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Genética Chemical Technology

Genética Chemical Technology operates in the extensive study and research of the reactions and effects of traditional chemical applied in the wastewater treatment, in order to create products that improve these processes in terms of efficiency, biodegradability and safety. This principle is called green chemistry, making the combined environment.

CHEMICAL SOLUTIONS

• Green Chemistry - R&D
• Biodegradable Antifoam
• Effluent Clarification
• Treatability studies of effluents 
• Treatability study through nanotechnology
• FENTON - Oxidative reaction for reduction of BOD
• OXYGEN SPRING - Oxidative reaction for reduction of organic compounds

Some chemical solutions

Green Chemistry - R&D

Genética Tecnologias Ambientais: Engenharia Ambiental, Energias Renováveis, Tecnologias Biológicas, Químicas e Analíticas Novo Conteúdo 34 Green chemistry is a line of thought that has been widely spread more and more in order to make the...

Green chemistry is a line of thought that has been widely spread more and more in order to make the chemistry coupled to the environment. It is based on steps aimed at the improvement of chemical processes such as:

  • Efficiency;
  • Safe products;
  • Renewable resources;
  • Biodegradable products.

With the increasing restriction of the effluents discharge parameters  (BOD of discharge less than 2 mg·L-1), in many cases it is necessary to apply a chemical oxidation process for polishing after the biological process, eliminating these remnants of BOD, for example.

Another case, is the development of products for controlling undesirable reactions inside biological system without risks to the present bacteria, for example, a specific antifoam.

Click on the side menu and see what we can offer in this line.

Biological antifoam

Antifoam: Genética G7

The major challenge is to eliminate the effects of foaming that affects reactors and ponds in wastewater treatment operations without causing negative effects to the biological process.

Genética Environmental Technologies has thorough knowledge of microbiological fermentations therefore developed for its own use one antifoaming line to control the foam in its fermentations. Due to the great demand and the difficulty in finding products with the same benefits in the market Genética Environmental Technologies finally decided to market this particular product.

Antifoaming Genética G7: with lasting action in foams.

Treatability wastewater studies

This is one of the most demanding and successful studies of the Genética Group.

Simply and directly, we analyzed:

- Maximal anaerobic digestion of COD and BOD in the wastewater test;
- Maximal aerobic digestion of COD, BOD, nitrogen and phosphorus in the wastewater test;
- Better physical-chemical reaction in the wastewater test;
- Toxicity to wastewater components.

With these results you can:

- Compare the maximum conversion to the effluent and condition of the current system in operation;
- Change, with confidence, the operating parameters for efficiency increase in operating systems;
- Reduce energy and chemicals consumption;
- Use the study to design ETPs safely, minimizing errors;
- Discover possible toxicities that harm the good performance of the ETP and case.

Test parameters: raw effluent

◦ Used sample volume: 600 mL;
◦ COD of the sample: 6,500 mg∙Lˉ¹;
◦ Removal efficiency: 95 %;
◦ 0.527 m³biogás∙kgCODrem-1;
◦ Gravimetry 
  - TS= 6,900 mg∙Lˉ¹;
  - TVS= 4,692 mg∙Lˉ¹;
  - TFS= 2,208 mg∙Lˉ¹;
  - Relationship between volatile solids by dry matter = 0.68;
◦ F/M= 0.453.

 


[ ] CH4 (%) [ ] CO2 (%) [ ] O2 (%) [ ] Bal. (%) [ ] CO (ppm) [ ] H2S (ppm) [ ] H2 (ppm)
Step 1 54.5 28.4 1.5 15.7 7 >500 7
Step 2 73.7 19.0 1.3 6.0 5 234 5
Step 3 77.8 9.2 8.8 4.2 2 3 0

◦ F/M = 0.453. The recommended working with this effluent is  F/M 0.15.

◦ Considering the flow of 600 m³∙day-1 x 24 days (R$ 45.00 m³ of wood) can generate savings of R$ 11,393.18 per month in wood with the use of biogas.

Treatability through nanotechnology study

In the nanotechnology area, our specialty is conducting trials with synthesized nanocomposites for textil industrial wastewater, petrochemical or any other residue which consists of aromatic compounds and special phenolic compounds.

We look for less impacting alternatives

Our team of Research and Development has been seeking in recent years, the development of new technologies that provide a solution against environmental impacts. The focus involves an advanced scope of technologies for the degradation/removal of organic and inorganic waste efficiently. These technologies are associated to the reduction of factors that harm the environment and applied in the treatment of industrial effluents with high toxic complexity.

