DE2000746A1 - Process for odor-free removal of waste water and / or sludge from animal keeping, in particular breeding farms and fattening establishments, as well as system for carrying out the process - Google Patents

Description

20007AG

Essen, January 6, 1970 N 4368/14 Dr. Ha / FN

Ernst S u t t e r, Teufen / AR (Switzerland)

Process for the odor-free removal of waste water and / or sludge from animal keeping, in particular breeding farms and fattening establishments, as well as installation for implementation of the procedure

The purification or disposal of wastewater and / or sludge from animal holdings, in particular breeding farms and fattening establishments, attempts have so far been made using biological methods. In particular the use of the activated sludge process is known from the specialist literature. Since such wastewater is always much stronger are concentrated as municipal sewage, are biological purification processes always tied to aggravating technical expenses. Compared to that which is only about 200 mg / l BOD ^ value of municipal wastewater is shown by those from livestock farms, especially fattening establishments, wastewater originating from a BOD ^ -V / ert of about 20,000 mg / l, which can only be degraded if the scrap water must be diluted to 10 to 20 times beforehand. With a BODc value of approx. 1000 mg / l, the systems in question are for biological treatment of the wastewater in a correspondingly larger: scale. Except for the 10 to 20 times enlarged construction volume the operating costs, for example the energy consumption for ventilation, are increased so much at the same time, that the previously used methods of wastewater treatment su a serious economic burden for animal husbandry became.

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In addition, cc eich c.u. £ crdc ^ irrzcr vicder has shown that in the practice of wastewater eology at times comes to a standstill and can therefore not be operated crrucly for a long time, The reason for this can be seen in the fact that in the Stables from time to time disinfections are carried out must * The means used here get into the processes and then of course bring the wastewater biology to Succumb.

For this reason too, the water authorities and in The experts in all countries created a considerable reserve against the establishment of larger livestock farmers. the Wastewater has gradually become an obstacle to the construction and operation of large operations of this kind.

In addition, the known processes for cleaning or Removal of drains and / or pits from livestock facilities an unpleasant smell, which is a practically intolerable nuisance in the vicinity of such cleaning systems living people means.

The purpose of the invention is to eliminate the disadvantages outlined above and to add a method and a system create, with which this sewage and / or sludge are completely eliminated, with the formation during the process bad smells should preferably be avoided,

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This object is achieved by a method for odorless Removal of sewage and / or sludge from livestock farms, in particular nurseries and fattening establishments, which is characterized in that the waste water and / or sludge first in an evaporation device with ventilation and Turbulate to be thickened into a thick sludge that Then it is dried in a drying oven by means of hot gases, after which the dried sleeping particles are removed from the drying oven leaving gas stream are excreted.

The wastewater and / or sludge are expediently before homogenized during processing, preferably by removing them from a collecting basin via a crushing device provided pump pumps out.

The ventilation and Turbulierung of effluents and / or sludges should be as intensive as possible, as this on the one hand supported and on the other hand the evaporation odor formation is avoided Λ. Aeration and turbulation can now be carried out in a number of ways. The waste water and / or sludge are preferably atomized by means of a gyroscope which is arranged in an evaporation tank. At the same time, the waste water and / or sludge are kept moving intensively in the evaporation tank, so that heavy sludge particles can be prevented from settling. However, it is also possible to equip the evaporation device with an evaporation container which ventilates by means of at least one ialette roller

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vird. ] 'ir. such, r "Vh" ?. ' ^ rk ^ rn Jajci open odor If necessary £ UGh ^ er „ο! .Io ■ · :::; κ :: so ir-, ν · ο "· β1 n: m in the second case zv / ecknäßiger-V'ice? ir .. C-cbl \ se voroi: .ht, dna ^ r-nü ^ L'nd air through the Vordunr!; i; r. {ji''be: i'ilt:; r bVi "', Ovler νοΐ ·, τα ^'. ''. / ·: -ϊοθ sucks. Ea is also uö ^ -lic "· ',.! Ie Abv.'ilsscr inid / or Gcjil'iiune by means of an injector to b: air.

