DE20221745U1 - Device for sludge guidance from a wastewater treatment plant - Google Patents

Abstract

contraption to the mud guide from a dirty water treatment plant into a drainage and composting containers, characterized in that the supply line (15a) is parallel to the bottom (10) of the drainage and composting container (5) and / or over the upper edge of the drainage and composting (5) will, without the tank bottom (10) to cut.

Description

The The invention relates to a device for sludge guide from a wastewater treatment plant into a drainage and composting containers, wherein sludge and / or thick matter from different sources the soil area a drainage and composting container be fed so that the residual water trickles down, while the the upper part of the solids is increasingly dried and composted becomes.

Of the big advantage of direct drainage is that no digestion processes occur, causing the odor is minimized that no corrosion takes place and no hydrogen sulfide accrues.

The Invention represents a significant improvement over conventional ones Method of delivery of sludge in Dickstoffabscheider and an improvement of previous devices.

field of use is the decentralized wastewater treatment with simultaneous Recycling and disposal of sludge and / or sludge on site within the framework of the circular economy.

Known is a device and a method for wastewater treatment after EP 0409367 in which the dirty water is fed to a lower tank section (settling area) in which sludge and / or thick matter settles out of the dirty water in which they are suspended. The sludge and / or the settled thick matter are pumped at intervals over time via a vertical feed line in the bottom portion of the upper container portion, wherein the feed is guided through the bottom of the upper portion. The upper tank section serves as a dewatering and composting vessel for drying and decomposing the sludge fed from below and / or the thick matter as the dewatering water drips back into the settling area.

The Water is used for further treatment (decomposition of the dissolved substances) by a commercial Drain pipe removed.

On the upper container portion a biofilter sits on and ventilation, with natural products with special bacterial growth (biofilm) is equipped, whereby odor-causing substances of the escaping Exhaust air degraded or retained.

The Device is preferably applied underground, so only the lid and the biofilter remain visible, leaving the entire Plant for example in the garden visually does not bother you and the required floor space remains usable elsewhere.

This The state of the art is known as the MUTEC system.

• • die Zuführung des Schlammes und/oder der Dickstoffe durch den Boden des oberen Behälters, was hohen Material- und Arbeitsaufwand zur Abdichtung zur Folge hat,
• • der Bedarf einer Rückschlagklappe oder eines sonstigen Rückflussverhinderers am Austritt der Schlammzuführung, wodurch regelmässig technische Störungen hervorgerufen werden,
• • das begrenzte Nutzvolumen der gesamten Vorrichtung, da ab einer gewissen Größe sehr aufwändige Aushubarbeiten des Erdreiches am Einsatzort nötig sind; oft behindert hartes Gestein in größeren Tiefen den Aushub und/oder man trifft bereits auf Grundwasserleiter, die zu einem ungewollten und technisch problematischen Auftrieb der teilweise Luft-gefüllten Vorrichtung führt,
• • der hohe bauliche und technische Aufwand auch dort, wo nur Bedarf für eine kleinere Lösung für geringere Wassermengen besteht, beispielsweise für eine Ferienwohnung für zwei Personen,
• • die Austrocknung des Biofilters, der an der Oberfläche Wind, Sonneneinstrahlung, Temperaturschwankungen und sonstigen Witterungseinflüssen ausgesetzt ist, die einen häufigen Austausch des biologisch aktiven Materials notwendig machen; da die Ausreifung eines neuen Biofilms bis zur vollen Aktivität bis zu zwei Wochen dauert, bringt der Austausch jeweils erhebliche Funktionsverluste mit sich,
• • der unregulierte Abfluss des Wassers zur weiteren Behandlung
• • der Verbleib von Schwermetallen und anderen unerwünschten nicht biologisch abbaubaren Verunreinigungen im kompostierten Schlamm und/oder in den kompostierten Dickstoffen, die dessen/deren Nutzung im Garten oder in der Landwirtschaft einschränken,
• • der Verbleib relativ hoher Anteile gelöster und suspendierter Stoffe, insbesondere Phosphate, im abgeführten Wasser,
• • die bisher fehlende Möglichkeit, zusätzlich oder ausschliesslich Schlamm und/oder Dickstoffe aus externen Quellen im MUTEC-System zu kompostieren,
• • die bisher fehlende Möglichkeit, vorhandene Dreikammergruben für das System zu nutzen.

