be used in closed rooms due to their design

task the invention is to provide a device for wastewater treatment create which works energy-optimized and for the treatment of home Sewage as well as domestic Waste water suitable in its composition similar to waste water as well anywhere also outside of buildings can be used.

This Object is achieved by a device according to the main claim 1, in the dependent claims 2 to 5 further design options are described.

The small sewage treatment plant according to the invention will be closer below explained become.

This is what the 1 and 2 , which represents the small sewage treatment plant in different geometrical designs.

deviant of the geometric design variants shown, however other variants are also conceivable and subject to the scope of protection consider.

The modular small sewage treatment plant according to the invention consists of a closed chamber housing 1 , in which two process stages, namely a pre-clarification chamber 2 and an activation level 3 are arranged with immersed membranes.

The primary clarification chamber is preferred 2 and the activation level 3 arranged side by side, since these two chambers are technically connected to each other.

The chamber housing 1 is dimensioned so that its width is the sum of the width of the primary settling chamber 2 and the activation level 3 equivalent.

The height of the chamber housing 1 is dimensioned so that a person through the boarding 4 in the top surface of the chamber housing 1 getting in the maintenance room 5 can move enough for the work to be carried out.

Another chamber 6 as storage for the process water obtained in the clarification process is in the bottom area of the chamber housing 1 arranged and designed so that it can be used as a running surface for the person entering for maintenance.

Through this additionally arranged domestic hot water tank 6 an increased pressure difference is realized across the membranes and it is therefore possible to lift the process water out of the system without a pump.

Here is the pre-clarification chamber 2 In addition to its actual function as a storage for coarse materials and sludge, it is also dimensioned as a waste water storage.

In the pre-clarification chamber 2 a circulating device and a conveying device are arranged.

The activation tank 3 is via another pipe connection to a domestic hot water tank 6 connected.

For this is in the upper area of the aeration tank 3 an outlet opening equipped with microfiltration membranes is arranged.

The exhaust air escaping from both tanks 2 and 3 is discharged using pipe connections.

In a further embodiment of the solution according to the invention, the design and dimensioning of the chamber housing 1 it can be adapted to the location of the small sewage treatment plant.

So is this chamber housing 1 To be carried out in such a way that lifting by means of lifting devices such as cranes etc. without deformation of the chamber housing 1 is possible.

Also it is conceivable the small wastewater treatment plant for permanent Use in the ground.

The for such small wastewater treatment prescribed chemical and physical parameters for wastewater quality safely adhered to in the procedural sequence.

The purified wastewater is additional largely germ-free and can therefore be used as process water for another Usage.

On Another advantage of the small sewage treatment plant according to the invention is that it can be used of low-voltage drives with, for example, solar energy.

Claims (5)

Transportable small sewage treatment plant for the treatment of black and / or gray water, domestic waste water and domestic waste water in its composition similar waste water, can be set up at ground level and used for direct underground installation, consisting of a closed chamber housing 1 , in which two process stages, namely a pre-clarification chamber 2 and an activation level 3 with immersed membranes and a domestic hot water tank 6 , an approach 4 as well as a maintenance room 5 are arranged. Transportable small sewage treatment plant according to claim 1, characterized in that the primary clarification chamber 2 and the activation level 3 are arranged side by side. Transportable small sewage treatment plant according to claim 1, characterized in that the chamber housing 1 is dimensioned so that its width is the sum of the width of the pre-clarification chamber 2 and the activation level 3 equivalent. Transportable small sewage treatment plant according to claim 1, characterized in that the height of the chamber housing 1 is dimensioned so that a person through the boarding 4 in the top surface of the chamber housing 1 getting in the maintenance room 5 can move sufficiently and independently of the weather for the work to be carried out. Transportable small wastewater treatment plant according to claim 1, characterized in that the surface of the domestic hot water tank 6 is to be used as a tread for the person entering for maintenance.