The pre-action of the VJaGscre can be increased significantly if aan heats up the dumbbells and / or sleepers. For this you can use the ΛίΛ / Χχ'.ηο of the drying oven, preferably icsoen exhaust gases. Si <- ': <örin' ~ n ".her o.lc-r led through the hate to be evaporated \ /« r> !: n. Tn jrwoitcn trap ": uses isan as a precautionary measure, lic inr / ivho. lb DGB Viirdurustungsbeh ^ lter laid eind. Especially jr -.- eolm "ißij it is eic Abv / ^r lnsor and / or üchltiixae by Zultritcn the exhaust gases of the drying oven in the injector to ventilate \ Iva" i'ifzuli3izon. The method is particularly effective if na: a gyro and an injector are combined, v / obei nan the ab \. ''^; .os ~ r and / or r3chl'i; i '.: c- leads the evaporation blocko in the course of the injection through the injector.

Ur: a Schruir.-blldung in each Verfalirensstufen to ver aeiden it int 3weckirü.3ig if you nit wastewater and / or sludge an anti-foaming agent is added.

"Za can possibly also be useful, the wastewater and / or SchläoEc reit additives for the absorption of odor-forming organ!

chemical substances to be provided.

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The thickened sludge is preferably put in the drying oven sprayed in such a way that it dries in flight. Particularly useful it is when the sludge is placed on a carrier substance, preferably in a circuit, before it is sprayed into the drying oven applied, already dry sludge particles.

Ausl'ührungsbeispiele the subject matter of the invention and for the system according to the invention are described below with reference to the drawings described in more detail; For the sake of simplicity, the term "sludge" is used primarily, although wastewater is just as good can be treated. Show it:

Pig. 1 the first part of an embodiment of the invention System with the evaporation device;

Fig. 2 shows the second part of the same system, the drying oven contains;

Fig. 3 shows a Ausführungsfona of the system with a heated one

Evaporation tank; ™

4 shows an embodiment of the system with an evaporation container and an injector combined with this;

5 also shows a further embodiment with an evaporation container and an injector combined with this;

Fig. 6 shows another embodiment with a closed one Evaporation tank, in dom a pallet roller for

Ventilation and turbulation is arranged. 00984 2/1577

As can be seen from Fig. 1, the coming from the stable 1 are Waste water summarized in a collecting channel 2 and a Collection basin 3 delivered. From here, waste water and sludge reach the evaporation device 5 via a pump 4 If the sewage sludge is to be comminuted as finely as possible and processed further in a homogenized manner, the pump 4 is preferred equipped with a crushing device.

The evaporation device has an evaporation container in which a ventilation and turbulation device is used Gyro 7, for example a simplex gyro, is provided. The same effect is also with similar bodies that in of wastewater technology are in use. The choice between the one of such ventilating and turbulating devices will have to be met according to the technical expediency and its economic efficiency.

As a result of the intensive ventilation, the fermentative (anaerobic) degradation, which begins rapidly in the evaporation device 5, occurs prevented. The latter would lead to strong odor nuisance and must be made impossible by ventilation. this not only applies to ventilation and turbulation in the evaporation system, but also for the processes described below.

It is now also advisable that, for the same reason mentioned in the previous section, it is ensured that

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that the wastewater with the sludge is taken out of the animal stalls in the freshest possible condition. In practice, there is a risk of putrefaction within the stalls or the sewerage system as a result of undesirably long storage. For this reason, part of the homogenized wastewater or the wastewater / sludge mixture is preferably used continuously to flush the channels in the stalls and to challenge the waste. This circulation of the wastewater volume of sewage sludges is like a flushing effect achieved without additional propagation. The pump 8 connected to the evaporation tank and the flushing line 9 are used for such flushing.

The evaporation container 6 ninrat in the present example Wastewater and sludge accumulation of about 10 days and is preferably always kept filled. It has been shown that this a considerable evaporation loss occurs, the extent of which depends on the weather conditions. At a reservoir Evaporation ™ can result in a content of around 180 α and a surface of 60 m be around 9 m per day in summer. Since in the present example, evaporation occurs without a temperature increase and through intensive If ventilation and turbulation are achieved, any peeling process is prevented so that the water evaporates completely odor-free will. If the content of the evaporation container 6 is raised to about 30 ° C. by one of the means to be mentioned below If heated, evaporation from a surface of 60 m can even increase to 16 r per day. It takes place in the evaporation

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h'ilte-r therefore a considerable concentration of the wastewater and / or Eggs LJchi'un ^ e, which expediently, however, only driven so far that the contents of the evaporation tank are still kept in full circulation and for subsequent drying can be pumped out without {difficulties. Read these terms \ / earth is still adhered to if the originally at approx. 98 # lying water content bic pressed down to approx. 84 $ residual water will. This means that some of the water originally present approx. 89 pounds evaporated cind. lie evaporation device eliminated eJ.30 most of the dcü contained in the sewage sludge Water.

