DE333703C - Process for rendering the waste water from gas works and chrome leather factories harmless - Google Patents

Process for rendering the waste water from gas works and chrome leather factories harmless

Info

Publication number
DE333703C
DE333703C DE1919333703D DE333703DD DE333703C DE 333703 C DE333703 C DE 333703C DE 1919333703 D DE1919333703 D DE 1919333703D DE 333703D D DE333703D D DE 333703DD DE 333703 C DE333703 C DE 333703C
Authority
DE
Germany
Prior art keywords
waste water
chrome leather
rendering
harmless
gas works
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE1919333703D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CARL BOZENHARDT DR
Original Assignee
CARL BOZENHARDT DR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CARL BOZENHARDT DR filed Critical CARL BOZENHARDT DR
Application granted granted Critical
Publication of DE333703C publication Critical patent/DE333703C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/22Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
    • C02F2103/24Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Description

Verfahren zum Unschädlichmachen der Abwässer der Gaswerke und der Chromlederfabriken. Die Erfindung betrifft ein besonders einfaches und wirksames Verfahren zum Unschädlichmachen von Abwässern der Gaswerke und der Chromlederfabriken.Process for rendering the waste water from the gas works and the Chrome leather factories. The invention relates to a particularly simple and effective one Process for rendering waste water from gas works and chrome leather factories harmless.

Zum Verständnis des Wesens und der Bedeutung der Erfindung möge nacheinander auf diese zwei Abwässer näher eingegangen werden.To understand the essence and meaning of the invention may successively these two wastewaters will be discussed in more detail.

Seit der Entdeckung und der wirtschaftlichen Ausnutzung der Darstellung des Ammoniaks aus der Luft ist die Aufarbeitung des Ammoniakwassers in kleinen und mittleren Gaswerken unwirtschaftlich geworden, besonders mit Rücksicht auf die bedeutenden Kosten, welche die hierzu notwendigen Apparate erfordern. So sind solche kleinen und mittleren Gaswerke vielfach gezwungen, die Gaswässer in die Flußläufe einlaufen zu lassen.Since the discovery and commercial exploitation of the representation the ammonia from the air is the processing of the ammonia water in small and medium-sized gas works have become uneconomical, especially with regard to the important ones Costs that the equipment required for this requires. Such are those little ones and medium-sized gas works are often forced to run the gas waters into the rivers allow.

Dem stellen sich aber Schwierigkeiten aller Art entgegen. Die Behörden verlangen Reinigung derAbwässer, und die Fischereiberechtigten werden durch das Ablassen des Gaswassers in die Flüsse geschädigt.However, there are difficulties of all kinds against this. The authorities demand purification of the sewage, and the fishing rights are through the Discharge of the gas water into the rivers damaged.

Ähnlich verhält es sich bei Chromlederfabriken. Die in solchen Betrieben anfallenden, sauer reagierenden Chromabwässer benötigen, ehe sie den Flußläufen zugeführt werden, eine Reinigung, die darin besteht, daß sie bis zur neutralen oder schwach alkalischen Reaktion abgestumpft werden.The situation is similar with chrome leather factories. The ones in such establishments Accruing, acidic reacting chromium wastewater need before they enter the rivers a purification, which consists in bringing them to neutral or weak alkaline reaction will be blunted.

Während die Gaswerke zum Herausziehen des Ammoniaks aus den Gaswässern teure Anlagen benötigen, brauchen die ChromIederfabriken bisher zum Abstumpfen ihrer Abwässer verhältnismäßig große Mengen von Soda, deren Preis die Wirtschaftlichkeit der Chromlederfabriken ganz bedeutend herabdrückt.While the gas works to extract the ammonia from the gas waters The chrome leather factories used to need expensive systems to dull them Wastewater relatively large amounts of soda, the price of which is cost-effective of the chrome leather factories.