A disadvantage of the prior art

• The supply of the sludge and / or the thick matter through the bottom of the upper container, which results in high material and labor for sealing,
• The need for a non-return valve or other non-return valve at the outlet of the sludge feed, which regularly causes technical faults,
• • The limited useful volume of the entire device, since from a certain size very elaborate excavation of the soil at the site are necessary; hard rock often hinders excavation at greater depths and / or one already encounters aquifers, which leads to unwanted and technically problematic buoyancy of the partially air-filled device,
• • The high structural and technical effort even where there is only a need for a smaller solution for smaller amounts of water, for example, for a holiday apartment for two people,
• • dehydration of the biofilter, which is exposed to wind, solar radiation, temperature fluctuations and other weather conditions on the surface, which necessitate frequent replacement of the biologically active material; Since the maturation of a new biofilm takes up to two weeks to full activity, the replacement brings each significant loss of function,
• • the unregulated discharge of water for further treatment
• • the presence of heavy metals and other undesirable non-biodegradable contaminants in the composted sludge and / or in the composted sludge which limits its use in the garden or in agriculture,
• The retention of relatively high levels of dissolved and suspended substances, in particular phosphates, in the discharged water,
• • the previously missing possibility of additionally or exclusively composting sludge and / or sludge from external sources in the MUTEC system,
• • the previously missing possibility to use existing three-chamber pits for the system.

Of the Invention is therefore based on the object to a device create, with which the above-mentioned disadvantages in the state of Technique to be fixed.

These The object is achieved by the features in the characterizing part of claim 1 in cooperation with the features in the preamble. Advantageous embodiments of the invention are in the subclaims contain.

One particular advantage of the invention is that the bottom of the drainage and composting container no longer expensive must be broken and sealed, but that the mud and / or the thick matter in the bottom area of the drainage and composting containers are supplied, without being passed through the container bottom.

The Invention will be described below with reference to at least partially in the Fig. Illustrated embodiments be explained in more detail.

It demonstrate:

1 Prior art, vertical section

2 Feed variant from the side,
Addition of filter basket and throttle plate

3 Feed variant over the edge of the drainage and composting tank

3a Compact version without pump

4 Variant with additional external sludge feed

5 Compact version on top of each other

6 Arrangement in three-chamber pit, longitudinal section

6a Arrangement in three-chamber pit, cross-section

7 Arrangement side by side for higher useful volume

8th Arrangement juxtaposed with self-gradient

9 Possible combinations with foreign sludge sources

10 Throttle type T in top view

11 Throttle disc type V in top view

12 Scheme of an arrangement with sludge pretreatment

1 shows the state of the art, the MUTEC system. Two container sections 5 and 6 are stacked, with dirty water over the inlet 7 in the lower settling area 6 is directed. Solid contaminants settle and are supplied by a pump for sludge and / or thick matter 15 in the upper container section 5 promoted, in which the sludge and / or the thick matter dehydrated and composted. The resulting residual water seeps through sieve openings in the bottom and / or wall region of the upper container portion back into the lower container portion (Absetzbereich). It is crucial that the wet sludge and / or the fresh moist thick matter are not applied from above, but that of Kompostierbehälter 5 from below, while overlying mud layers are increasingly composted and dry undisturbed.

The sludge and / or the thick materials are conveyed axially vertically upwards into the upper container section. A non-return valve 11 prevents backflow when the pump is switched off. According to the prior art leads the thick-matter line 15a via a plug connection 12 through the bottom of the upper container section 5 , which has a high material and labor costs for sealing result. In the device according to the invention, these disadvantages are avoided by the mud and / or the thick matter are not passed through the bottom of the dewatering and Kompostierbehälters.

2 shows a feed variant in which the sludge and / or the thick matter from the side horizontally introduced into the bottom region of the dewatering and Kompostierbehälters. Here is 12 a detachable connection of the thick matter line. 2 also shows a further advantageous embodiment of the MUTEC system with filter 23 and throttle disc 24 , A filter 23 prevents floating and suspended matter through the drain 8th get into the further water treatment. A throttle disk 24 that the cross section of the drainpipe 8th according to 10 or 11 fills, regulates the drainage.

To improve the overview were the objects 23 and 24 omitted in the following figures.

3 shows a Zuführungsvariante over the upper edge of the composting container. In this inventive course of the supply line eliminates the labor and sealing material-consuming opening of the wall of the drainage and Kompostierbehälters. Hereby poses 12 a detachable connection of the thick matter line and 4 a vent or vent to prevent a suck-back effect while the pump is not operating. Through this vent hole, which may be replaced by an aerator, he a non-return valve or other backflow preventer, which often causes technical interference.