FENTON - oxidative reaction for reduction of BOD

Conventional wastewater treatment processes such as anaerobic and aerobic systems, are not always sufficient to degrade the persistent toxic organic contaminants and/or difficult degradability. Facing this problem, Genética Environmental Technologies studies in these cases the possibility of applying the Fenton reaction.

Do you want to learn more about it?

The Fenton reaction that generates the Hydroxyl Radical, is stronger than ozone itself, follows the reaction:
 

(1) Fe2+ + H2O2→ Fe+ + •OH + OH-

Oxidant Potential (V)
Fluorine 3.03
Hydroxyl radical 2.80
Atomic oxygen 2.42
Ozone 2.07
Hydrogen peroxide 1.77
Permanganate 1.67
Hypobromous acid 1.59
Chlorine dioxide 1.50
Hypochlorous acid 1.49
Chlorine 1.36
Bromine 1.09
Iodine 0.54
 
According to Equation (1), it is known that 1 mol of Fe+2 reacts with 1 mol of H2O2 (being the relation of 34.01/55.85).
 
Despite the greater speed of reaction between Fe+2 and H2O2, the use of Fe+3 is more convenient because the iron in this oxidation state is more abundant and has lower cost.
 
The decomposition of H2O2 per Fe+3 generates Fe+2 reduced species which also reacts with H2O2, and hydroperoxyl radical. The Fe+2 ion can also be reduced by this radical generating OH- radicals by Fenton reaction.
 
(2) Fe3+H2O2 → FeOOH2+ + H+ 
      FeOOH2+ → Fe2+ + HO2• 
   
  Fe2+ + HO2• → Fe3+ + OH-
   
  Fe3+ + HO2• → Fe2+ + O2 + H+ 
     
 H2O2+ •OH → HO2• + H2O
     

Using these reagents, many organic molecules may be easily oxidized without use of high pressures, high temperatures and complex equipment.

Hydroxyl Radical generation

Fenton generates hydroxyl radicals (•OH), with high potential for oxidation-reduction (2.3 V), indiscriminately attacking all species present in the reaction medium enabling obtain aimed results. The Fenton reaction is the one whose generation of hydroxyl radicals is performed by decomposition and catalyzed by Fe ions in an acid medium and can be seen in the above equations. In other words, this radical is formed from the reduction of molecular oxygen by 3 electrons in the Fenton reaction catalyzed by metals. When the H2O2 reacts with Fe ions, receives another electron to form the hydroxyl radical.

Fenton Attributions

With the Fenton reagent there is no possibility of formation of undesirable halogenated compounds during the pre-oxidation process, a fact which would not occur using chlorine as the oxidant. The Fenton reagents can mineralize most organic pollutant compounds.

NASCENT OXYGEN - oxidative reaction for reducing organic compounds

Genética Tecnologias Ambientais: Engenharia Ambiental, Energias Renováveis, Tecnologias Biológicas, Químicas e Analíticas Novo Conteúdo 23 Genética Environmental Technologies is a pioneer in Brazil in implementing this interesting...

Genética Environmental Technologies is a pioneer in Brazil in implementing this interesting reaction. In some cases, the results are as effective as the Fenton reaction.

 
See how it works:

It is a very reactive species of oxygen, which is associated to the action of many oxidants. The nascent oxygen is represented as follows: [O]. It is as a free-oxygen atom in the system which reacts chemically in order to establish covalent bonds, which can share two electrons. In the process, [O] oxidizes other molecules. The [O] is formed on some systems where there are strong oxidants.

Oxidant Potential (V)
Fluorine 3.03
Hydroxyl radical 2.80
Atomic oxygen 2.42
Ozone 2.07
Hydrogen peroxide 1.77
Permanganate 1.67
Hypobromous acid 1.59
Chlorine dioxide 1.50
Hypochlorous acid 1.49
Chlorine 1.36
Bromine 1.09
Iodine 0.54
 
H2O2 + NaClO  →  O2+ H2O + NaCl + hv
 
Hydrogen peroxide can react directly with organic compounds. However, the combination of H2O2 with NaClO generates O2• radical, a stronger oxidant.
 
Sodium hypochlorite and hydrogen peroxide are substances that when in contact, promote effervescent reaction with large gas release(formed from the nascent oxygen intermediate) occurring release of heat which occurs because the energy required for the synthesis of the reagents (NaOCl + H2O2) are greater than the energy of the resulting products of these chemical reactions (NaCl + H20 + 02).
 
In hypochlorite, the atom which undergoes reduction is Cl (from +1, ClO-, to -1 in Cl-). In hydrogen peroxide, oxygen goes from O2-2 to O-2 + O0 (nascent oxygen, or [O]) and that [O] is the atom that undergoes reduction in general the O-2, oxidizing other elements.