From the evaporation device shown in Fig. 1 is the thickened Abwajüerschlaan withdrawn by means of a pump 10 and to dea in Γ1 ~. 2 shown drying oven 11 with subsequent particle separator 12 for the dried Schiar ::. iteilchen out. The thickened can be put in the drying oven Sewage sludge is not introduced directly. Rather, it is first to be applied to a support structure and to mix with it, so that a crumbly mass with a relatively large surface area arises. Can be used as carrier substances absorbent dry substances such as ash, sawdust or the like can be used. In this example are preferably already drenched slurry particles branched off at the particle separator 12 and in the circuit as a carrier substance returned to the drying oven. The thickened sewage ■ 3erschlaiiL] is now fed into a mixing screw 13, in '

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which he circulated with the already dried ones Slurry particles are mixed. Via a feeder the crumbly mass is introduced into the drying oven 11, which is designed as a rotary kiln.

The rotary kiln is heated with oil, the hot flame gases passing through the furnace, while crumbly mass is continuously introduced from the side. As a result of the high flame speed, the flame gases immediately carry the moist sludge with them and dry it on the fly. The Schlamia mass introduced must not adhere to the walls of the rotary kiln, since such a process leads to partial burns, which in turn would generate considerable odor nuisance. To avoid this undesirable effect, the above-mentioned mixing of the thickened wastewater oils with the carrier substances is necessary. Diec would not dor Lall, were not co NIIT carrier substances provided thickened Abv / asserschlaiaiateil- ά chen a have too low a surface to completely evaporate during momentary passage through the rotary kiln. As a result of their severity, they would also increase the risk of touching the wall in the furnace and, in turn, cause the organic matter to decompose and give off a foul odor.

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The exhaust gases mixed with the dried sludge particles are now led to the particle separator 12, which acts as a cyclone is trained. This is where the dried sludge particles are separated from the exhaust gases. Part of the dry goods is now bagged and can be sold as a finished fertilizer, while another part of the dry material is in circulation is returned to the drying oven and serves as a carrier substance for the fresh, thickened sewage sludge, as mentioned above. For this purpose, the dry material is removed from the particle separator 12 by means of a conveying device 15 in conveyed a silo 16, as shown in FIG. On the one hand, the dry material is bagged from this silo as mentioned and on the other hand returned to the drying oven in the circuit.

The thickened sewage sludge mixed with the carrier substance must not be temporarily stored, since the initially crumbly mass would then bake together and there would no longer be any individual crumbs with a relatively large surface inside the drying oven. It may only be as much thickened sewage sludge quantity are mixed with a carrier substance, therefore, always, on how to promote further and instantaneously in, drying oven.

The flame gases decrease due to the evaporation of water within of the drying oven designed as a rotary kiln their temperature so far that the exhaust gas from the cyclone designed

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Particle separator only exits at around 180 ° C. The water vapor condenses immediately upon exiting the cyclone. Residual, already dried sewage sludge particles are carried away in it, re-moistened and in the in the immediate vicinity of the plant. Unwanted odors are the result. To avoid the same, the exhaust gas is preferably cleaned or washed. The cooling of the exhaust gases that takes place in this doorway can are used for this purpose, which are located in the evaporation device to heat existing waste water and sludge mix. Such configurations of the drying systems are shown in FIGS. 3 to 6 shown.

In the exemplary embodiment in FIG. 3, the exhaust gases emerging from the particle separator formed as a cyclone are removed guided via a line 17 to a cooling coil 18 in the evaporation container 6, with a downstream fan 19 provides the necessary gas flow in the line 17 and in the cooling coil 18. That which forms in the cooling coil 18 Condensate is drawn off via the line 20 and can be fed back to the evaporation container 6 by means of a pump 21 will. But since the condensation water in the Hegel is so little organic residue, it can be harmless can also be drained into a suitable receiving water. It can also be sent to a normal, for example communal, sewage treatment plant be discharged.

