WATER TREATMENT SYSTEMS AND DEVICES BNREO
Ozone in Water Treatment Sector
Ozone gas first began to be used for the purpose of disinfection in the water treatment sector. Due to high ozone oxidation capacity together with progressive purpose, many research results have been used in the water treatment sector.
However, it is still the most widely used again in order to disinfect the water. should be aware of is that in dealing with environmental technology Environmental Engineers;
"Ozone water treatment industry compared to many existing chemical disinfection as the most reliable and supposedly is an application that does not require high investment. positive contributions to the water in the other water-disinfection chemicals other than oxygen, such as a practice sağlar- leaving any residue. "
We have to practice as chlorine disinfection in general education in the university and has tried to provide information about the associated calculations. But over time, we learned that water is the most negative practices that can be applied chlorine disinfection.
According to the studies of the ozone gas and water as well as water deznefeksiyo undesirable flavor, odor, turbidity removal is also possible.
Although limited application and research on the removal of smell and taste in our country, for that matter abroad was seen as very advanced in research conducted ozone is much safer and more economical solution compared to the materials and chemicals used in the removal of other taste and smell.
We would like to emphasize also that the use of ozone together with other disinfectants despite the risk of interference that may occur in urban water network length and network is seen in the front. The reason is also because of its short half-life of ozone in water and a small amount of water should not leave any residue even if the use of other disinfectants.
However, the amount of ozone used in combination with other disinfectants much too low, it cuts the negative side of other disinfectants (any residues, other chemical transformation etc.) Contributes to the disposal.
This is the overseas uygulamalarıda this regard.
Ozone Applications in Wastewater Treatment Industry
Here we will not talk about the causes and consequences of industrialization. Here our world already during the production process to reduce the production of certain chemicals that we contaminate OZONE We will talk about the application.
We design for Environmental Engineers, Our most extensive work in terms of investment and operating the wastewater treatment industry currently.
However, so far these issues and especially all coagulation chemicals used in the purification of industrial waste water other than ozone always.
Currently, investments in wastewater treatment sector in our country is seen more markedly than that of all ozone is examined coagulant used.
Especially in chemical load (COD) coagulants are used in several high wastewater. They separately for preparation, dosing, mixing systems are being designed and thus, the cost of operating in both high initial investment is established plants.
Ozone gas has begun to replace many of the currently used coagulant because of too high oxidizing capacity. Thus, it is possible to design a low initial investment and operating costs of systems.
jeneraötür only an ozone gas applications in the wastewater and the ozone contact tank (half-life is short due to smaller size) is not sufficient for the design. However, an application that is easier to control than other chemicals.
In particular textiles, with several oxidizing and bleaching chemicals are used in particular stages of manufacture characterized in leather and paper industry are used at higher rates.
This ozone gas instead of the use of chemicals by the conclusion of this process, the organic load will be reduced to the wastewater treatment plant and huge savings in investment and operating costs will be provided accordingly.
Before the design of the wastewater treatment plant of the preliminary work done on this issue is sure to give much better results.
studies on the use of ozone in wastewater treatment is increasing rapidly.
Generally in the industry Ozone Applications
- Unwanted taste, smell and color of the Clearing
unpleasant taste and odor of the groundwater and surface water sources are organic or synthetic organic material commonly found in water. Their formation decay of plant, bacterial activations, hydrogensulfite, especially underground and surface water is caused to occur in the taste and smell.
Because ozonation process with ozone to oxidize all of these agents provide significant increases in water quality.
The color problem in surface water located within humic as fuvik and tannic acids are due to organic substances. These substances are formed by the accumulation of the decomposition of plant and phenol compounds. Such compounds can be oxidized with ozone in a very efficient manner.
The color removal in wastewater treatment systems UmUdUr in one of the most difficult applications. Ozone is the most appropriate solutions in this regard.
colors Studies have shown that removal was achieved in 99% yield using a yield these values reach of other chemical methods.
Especially textiles, leather, color is a major problem in the paper industry wastewaters.
- Elimination of undesirable substances
found that ozone treatment to remove iron and manganese ions as a water-water system in this regard is the ideal solution. these materials are oxidized with ozone are ejected in the form of precipitates.
However, the oxidation of manganese is harder than iron. Therefore it should be higher ozone consumption for manganese removal in design. Water 1 mg. about 0.87 mg of ozone for manganese removal is required. In practice, the pH of water to the amount of ozone, the contact period may vary depending on the amount of ozone and other organic substances in water.
Cyanide in water, with the nitrogen ozonation process such as cyanate and thiocyanate anions is very easily oxidized.
Many organic substances, in particular chemical waste, phenolics, pesticides, detergents, aromatic compounds, humic acid, proteins and amino acids are oxidized by the ozone.
Other metals which may be removed in water and lead, silver, cadmium, cerium, nickel and zinc. likewise it can be removed from water by decantation in ozone oxidized metals.
- Microbiological Purification of Water
Ozone oxidation capacity is the highest and most powerful disinfectants. It shows high oxidation potential full effect on microorganisms. This effect is manifested microorganisms penetrated the cell membrane.
The most important aspect in this matter, since not react with ozone water to oxidize other organic materials primarily those substances is then no effect on microorganisms. Therefore was pretreated (activated carbon, etc.). The amount of ozone in the water to be applied is further reduced.
- Increasing Degradability of organic substances in water
(COD - Chemical oxygen removal in contributions)
Ozone used in the art wastewater treatment system provides a significant contribution in reducing the chemical load in the waste water by application of biological treatment by pretreatment. Thus, chemical and biological treatment to be given to reducing the organic load in the purification plant shows considerable increase in effluent quality.
Especially in excess of ozone pollution industry (textiles, leather, milk, paint) with a high rate of use in the industry were observed in study provides COD.
- In Ammonia Removal
Some activities ozonation process water with nitrite is converted to nitrate resulting from readily oxidized. However, ozone is difficult to eliminate with ammonia. In the oxidation of ammonia with ozone the pH is very important.
The reaction balance, pH 7 - is not more than 9 tends naturally to free ammonia, and observed for a particular oxidation state.
It is then oxidized to nitrate to nitrite before ammonia is oxidized with ozone. When the conditions are met 1 g. 3.05 g of oxidation of ammonia to nitrite and nitrate, ozone is required.
In short, ozone, water and wastewater facilities can make employees more efficient with the use of the refining sector.
- Chlorine / Chlorine Dioxide Disinfection with
Disinfection system is the most widely used in Turkey. It is proven ill effects as a result of many studies in the world, though it is the cheapest method in terms of investment and operating costs.
disinfection efficiency than other methods less. Operating costs are almost the same as well.