3a is an advantageous embodiment of the MUTEC system for smaller amounts of dirty water, for example, for a 2-person household. Here, the dirty water is not introduced into a separate Absetzbereich, but directly into the bottom of the drainage and Kompostierbehälters 5 , The dripping water collects in the collecting area 17 and enters from there into the process, while the sludge and / or the thick matter settle directly in the dewatering and Kompostierbehälter; thus eliminating both a separate Absetzbereich, as well as a pump to promote sedimented sludge and / or thick matter in the drainage and Kompostierbehälter. A tee 15b in the angle of the supply pipe allows visual inspection and maintenance of the pipe

4 shows an advantageous embodiment for the additional supply of external sludge via a supply line 1 using a duo distributor 2 dewatered and composted together in the dewatering and composting tank. This has the great advantage that even sludges from other wastewater treatment processes can be composted according to the MUTEC system and recycled ecologically as part of the circular economy. A schematic arrangement shows this 9 , Instead of several supply lines 1 Also, a supply line can be fed simultaneously or sequentially from different sources.

5 to 8th show various arrangements of the device described herein, which are advantageous for different local conditions. In all variants, the biofilter 13 no longer placed above ground on the MUTEC system as in the prior art, but buried buried in the ground. This offers the decisive advantage that the natural materials and the living microorganisms of the biofilter are no longer exposed to temperature fluctuations, dehydration and other weather conditions. Thus, the life of the biofilter increases significantly over the conventional application. In addition, the cleaning performance improves since every replacement of the biological material in the biofilter is associated with a less efficient biofilm adaptation and development phase (2 to 3 weeks). By extending the life of a filling these less efficient transition phases are eliminated.

5 shows the compact version, in which the drainage and Kompostierbehälter 5 above the settling area 6 is arranged. This configuration is recommended if anyway a new excavation for the system must be dug.

6 shows a vertical section through an arrangement in which an existing three-chamber pit forms the container of the system. This is the drainage and Kompostierbehälter 5 in an insert next to instead of above the settling area 6 , A pump 14 promotes drained seepage water through the return line 16 back to the settling area.

6a shows a plan view of the cross section of a commercial three-chamber pit, in the half 6 as settling area and the quarter 9 be used for further treatment of the water. From the settling area 6 in the area for further water treatment 9 leads a process 8th , In the remaining quarter there is an insert for the drainage and composting tank 5 ,

7 shows a device for a significantly larger useful volume. The depth for the in 1 - 6 devices described is usually limited to three meters, since the high air content in the system (average 70%) causes too much buoyancy when the excavation reaches into the groundwater. Any increase in the diameter of the settling area 6 is limited by the pump power and usually also leads to further effort to ensure the function. The solution to these problems is inventively characterized in that the useful volume is increased by two juxtaposed container, in addition, the proportion of air per container can be reduced by this arrangement to 30%. The feed 7 takes place in the settling area 6 , the settled sludge and or thick matter are from a pump 15 over the thick matter line 15a into the drainage and composting tank 5 pumped, which is at the same height next to the container with the settling area 6 is arranged. A pump 14 in the bottom area of the drainage and composting tank 5 serves the return of the leachate 16 in the settling area 6 , In the drainage and Kompostierbehälter is the process for further water treatment 8th arranged. Also in this device is the biofilter for ventilation 13 weatherproof, preferably arranged underground, only the upper opening protrudes from the ground. In addition, an air circulation line connects 18 the two containers. A particular advantage of this air circulation pipe is that it uses the air volume of the domestic pipe and optimizes the thermals for air exchange. Alternatively or additionally, a forced ventilation in the form of a blower is possible.

8th shows an advantageous embodiment of in 7 described device in which the Drainage and composting tanks 5 offset above the settling tank 6 is arranged, for example, in the case of particularly complex mine excavation, hard rock layers, high aquifers or existing hillside. The return of the leachate 16 takes place without pump in the own gradient. Opposite to the flow direction of the return water, air flows at the same time, so that this variant also offers the advantage of a more intensive ventilation.

9 shows schematically the combination possibilities of the invention described so far with foreign sludge sources. Using the in 4 described duo distribution 2 Can the drainage and composting tank 5 and or the complete MUTEC system 19 Any sludge and / or thick matter from other sources are supplied, for example, detached biofilm from a fixed bed reactor 20 and / or sludge from an SBR (sequencing batch) reactor 21 and / or backwashing sludge from a trickling filter 22 ,

10 shows a throttle plate type T in supervision. The areas 27 consist of water-impermeable material, for throttled water passage is a gap 26 , The water level 28 normally leaves an airspace 25 free, on the one hand serves the simultaneous air circulation, on the other hand as an emergency overflow. The throttle plate prevents that in case of a hydraulic shock load (for example, the simultaneous emptying of several baths) not sufficiently settled or re-stirred sludge and / or thick matter unwanted by the process 8th be rinsed.