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V, ie lit: 4 shows, the hot exhaust gases can be drawn through an injector 22, the energy of the exhaust gases being transferred to the injector water and the cleaning of the exhaust gases being effected. Las Injektorwaaser will be recycled and the Ver-QuiiHtungajeh within this cycle zar indirect ^heating: ilters used. For this purpose, the injector water is released into a basin 23, a ^: d ^ - ::. it via a pump 24 »a heating ^{line 25» arranged in Veruunstungsbeh:} il ->, er 6 »to the injector 22 zurLickg.?f-hi-; will. As a result of the condensation from ζ ex A'jgaü increases caa circulation νolucen des Injektor- \: ar-3 (. 'Rs and :: ui proportionally via a line 26 into the Verdun-Htur. ^^ bch'ilt ^ r or, which is even more economical, can be diverted into a suitable receiving water or in sewage systems.

Ler injector t'asoerkreislauf kanii zurbesseren absorption of odor-causing organic substances with chemicals added weräer .. ^ a geruchbiluenden the substances are always slightly alkaline, is £ I a eshwache acidification of the home

je'iCtoi "v. ^r assers ^ i- sulfuric acid, as well as additives such as glycerine, glycol uüu ^: Ii.nlic; .e ί Ur the binding of the odor- forming der.dtfn ^ u L ε dance confusion

As the exemplary embodiment of FIG. 5 shows, such an injector 22 can directly nit wastewater / Schlania mixture of Ver dunstungsbeh-'l ^ ers 6 are acted upon. Ls thus occurs

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Immediate Lrv / än: rank and distribution of the wastewater in 7evaporator 6 a. For this purpose, the outlet opening of the inlet port 22 opens directly via the CLc-rflriehc d; j 3eli ' ^: iterhaltes des evaporation container 6. At the same time, the waste water drainage tank 6 is withdrawn from the 7c-evaporation container 6 via a point 27 and fed to the injector 22 vic-the. In the development of the drying system, g3j: Ü xig. 5 not only results in eii. particularly simple structure of the Anlago, but in addition the results from Cc -: ^ In ^ el: t: r 22 av.s- '

Exhaust gases destroy the Z) jhiunes, the sioli on the Surface of the inlialces of the evaporation tank bi.l-j.-jt.

During the turbulence and discharge of sewage and drainage, which are very white, a look forms on the surface of the contents of the waste disposal container, which can strongly affect the flow of waste. Lie 2 3hau3 * c <L since ilation in the evaporation fan -jm2 therefore aimed for. Ia the from the ^ achlitöra ^ Mr bekair-: ~ e '.lethoäe d £. -S Aufaprllli ^ iiö vd ;: d

PriachwEi £ jst-r auf deii 3chau: n -jino Verraeiirunj (Leu 3ec ': eninhaltes would mean, this stands ^{;. 1} ria3nahia3 i: i C-egen ^ atz rjd aspired Zv / ec'c der J'indiclaing asr Abv / aa3er £) 0ul ^r Ln_ie. lioaea known method i'jt diimnac;: 3ur schauaa first ration not suitable.

Such a Suhaura can be destroyed, for example, by the fact that warning gases act on the 3ch-iu.; E, like this in the example. 5 is ge-.ν * igt. Jer glaiehü "ffekt t / i aueli achieved when certain anti-showa-I-iitt-al in the evaporation

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stungsbehälters are continuously fed, as by the adding device 23 is indicated schematically in FIG. 5. It must be taken into account that by no means all anti-show agents are suitable for this, as they are in the evaporation process distribute proportionally between liquid and gaseous phase depending on their boiling point and therefore also evaporate can. Agents with a boiling point above 250 ° C can be used in conjunction with evaporation containers. Fatty alcohols with more than 12 C atoms, hydrocarbons with boiling ranges above 250 ° C, polyhydric alcohols such as 3. Glycerin, have proven to be an anti-foam agent proven in the present case.

In Fig. 6, a further drying system is now shown, which is particularly suitable for smaller amounts of wastewater and therefore it can be used for smaller animal keeping alone. The evaporation device 5 has a closed one in this space Evaporation container 6, in which a pallet roller 29 is arranged, which for a vortex and Provides ventilation of the sewage sludge. The latter is on a Side of the evaporation tank fed through line 30, and the thickened sewage sludge is by means of the pump 10 on removed from the other side of the device and Drying oven further promoted. At the upper end of the closed evaporation container 6, a fan 19 is arranged, the on the one hand fresh air and on the other hand from the cyclone 12 serving as a particle separator stamaende exhaust gases through the upper one Part of the container pulls. At the stage in which the drying oven

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does not work, fresh air is drawn through the top of the canister. In the times when the When the drying oven is in operation, hot exhaust gases are drawn through the upper part of the container - soirit alternate Phases of ventilation and heating of the sewer line into evaporation tank. Also in this example you can the sewage sludge is mixed with an anti-daze agent be.

