Our heterocyclic compounds has been developing from 2015 year, it is a relatively new class of compounds in our company. Our heterocyclic compounds conducted by a dedicated research and development teams. The R & D team focused on researching heterocyclic compounds, other products are performed by other technical team. Our goal is to catch up with the industry's professional heterocyclic manufacturer. At present our products are mainly composed of pyridine, pyrimidine, thiazole. In addition to our regular products, we accept any form of customized services, to undertake from grams to tons of production. After receiving inquiry, we will give a quotation within 2 working days with coa specifications,If you have special requirements, please provide details in the mail, we will combine the specific requirements and provide an accurate accounting of the costs of the offer. Under normal circumstances, we have the longest production cycle is not more than 45 days. Heterocyclic Compounds Heterocyclic Compounds,Cyclopropanecarboxylic Acid,Benzenedithiol Dihydrochloride Taizhou Volsen Chemical Co., Ltd. , https://www.volsenchem.com
The process of combining ozone with other treatment methods can take many forms, such as: 1O3+ biochemical (activated sludge, biological activated carbon method); 2O3+ flocculation + membrane treatment; 3O3+ membrane treatment; 4O3+ air flotation (blowing); 5O3+ activated carbon adsorption; 6O3+ Flocculation + O3. The ozone treatment unit itself has the following forms: 1O3; 2O3/H2O2; 3O3/H2O2/UV; 4O3/UV; 5O3/solid catalyst (solid catalyst such as activated carbon, metal and oxide thereof).
2. Ozone/Activated Carbon Technology In the reaction, activated carbon may accelerate the decomposition of ozone to form free radicals such as ·OH, just like the action of OH- in an alkaline solution. As a catalyst, the reaction of activated carbon and ozone to degrade trace organic pollutants is the same as other reactions involving ozone generation and OH (such as increasing pH, adding H2O2, UV radiation).
3. Ozone Biological Activated Carbon and Application of Ozone Biological activated carbon removal of organic matter includes three processes: ozone oxidation, activated carbon adsorption and biodegradation. That is, in the removal of organic matter, the strong oxidizing ability of ozone is first exerted, and the organic substance is oxidized into a small molecule organic substance which can be biodegraded, and then adsorbed by the good adsorption property of activated carbon, and then adsorbed by the biological adsorption on the activated carbon. The organic matter is biodegraded, and the oxygen generated by the decomposition of ozone increases the dissolved oxygen in the water, so that the dissolved oxygen in the water is often saturated or nearly saturated, and provides the necessary conditions for biodegradation in the treatment of activated carbon. The ozone biological activated carbon water purification process (BAC method) combined with the ozone activated carbon filter is generally placed in the conventional water purification to remove organic matter in the water, and due to the application of biotechnology, the operation of the activated carbon is greatly prolonged.
2. Ozone oxidation treatment of industrial wastewater 1. Industrial wastewater Whether drinking water or wastewater, ozone reacts with simple or complex organic materials to obtain some of the same products: acetaldehyde, carboxylic acid, aliphatic, aromatic and other oxides. form. These products are readily biodegradable and have no significant toxicity.
Ozone not only oxidizes inorganic substances in water, such as CN-, NH3, etc., but also oxidizes organic substances that are difficult to biodegrade, such as aromatic compounds. There are two ways to ozonate: one is that ozone directly participates in the reaction through nucleophilic or electrophilic interaction; the other is that ozone reacts with pollutants through active free radicals under the action of alkali and other factors. Ozone can react with many organic substances or functional groups: C==C, C≡C, aromatic compounds, Heterocyclic Compounds, carbocyclic compounds, ==N-N, ==S, C≡N, C-N, C- Si, -OH, -SH, -NH2, -CHO, -N==N-, etc. The role of ozone destruction and removal of pollutants from wastewater has been extensively studied, and some studies have been conducted on the products of organic ozonation. Studies have shown that the ozonation products are mainly monoaldehydes, dialdehydes, aldehyde acids, monocarboxylic acids, dicarboxylic acid organic small molecules.
Third, hospital sewage ozone treatment
Ozone has a strong ability to kill almost all bacterial propagules, buds, fungi, fungi, protozoa such as Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, Vibrio cholerae, Mycobacterium tuberculosis and worm eggs. The sewage condition of the hospital is complicated, and it must be pre-treated before disinfection. Generally, the ozone dosage of the primary treatment effluent is 30-50mg/l, and the secondary effluent ozone dosage is 15-20mg/L. Disinfect with ozone after treatment.
The main advantages of ozone disinfection:
1. High efficiency: uniform diffusion, good inclusiveness, overcomes the weakness of many dead angles in ultraviolet sterilization, can be quickly and efficiently disinfected and sterilized in all directions; strong sterilization ability, fast effect, sterilization speed 600--3000 times faster than chlorine, It can kill viruses and buds that are highly resistant to oxidation.
2. It is less affected by the pH value of the sewage and the water temperature.
3, can remove the color, smell, taste and phenol cyanide and other pollutants in the water, increase the dissolved oxygen in the water, change the water quality.
4. It can decompose organic and tri-materials that are difficult to biodegrade and improve the biodegradability of water.
5, high cleanliness. Ozone has the property of natural decomposition. There is no residue after disinfection, no secondary pollution, and no halogenated organic matter with carcinogenic effects.
6. The preparation of ozone requires only air, oxygen and electric energy, does not require any auxiliary materials and additives, and does not have the problem of transportation and storage of raw materials.
4. Other sewage ozone treatment 1. The textile printing and dyeing wastewater adopts advanced ozone + ultrasonic strengthening + biochemical treatment process to remove the azo dye decolorization effect, high organic matter removal rate, and effectively treat high concentration PVA pulverized sewage.
2. Tanning wastewater is characterized by high concentration of organic matter in tannery wastewater, physicochemical + biochemical treatment method, and AO process in biochemical section. The treatment effect of this type of sewage is good.
3. Chemical wastewater The chemical wastewater containing benzene, phenol, cyanide and other toxic substances is treated with ozone to effectively remove this harmful substance.
4. Food wastewater adopts AO process to treat food wastewater, which is easy to operate and operate, with small floor space and good treatment effect.
The company's main: ozone generator , drying equipment, mixing equipment, dry heat sterilization equipment
1, and wastewater ozonation prospects <br> development techniques may <br> ozone treatment are two aspects: First, after ozone treatment as a pretreatment or used in combination with other treatment methods, such as flocculation, flotation, Biochemistry, etc.; the second is the development of the ozone treatment unit itself, such as photocatalysis, metal catalytic oxidation.