Method and device for purifying liquid effluents
A discharge and liquid technology, which is applied to the purification device of liquid discharge, and the discharge field with a very high initial DCO [], can solve the problems of unsatisfied demand, unreachable effect, and unreachable discharge substance content, etc., to achieve Simplify the effect of biological decontamination treatment
Inactive Publication Date: 2013-11-27
OREGE
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Problems solved by technology
[0021] As a result, the prescribed levels of substances discharged into the natural environment are often not achieved today, requiring dilution of the discharge with purified water before discharge
This dilution operation, besides being usually illegal, is not satisfactory in itself, requiring expensive pumps and recirculation devices, without quantitatively changing the discharge volume of harmful emissions
[0022] Furthermore, traditional processes are powerless, especially for emissions that have only recently emerged
[0023] Therefore, efficient, versatile, compact and non-polluting methods for purifying liquid discharges have long been desired, yet the need remains unmet
Method used
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Embodiment
[0167] It has been found that dextrins, especially cyclodextrins (dextrins arranged in conical rings) molecules are produced during the operation of the purification station. The structure is bioresistant, very soluble and easily diffused. In traditional treatment methods, the plasticization of organic matter will only be amplified, and the purpose is to suppress it.
[0168] This phenomenon renders the product non-biodegradable and its DCO appears to be insoluble, approximately 1000 mg / l (plus or minus 300 mg / l).
[0169] Excellent results corresponding to Tables I-V (series 1-5) were obtained with the device of the present invention having four water-filled chambers.
[0170] The industrial treatment of emissions takes 1-2m 3 / h flow, the total volume of the box is 5.5m 3 , the velocity of the recirculation (that is, circulation) is 60m 3 / h.
[0171] The oxidation system is an electrolytic type system as previously described, which operates on said circulation.
[017...
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The invention relates to a method and a device for purifying liquid effluents, in which water is separated from substances by performing, in a single vertical enclosure (3), a vertical bubbling in the effluents fed at a flow rate d. The enclosure has a free surface and includes at least two compartments (4, 5, 6, 7) communicating together for enabling a circulation between the compartments successively from the top to the bottom and from the bottom to the top between the lower portion thereof and a medium level at a flow rate D at least three times higher than the flow rate d. The supernatant phase is continuously discharged and a hydraulic or gaseous chemical oxidation of said effluents is simultaneously carried out in the same enclosure, the chemical oxidation rate and the bubble flow rate and size being selected in order to progressively obtain a separation of the solid / liquid and liquid / liquid phases at the surface of the enclosure for obtaining a COD below a predetermined threshold.
Description
technical field [0001] The present invention relates to a process for the purification of liquid effluents containing dissolved or undissolved organic and / or inorganic substances by reducing them below a given DCO and / or DBO by means of intensive hydraulic agitation, oxidation and skimming operations . [0002] The present invention can also reduce the content of COT (total carbon) and MES (suspended solids) below a given threshold. [0003] The invention also relates to a cleaning device for such liquid discharges. [0004] The invention is especially but not exclusively applicable in the field of purification of petroleum effluents or effluents from the manufacture of agricultural products, especially where the initial DCO is very high [(>30,000mg O 2 / l or mg / l, the latter expression is often used below)], in which the carbon chain is long and forms a ring, which means it is difficult to be degraded. The present invention also allows, for example, to treat polluting e...
Claims
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IPC IPC(8): C02F1/72
CPCC02F2101/32C02F3/06C02F1/72C02F1/78C02F2301/024C02F1/4672C02F1/74C02F1/008C02F1/24C02F1/722Y02W10/10
Inventor P·卡波M·洛佩茨P·让德罗
Owner OREGE