SI9500180A2

SI9500180A2 - Agent for biological purification of waste water and device therefor

Info

Publication number: SI9500180A2
Application number: SI9500180A
Authority: SI
Inventors: Norbert Wamser; Harald Tropper; Jochen Duerr; Klaus Wratschko
Original assignee: Naintsch Mineralwerke
Priority date: 1994-06-01
Filing date: 1995-06-01
Publication date: 1996-04-30
Also published as: DE29508947U1; AT139U1

Abstract

Izum se nanaša na zmanjšanje volumna blata ter vsebnosti celotnega dušika in fosfatov pri biološkem čiščenju odpadnih vod, kjer poživljenemu blatu dodamo minerale, kot smukec, pirofilit, kaolin in/ali sljudo, z velikostjo delcev od 3 mikro m do 100 mikro m v količinah do 2,0 g/l odpadne vode v obliki vodnih suspenzij z vsebnostjo trdnih snovi do 10 mas.%. Za pripravo suspenzij v smislu izuma uporabimo napravo, znano iz priprave gotovih ometov.The invention relates to the reduction of sludge volume and total nitrogen and phosphate content of biological sewage treatment, where the living minerals such as talc, pyrophyllite, kaolin are added to the sludge and / or mica, with a particle size of from 3 micro m to 100 micro m in quantities up to 2.0 g / l of waste water in the form aqueous suspensions containing up to 10 solids wt.%. For the preparation of suspensions according to the invention, it is used a device known from the preparation of finished renders.

Description

Naintsch Mineralwerke Gesellschaft m.b.H.Naintsch Mineralwerke Gesellschaft m.b.H.

Sredstvo in naprava za biološko čiščenje odpadnih vodWastewater treatment plant and equipment

Predloženi izum se nanaša na zmanjšanje volumna blata ter znižanje vsebnosti celotnega dušika in fosfatov pri biološkem čiščenju odpadnih vod, kjer poživljenemu blatu dodamo v določenih količinah minerale, kot smukec, pirofilit, kaolin in/ali sljudo, z definirano velikostjo delcev. Zlasti se izum nanaša na uporabo mineralov v obliki vodnih suspenzij, kot tudi na napravo za izdelavo suspenzij v smislu izuma.The present invention relates to the reduction of sludge volume and the reduction of total nitrogen and phosphate content in biological wastewater treatment, where minerals such as talc, pyrophyllite, kaolin and / or mica with defined particle size are added to the recovered sludge. In particular, the invention relates to the use of minerals in the form of aqueous suspensions, as well as to the device for making suspensions according to the invention.

Na področju biološkega čiščenja odpadnih vod je znana uporaba smukca, pirofilita, kaolina in/ali sljude zlasti za to, da vpliva na sestavo in lastnosti poživljenega blata, kot je gostota blata in sposobnost usedanja, na način, ugoden za biološko razgradnjo, in se s tem doseže izboljšana biološka razgradnja onečiščenosti odpadne vode in znižanje vsebnosti celotnega dušika in fosfatov v odtoku.In the field of biological wastewater treatment, the use of talc, pyrophyllite, kaolin and / or mica is known in particular for affecting the composition and properties of the recovered sludge, such as sludge density and settling capacity, in a biodegradable manner and this results in improved biodegradation of wastewater pollution and a reduction in the total nitrogen and phosphate content of the effluent.

Uporabljena sredstva imajo povprečno velikost zrn od 3 do 100 μτη in jih uporabijo v količinah do 2,0 g/1 odpadne vode. Lahko jih uporabijo sama, drugega za drugim ali v medsebojni zmesi. Prav tako jih lahko uporabijo po izbiri v neobdelani ali obdelani obliki, npr. kationizirana.The means used have an average grain size of 3 to 100 μτη and are used in quantities up to 2.0 g / l of wastewater. They can be used alone, one after the other or in a mixture with each other. They can also be used optionally in untreated or processed form, e.g. cationized.

