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Method and device for purifying domestic or industrial water

An industrial and household technology, applied in chemical instruments and methods, adjustment methods of biological treatment, transportation and packaging, etc., can solve the problems of poor mineralization of sludge, poor anaerobic digestion, etc., and achieve easy dehydration and reduction of organic load. Effect

Inactive Publication Date: 2018-02-06
OREGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The poor quality of the redox potential leads inter alia to a poor mineralization of the resulting sludge and thus to a poor subsequent anaerobic digestion (if the station includes such a digester downstream)

Method used

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  • Method and device for purifying domestic or industrial water
  • Method and device for purifying domestic or industrial water
  • Method and device for purifying domestic or industrial water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0130] Big bag; Example 4: 100 g / l after 24h, 115 g / l after 7 days and 221 g / l after 1 month.

[0131] Big bag; Example 5: 144 g / l after 24 h, 154 g / l after 7 days and 459 g / l after 1 month.

[0132] Big bag; Example 4: 120g / l after 24h (while raining all night) and 402g / l after 1 month.

[0133] It is to be noted that the sludge treated with the present invention is initially liquid downstream of the bioreactor and after passing through the reactor is arranged to have a MS concentration of 4 to 12 g / l.

[0134] Up to 12g / l, theoretically no dilution is required. If the sludge is too thick upstream of the reactor, for example above 40 g / l, it can be diluted at the inlet to enable a good pumping operation of the sludge, recalling that the sludge is Organic sludge, ie for which the MO (Matière Organique, organic matter) ratio relative to the MS (Matière en Suspension, suspended matter) ratio is 65% to 85%. The term "organic substances" is understood to mean essentially phosph...

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Abstract

The present invention concerns a method and a device for the continuous purification of a domestic or industrial water stream. After passing through a biological reactor making it possible to obtain asludge comprising between 4 and 12 g / l of Dry Solids (MS), the method involves feeding a series of chambers separated by restrictions at a flow rate q, injecting air into a second chamber at a flow rate Q > q, in order to obtain an emulsion, injecting a flocculant into a third chamber, and recovering the degassed emulsion in a drain pan. The flocculated and aerated sludge floats in the top part of the pan, such that the remaining liquid centrate has a Dry Solids content of less than 100 mg / l and has a positive redox potential > 50 mV and a value greater than 100 mV relative to the redox potential of the sludge at the inlet of the chambers, and is reinjected upstream from or into the biological reactor.

Description

technical field [0001] The present invention relates to a method for the continuous purification of domestic or industrial water using a bioreactor, making it possible to obtain a thickened and dewatered organic sludge. [0002] The invention also relates to a purification plant for implementing such a method. [0003] The invention finds a particularly important (though not exclusive) application in the field of purification stations (stations d'épuration) of domestic or industrial water, where organic pollutants are extracted from the water, in particular enabling thickening and / or Significantly reduces the volume of sludge produced by the treatment. Background technique [0004] Purification stations are known which enable the discharge of water treated by bioreactors into the environment, that is to say devices which can 2 , ozone, etc.) to separate the liquid part from the solid matter (MS) while reducing the COD. [0005] Traditionally, this type of reactor also inc...

Claims

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Application Information

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IPC IPC(8): C02F3/00B01F13/02C02F3/02C02F1/24C02F11/14B01F33/40C02F11/147
CPCC02F1/24C02F3/006C02F3/02C02F2209/10C02F2209/001C02F2209/003C02F2209/03C02F2209/04C02F2203/006C02F2209/38C02F2209/40C02F2209/44C02F2303/24C02F3/1215C02F11/16C02F11/04C02F11/147B01F33/404Y02W10/37Y02W10/30Y02W10/10Y02E50/30C02F11/14
Inventor P·卡伯P·让德罗
Owner OREGE