The exemplary embodiments shown already demonstrate very clearly what advantage the drying system according to the invention offers. A comparison with other drying systems according to the prior art shows that for elimination Clay 1000 liters of water from skis inside about 100 liters Light heating oil can be used as a source of energy. On the other hand, the lying drying device can sit 60 1 heating oil per 1000 liters of wastewater to be disposed of. This extraordinary economy is primarily achieved by the fact that the main part is already in the evaporation tank of the water is removed and the Rauehgaswänse for heating of the contents of the evaporation container is used by v.iri.

The dry material resulting from the drying of the sludge is with 60 to 80 Jf organic content and the content of phosphorus, potash, lime and nitrogen both as common agricultural fertilizer and for ^? ir special purpose

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sot ^ bar. Mose's way of utilizing the end products of the present Process increase its economy considerably.

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Claims (1)

_ 17 - 200074G Claims M ^ / Process for the odor-free removal of wastewater and / or Sludge from animal keeping, in particular breeding farms and Fattening establishments, characterized in that the waste water and / or sludge are initially placed in an evaporation device Aeration and turbulation are used to thicken a thick sludge, which is then thickened in a drying oven by means of hot Ga3e is dried, whereupon the dried sludge particles from " be separated from the gas stream leaving the drying oven. 2. The method according to claim 1, characterized in that the wastewater and / or the sludge before processing homogenized, inden you from a collecting tank over a pump equipped with a shredding device. 3. The method according to claims 1 and 2, characterized in that the waste water and / or the Schlvünme aerated and turbulated by ä atomization by means of a gyroscope. 4. The method according to claims 1 and 2, characterized in that that the wastewater and / or the sludge in an evaporation tank by means of at least one pallet roller ventilated and turbulent. i>. Method according to claims 1 and 2, characterized in that that the wastewater and / or the sludge is aerated and turbulated by means of an injector. 009842/1577 BAD ORIGiNAL 200074G 6. Ancestors according to claims 1 to 5 »characterized in that that nan the sewage and / or the sludge to evaporate heats up. 7. The method according to claim 6, characterized in that the wastewater and / or the sludge using the waste heat of the Drying oven, preferably by means of its exhaust gases, heats up. ^ 8. The method according to claims 5 and 7, characterized in that that the Abviisser and / or the Schlärane through Feeding the exhaust gases from the drying oven into the injector is ventilated and heated at the same time, with: nan optionally the injector in combination ::: lt uses a gyro. 9. The method according to claims 1 to G, characterized in that that nan sprayed the thick sludge into the drying oven and i:; i flight dries. ' ™ 10. The method according to claim 9, characterized in that get the thick slurry before spraying it in the drying oven on a carrier substance, preferably on alreadyAryrockene Schlamptcilchen circulated, and that one as Drying oven uses a horizontal rotary kiln. ' 11. The method according to claims 1 to 10, characterized in that that the sewage and / or the sludge Antischaus-Hittel and / or absorbents to bind odor-forming adding organic substances. 009842/1 577 _BAD ORIGINAL 200074G 12- Plant for carrying out the method according to the claims 1 to 11, characterized in that one with an aeration and turbulating device (7; · 22; 29) provided evaporation device (5) and a downstream device Has drying oven (11) with subsequent particle separator (12). 13. Plant according to claim 12, characterized in that it comprises a serving as Hoiaogenislerungaeinrichtung in a similar waste water and / or Schlaian-Sanmelbecken (3) arranged and provided with a crushing device pump (4). 14. Plant according to claims 12 and 13 _t characterized in that the evaporation device (5) aufweißt as ventilation and Turbuliereinrichtung an injector (22) which opens above the Schiataniveau of the evaporation container (6) and connected with this in the circulation is sov / ie for the purpose of Handling and ventilation is connected to the drying oven (11) via a line (17). 15. Systems according to claims 12 to 14, characterized in that that a conveying device (15) is arranged on the particle separator (12), which via a mixing screw (13) old of the feeding device (14) of the drying oven (11) connected is. 009842/1577 BADORiGINAL SLO e r e i t e