11 shows a throttle plate type V in supervision. The type V is compared to the type T an advantageous embodiment, since the area traversed 26 with rising water level 28 automatically multiplied until the emergency overflow 25 is being used.

12 shows the scheme of an arrangement with mud pretreatment, this is 19 the MUTEC system with or without settling area into which compostable sludge and / or thick matter from any source are supplied. In order to obtain usable compost in horticulture, landscaping and / or agriculture, limit values for heavy metals and other non-degradable pollutants must be observed. It is therefore advantageous not to introduce such pollutants into the system at all. This is achieved by the upstream of a sludge treatment 30 in front of the inlet 1 to the MUTEC system. It depends on the individual thick matter sources as well as the planned utilization of the compost, whether a sludge treatment of the entire cargo takes place, or whether only correspondingly contaminated partial flows with a sludge treatment 30a be treated.

Without fig .:
A further advantageous embodiment is the implementation of a phosphate precipitation in Absetzbereich. In order to reduce the phosphate content of the water even before the expiration in the further water treatment, commercially available precipitant may be added to the settling range of the system. The resulting sinking phosphate complexes are integrated together with the remaining accumulating sludge and / or thick matter in the dewatering and Kompostierbehälter in the resulting compost.

The Invention is not limited to the embodiments shown here. Rather, it is possible by combination and modification of said agents and teristics further variants to realize without departing from the scope of the invention.

1

feed pipe for mud

2

Duo distribution

3

baffle plate

4

ventilation opening

5

drainage and composting container

6

settling

7

Intake to the MUTEC system

8th

procedure for water treatment

8a

baffle

9

Area for further Water treatment

10

ground of drainage and composting container

11

Backflow prevention, for example, check valve

12

Detachable connection the thick matter line

13

biofilter for ventilation

14

pump for return water

15

pump for mud and / or high solids

15a

Thick stock conduit

16

return for leachate

17

catch area for drained slop

18

Air circulation line

19

MUTEC system

20

Wastewater treatment Third, for example, fixed bed reactor

21

Wastewater treatment Third, for example, SBR (sequencing batch) reactor, for example aquamax

22

trickling

23

filter for suspended matter retention

24

throttle disc

25

airspace and emergency overflow

26

straight Gap for throttled water pass

26a

V-shaped gap for throttled Water flow

27

water-impermeable material

28

exemplary water level

29

any Mud and / or thick matter source

30

Facility for pretreatment, for example for the removal of heavy metals

Claims (12)

Device for conveying sludge from a wastewater treatment plant into a dewatering and composting tank, characterized in that the supply line ( 15a ) parallel to the ground ( 10 ) of the drainage and composting container ( 5 ) and / or over the upper edge of the dewatering and composting tank ( 5 ), without the container bottom ( 10 ) to sever. Apparatus according to claim 1, characterized in that a plurality of supply lines ( 15a ) into the same dewatering and composting tank ( 5 ). Device according to claim 1 or 2, characterized in that a biofilter ( 13 ) as a ventilator and ventilator of the composting process weather-protected, preferably underground on or next to the drainage and Kompostierbehälter ( 5 ) is arranged. Device according to one of claims 1 to 3, characterized in that the drainage and Kompostierbehälter ( 5 ) and / or the settling area ( 6 ) are arranged in an existing shaft, preferably a three-chamber pit. Device according to claims 1 to 3, characterized in that the drainage and Kompostierbehälter ( 5 ) and the settling area ( 6 ) are arranged side by side or offset one above the other. Apparatus according to claim 5, characterized in that an air circulation line ( 18 ) and / or a forced ventilation between the drainage and Kompostierbehälter and the Absetzbereich is arranged. Device according to one of the preceding claims, characterized in that before the expiration ( 8th ) of the residual water is a filter ( 23 ) is arranged. Device according to one of the preceding claims, characterized in that a throttle disc ( 2 - 4 ) in the process ( 8th ) of the residual water is arranged. Apparatus according to claim 8, characterized in that the throttle disc ( 24 ) a straight gap ( 26 ) or a V-shaped gap ( 26a ) and in addition at most half the cross section as an emergency overflow ( 25 ). Device according to one of the preceding claims, characterized characterized in that a device for removing unwanted Materials in the direction of flow before the supply of sludge and / or the thick matter in the drainage and composting container is arranged. Device according to one of the preceding claims, characterized in that no settling area in addition to the drainage and Kompostierbehälter ( 5 ) and the supply line for the mixture of dirty water and the sludge and / or the thick substances suspended therein opens directly into the bottom area of the dewatering and composting tank. Apparatus according to claim 1 or 2, characterized in that in at least one supply line ( 15a ) a ventilation hole ( 4 ) or an aerator is arranged.