Sredstva lahko dodajo tako pred predbistrilnim bazenom kot tudi direktno v bazen za poživljanje. Kot posebno ugoden se je izkazal direkten dodatek v bazen s poživljenim blatom. Mesto bistrilne naprave, na katero najugodneje dodajo sredstva za hitro zmanjšanje volumna blata, je odvisno od vsakokratne konstrukcije naprave, kot npr. prezračevalnih in prečrpovalnih naprav bistrilnih bazenov. To mesto pa lahko strokovnjak zlahka določi, če pozna napravo.The funds can be added both in front of the pre-clarification pool and directly into the recovery pool. A direct addition to the animated mud pool proved to be particularly advantageous. The location of the clarifying device to which the sludge reducing agents are most advantageous depends on the construction of the device, such as, e.g. ventilation and pumping installations for clarification pools. However, this site can easily be determined by a specialist if he / she knows the device.

V praksi dodajajo ta trdna sredstva na želenem mestu bistrilne naprave diskontinuimo s pomočjo nakladanja ali s praznjenjem transportne embalaže, kot vreč idr. Zaradi razvijanja prahu, ki se pri tem pojavlja, predstavlja ta način dodajanja tako možno prizadetost zdravja osebe, ki izvaja dodajanje, kot tudi okolja. Zaradi tega dodajanja mineralov je odvisna njihova enakomerna porazdelitev v bistrilni napravi v razmeroma kratkem časovnem obdobju v kar največji meri od prezračevalnih in prečrpovalnih naprav bistrilnih bazenov.In practice, these solids are added to the desired location of the clarifying device by discontinuity by loading or emptying the transport packaging, such as bags etc. Due to the development of dust that occurs, this way of adding presents both a potential impairment to the health of the person performing the addition and the environment. Due to this addition of minerals, their distribution in the clarifying plant over a relatively short period of time depends as much as possible on the ventilation and pumping facilities of the clarification pools.

Cilj predloženega izuma obstoji sedaj v tem, da razvijemo postopek, s katerim lahko uporabljena sredstva dodamo v bistrilno napravo enostavno in v fizikalni obliki, kijih takoj naredi primerna za izpolnitev njihovih funkcij. Nadaljnji cilj obstoji v tem, da zagotovimo postopek, ki ga lahko pri vsaki poljubni bistrilni napravi, zlasti pri manjših in srednjih bistrilnih napravah, uporabimo tudi naknadno brez posebnih procesno-tehničnih ali ekonomskih težav.The object of the present invention is now to develop a process by which the means used can be added to the clarifying device simply and in a physical form, which immediately makes it suitable for the fulfillment of their functions. A further objective is to provide a process that can be applied subsequently to any arbitrary clearing device, especially small and medium-sized clearing devices, without any specific process-technical or economic problems.

Sedaj smo presenetljivo ugotovili, da lahko uporabljena sredstva dodamo na optimalen način kot suspenzijo z vsebnostjo trdne snovi do 10 mas.%, to suspenzijo pa dobimo s pomočjo naprave, kije znana iz priprave gotovih ometov. Taka naprava je prikazana na sliki 1 in obstoji iz prednostno konično izvedenega silosa 1, ta silos 1 pa je opremljen s polnilnim vodom 2 za trdne snovi in odpraševalnim vodom 3 ter ima na svojem spodnjem koncu iztočno loputo 4, ki je neposredno priključena na z regulimim motorjem 5 opremljeno dozirno postajo 6, ki je povezana preko s pokrovom 7 opremljene, prav tako prednostno konično izvedene posode 8 z mešalno postajo 9, kamor se izteka vod 10 za vodo in iz katere vodi s črpalko 11 opremljen vod za odvajanje dobljene suspenzije.We have now surprisingly found that the agents used can be optimally added as a suspension with a solids content of up to 10% by weight, and this suspension is obtained using a device known from the preparation of finished plasters. Such a device is shown in Figure 1 and consists of a preferably tapered silo 1, and this silo 1 is provided with a solids feed line 2 and a discharge line 3 and has at its lower end an outlet flap 4 directly connected to the control engine 5 equipped with a dosing station 6 connected via a lid 7 to a container, also preferably conical, in a container 8 with a mixing station 9, to which a water conduit 10 flows out, and from which a conduit for draining the resulting suspension is supplied with a pump 11.