Gemäß der Erfindung wird nun allen diesen Übelständen dadurch abgeholfen, daß das ammoniakhaltige Abwasser von Gasanstalten mit Chromoxydsalze enthaltendem Abwasser von Chromlederfabriken zur Wiedergewinnung von Chromox3rdhy drat vermischt wird, so daß dabei das Ammoniak gebunden und in wesentlich veränderter und unschädlicher Form in die Flußläufe eingeführt wird, während die ausgebrauchten Chromgerbbrühen gleichzeitig abgestumpft werden, also sowohl die Kosten für die Beseitigung des Ammoniaks der Gaswässer als auch die Ausfällungskosten bei den Chromgerbbrühen mit einem besonderen Fällungsmittel (z. B. Soda) erspart werden.According to the invention, all these inconveniences are now remedied by that the ammonia-containing waste water from gas stations with chromium oxide salts Waste water from chrome leather factories mixed to recover chromium oxide is, so that the ammonia is bound and significantly changed and harmless Form is introduced into the rivers while the used chrome tanning liquor at the same time be dulled, so both the cost of eliminating the Ammonia of the gas water as well as the precipitation costs in the chrome tanning liquor a special precipitant (e.g. soda) can be saved.

Die Wiedergewinnung von Chromoxydhy drat ist ein wichtiger Fortschritt gegenüber dem schon bekannten Verfahren, bei dem die Abwässer der Chromlederfabriken mit den alkalischen Äscherbrühen derselben. Betriebe zusammengebracht werden, welches aber diese Wiedergewinnung mindestens nicht in der Weise erlaubt, daß (las Chromoxydhydrat ohne weitere Behandlung wieder in den Betrieb kommen kann.The recovery of chromium oxide is an important advance compared to the already known process in which the waste water from the chrome leather factories with the alkaline liming broths of the same. Plants are matched whichever but this recovery at least not in such a way that (read chromium oxide hydrate can come back into operation without further treatment.

Wichtig ist auch, daß der aus den Schwefelverbindungen des Gaswassers bei der Fällung des Chromoxydhydrats nebenbei entstehende fein verteilte Schwefel bei Wiederbenutzung des Chromoxydhydrats bei der Herstellung von Chromleder eine sehr günstige Wirkung auf die_ Zartheit des Narbens Destillieren der Ammoniakwässer über Kalk zwecks Konzentration erspart.It is also important that the finely divided sulfur which is also produced from the sulfur compounds of the gas water during the precipitation of the chromium oxide hydrate has a very beneficial effect on the delicacy of the grain when the chromium oxide hydrate is reused in the manufacture of chrome leather No need to distill the ammonia water over lime for the purpose of concentration.

So werden eine große Reihe hygienischer und wirtschaftlicher Vorteile dadurch erreicht, daß anstatt der bisher gebräuchlichen Einzelbehandlung dieser von verschiedenen Betrieben kommenden Abwässer beide zusammengeführt werden.This creates a wide range of hygienic and economic benefits achieved in that instead of the previously common individual treatment of this Wastewater coming from different companies will both be merged.

Claims (1)

PATENT-ANSPRUCH: Verfahren zum Unschädliehmachen von Abwässern der Gaswerke und der Chromlederfabriken, dadurch gekennzeichnet, daß Ammoniak enthaltendes Abwasser von Gaswerken. mit Chromoxydsalze enthaltendem Abwasser von Chromlederfabriken zur Wiedergewinnung von Chromoxydhydrat vermischt wird.PATENT CLAIM: Process for rendering waste water harmless from the Gas works and the chrome leather factories, characterized in that ammonia-containing Sewage from gas works. with waste water from chrome leather factories containing chromium oxide salts is mixed to recover chromium oxide hydrate.
DE1919333703D 1919-03-14 1919-03-14 Process for rendering the waste water from gas works and chrome leather factories harmless Expired DE333703C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE333703T 1919-03-14

Publications (1)

Publication Number Publication Date
DE333703C true DE333703C (en) 1921-03-03

Family

ID=6211583

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1919333703D Expired DE333703C (en) 1919-03-14 1919-03-14 Process for rendering the waste water from gas works and chrome leather factories harmless

Country Status (1)

Country Link
DE (1) DE333703C (en)

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