FR2876289A1 - Malodorous gas emission treatment from wastewater plants comprises applying ambias-19 to the effluent gas by pulverization, nebulization or atomization and without solvent addition - Google Patents

Abstract

The effluent gas to be treated is without preferred conditions of temperature, pressure or volume. The ambias-19 is distinguished by its qualities and adsorbents, depends upon the nature of the effluent and the treatment is done by adabsorption technique.

Description

BBK PROCESS

  I / Introduction Smelly emissions generated by sewage treatment plants pose a major public health problem as a result of their spread into the surrounding atmosphere, resulting in a state of gene and harmfulness to the neighboring population in addition to the personnel .

  Therefore, the decontamination of this atmosphere becomes a priority action to neutralize smelly gas emissions and preserve the health of the population.

  For this, several deodorization techniques were developed but their application did not lead to satisfactory results. It thus becomes urgent to develop a more efficient deodorization technique.

  Indeed, deodorization techniques of the gaseous effluent can be classified into two categories.

  Preventative techniques of treating the liquid effluent before the formation of smelly emissions. These are the most sought after techniques.

  - Curative techniques applying directly or indirectly to the gaseous effluent after its formation upstream or downstream of its release into the surrounding atmosphere. These are difficult techniques to implement, requiring complex management and presenting a more or less uncertain performance.

  These two types of techniques, preventive and curative, can be physical, chemical, biological, or combined techniques; in particular: 2876289 É thermal or catalytic incineration: É adsorption É Masking É Absorption É Bio-wash or biofiltration II / Atmospheric purification 1 / The smell The smell, whether pleasant or no, is analyzed by the olfactory system whose receptors are in the nasal cavity. Invisible and penetrating, A o - it leads the individual to search for the source, the origin of the stimulus and the resulting sensation (especially in the case of a malodorous effluent); indeed an odor is always associated with the image of its source.

  The perception of a bad smell induces almost generally in search of its mechanism of action.

  The olfactory gene only concerns malodorous volatile compounds which, by exceeding their just perceptible threshold in the infected atmosphere, begin to harm the vital environment of the surrounding environment.

  2 / Sources of unpleasant odors Wastewater is usually loaded with particular organic matter (elemental or associated) or dissolved. The malodorous volatile compounds may result from biological fermentations of nitrogenous or phosphorus compounds which are triggered in a reducing medium, as they may occur following the initial loading of industrial liquid effluents with highly volatile compounds. These products may be previously used or formed during production processes; in particular, sulphides (Harkness, 1980), aldehydes, alcohols (Brandl and Stover, 1988) or ammonia often present in certain industrial discharges.

  2876289 Conclusion Due to the great diversity of malodorous constituents used in the gas emissions from WWTPs, we recommend to give top priority for the treatment of sulfur compounds for the following reasons: They are the most frequent in the networks sanitation and WWTP (Sewage Treatment Plant) and are the most smelly.

  They have the lowest perception thresholds.

  They are indisputably the most harmful compounds presenting the most pronounced risks on human health These are compounds that present major risks on sanitation equipment and WWTP installations.

  3 / The problem It should be noted that almost all the techniques, used for the treatment of smelly emissions, proved their failures either in terms of cost, performance, displacement or generation of a new pollution.

  As a result, the trend towards serious research for the development of another treatment technique, smelly emissions, is becoming a top priority.

  This technique must have the advantage of being inexpensive, easy to install, maintain and manage and especially well appreciated by the surrounding environment (as being non-polluting or generating a non-annoying pollution, easy to manage , treatable, or even rewarding). Hence the birth of the formulation idea of the AMBLAS 19 while aiming to circumvent the failures generated during the application of conventional modes of treatment.

  - 2876289 III / BBK processes (Atmospheric purification by adabsorption The resolution of a problem of olfactory nuisance by the application of a single deodorization technique is a difficult operation.