Kot že preje omenjeno je taka naprava znana iz priprave gotovih ometov. Vendar gre pri gotovih ometih za suspenzije z bistveno višjo vsebnostjo trdne snovi okoli 50 do 70 mas.%, tako da primernost kake naprave, znane z drugega tehničnega področja in prirejene za bistveno višje vsebnosti trdnih snovi, za pripravo suspenzij v smislu izuma, ki imajo majhno vsebnost trdnih snovi, nikakor ni bila očitna. Slednje poleg tega pripravimo smotrno s tehnično vodo, medtem ko za pripravo gotovih ometov samoumevno uporabijo le svežo vodo.As mentioned above, such a device is known from the preparation of finished renders. However, ready-made plasters are suspensions with a substantially higher solids content of about 50 to 70% by weight, such that the suitability of any device known in the art and adapted to significantly higher solids content for the preparation of suspensions of the invention having low solids content was by no means obvious. In addition, the latter are prepared with technical water, while for the preparation of finished renders they only use fresh water.

Kot silos 1 lahko uporabimo običajne silose s kapaciteto do 100 m³. Tam skladiščeni minerali ali zmesi mineralov v praškasti obliki pridejo preko na spodnjem koncu silosa predvidene iztočne lopute 4 v dozirno postajo 6. Doziranje krmili regulimi motor 5. Preko nadaljnje posode 8, ki se jo da zapreti in in ki je prav tako konično izvedena, pridejo le-ti končno v mešalno postajo 9, kjer se pomešajo z vodo, ki jo dovajamo preko voda 10, s pomočjo npr. polža (ni prikazano). Črpalka 11 transportira tako dobljene suspenzije končno v vod, ki vodi v bistrilno napravo, iz katerega lahko doziramo suspenzije na želenem mestu. Mešalno postajo lahko po potrebi segrevamo.Normal silos with a capacity of up to 100 m ³ can be used as silo 1. The stored minerals or mineral powder mixtures there enter the metering station 6 at the lower end of the silo provided at the lower end of the silo. they are finally added to the mixing station 9, where they are mixed with the water supplied through the conduit 10 by means of e.g. snails (not shown). Pump 11 transports the suspensions thus obtained finally into a conduit leading to a clarifying device from which suspensions can be dosed at the desired location. The mixing station can be heated as needed.

V smislu izuma dosežemo tako bolj učinkovito uporabo mineralov, ki jih lahko poleg tega dodajamo enakomerno daljše časovno obdobje, pri čemer obdržimo znane prednosti uporabe mineralov, kot smukca, pirofilita, kaolina in sljude, pri biološkem čiščenju odpadnih vod.According to the invention, the more efficient use of minerals is achieved, which in addition can be added for an even longer period of time, while maintaining the known advantages of using minerals such as talc, pyrophyllite, kaolin and mica in the biological treatment of wastewater.

Claims

PATENT APPLICATIONS

1. Agents for reducing sludge volume and reducing total nitrogen and phosphate content in biological wastewater treatment, characterized in that they are aqueous suspensions containing up to 10% by weight of minerals such as talc, pyrophyllite, kaolin and / or mica , with a particle size of 3 μτη to 100 μτη.

2. Use of aqueous suspensions containing solids of up to 10% by weight of minerals such as talc, pyrophite, kaolin and / or mica, with a particle size of 3 μτη to 100 μτη, as an additive for invigorated sludge for biological treatment of wastewater to reduce sludge volume and reducing the total nitrogen and phosphate content of the effluent.

3. A device consisting of a preferably conical silo (1), and this silo (1) is provided with a solids feed line (2) and a dust line (3) and has a discharge flap (4) at its lower end, directly connected to a dosing station (6) equipped with a regulated motor (5), which is connected via a lid (7) to a convexly designed conical container (8) with a mixing station (9) to which the water ( 10) for water and from which a pump (11) is equipped with a conduit for draining the resulting suspension, characterized in that it can be used for the preparation of aqueous suspensions with a solids content of up to 10% by weight, with solids being minerals such as talc, pyrophyllite, kaolin and / or mica, with a particle size of 3 μτη to 100 μτη.