  The combination of two or more techniques is presented as the most certain solution for the elimination of targeted nuisances; unfortunately the excessive cost of installation and maintenance work against the maintenance of this choice.

  Therefore, the process which can provide an inexpensive and efficient combination will have considerable success.

  4c Indeed, the BBK process provides the combination of the two usual techniques: absorption and adsorption.

  This technique may be called later: adabsorption 1Presentation of the BBK process The BBK process is an atmospheric decontamination process (purification A S _ of gaseous effluents) by elimination of certain malodorous gaseous compounds of domestic, agricultural or industrial origin.

  This process acts by application of Ambias - 19 (chemical formulation) directly on the gaseous effluent as soon as it is degassed or after it has been collected at the level of polluting sources or sites.

  - Ambias - 19 acts on the main constituents of the gaseous effluent concerned (sulfur compounds, nitrogen compounds or volatile organic compounds) to transform a large proportion into harmful compounds and to capture other species to prevent their spread.

  Ambias - 19 provides the two functions of absorption (chemical reaction) with certain compounds and adsorption (physical reaction) with other types of compounds contained in the targeted gaseous effluent.

  2- Technical description of the BBK process

  Ambias - 19 has the advantage of being absorbent with respect to certain gaseous compounds and its adsorbent qualities towards other constituents of the effluent exposed to the treatment.

  Technical Sheet AMBIAS -19 Deodorizing disinfectant neutralizer

Description:

  AMBIAS 19 is a product designed for ambient treatment in the food industry and atmospheric purification.

  Physico-chemical characteristics - Presentation: liquid.

  - pH: slightly acidic - Miscibility: partially miscible in water. perfectly miscible in alcohol.

  Application: AMBIAS 19 can be applied: - Nebulization.

- Spraying.

  - Atomization in the concerned atmosphere.

- Sebkha, wadi or lake.

  E AMBIAS 19 can only be applied to its current state of concentration, the addition of a third solvent can inhibit its desired action.

  The application process used (nebulization, spraying, atomization, or other), only governs the requirements and conveniences of the site.

  The performance quoted treatment requires the choice of parameters of the application process of the AMBIAS -19 include in particular: The points of application. The delay.

  The characteristics of the jet: pressure, flow, direction, surface of contact etc ...

  Safety: Store on pallets in a dry, cool and ventilated place.

  Instructions for use: The AMBIAS 19 is recommended for aerosol room treatment: - Production rooms.

  - Deposits and storage rooms.

  - Sanitary spaces in industry and agro-food industry.

  - Waste treatment plants for household or industrial waste - Public landfills or wastewater treatment plants.

  The data in this data sheet are valid to the best of our knowledge. In no case can they constitute legal insurance on our part. The user is called upon to make the necessary tests and to take the various security measures. External factors affecting the smooth running of operations are multiple.

CHEMICAL COMPOSITION

AMBIAS -19

- EUG

  - East (Ac) Egyl - H, gal H, prtq - H, slow H, lev - Flav - Tan - Strl Sol gly

Claims (1)

  Preamble The BBK process is a process designed primarily for the treatment of smelly gases released into the atmosphere of sewage treatment plants, while having the ability to depollute the atmospheres of sites such as: Recycling, industry, livestock, ,, etc ....   This process acts by direct application of AMBIAS -19 on the gaseous effluent to be treated without particular conditions of temperature, pressure or volume.   Characterizing Part AMBIAS-19 is characterized by its qualities and adsorbents according to the nature of the gaseous compound contained in the targeted effluent.   The AMBIAS-19 is distinguished by its particularity of ensuring two different reactions within the same product; a physical reaction (adsorption) and a purely chemical one (absorption).   The grouping of the above-mentioned two treatment methods (absorption and adsorption) within AMBLAS-19 will subsequently be called this technique: ADABSORPTION.   AMBIAS-19 is applied to the gaseous effluent, to its concentration state (without addition of solvent), by spraying, nebulization or misting.