1. Presentation of practical lessons on environmental sanitation for 4th year 7 - semester

2. 5- THEME : Methods for purification of drinking water. Hygienic evaluation of the effectiveness of the treatment facilities under a special cleaning methods.

3. 1 Special methods for improving the quality of drinking water 2 Meaning dezorotatsii water 3 Methods for removal of iron from water 4 Methods of water softening 5 Methods of desalination 6 defluorination of water 7 Fluration of water The Theme. Methods for purification of drinking water. Hygienic evaluation of the effectiveness of the treatment facilities under a special cleaning methods. The Theme. Methods for purification of drinking water. Hygienic evaluation of the effectiveness of the treatment facilities under a special cleaning methods.

4. P URPOSE OF THEME : Learn special techniques to improve water quality of centralized water supply and basic facilities main at improving water quality Teach students with special metodom improve water quality - Learn the basic legal documents regulating the activity of the doctor in the communal hygiene When assessing the effectiveness of the treatment facilities. - To teach students to use the legislative framework in its assessment of the effectiveness of the treatment plants and giving an opinion. - To teach students to correctly assess the effectiveness of the treatment facilities.

5. S TUDENT SHOULD KNOW : -Methods to improve water quality - Basic techniques to improve water quality - Specific methods for improving water quality

6. S TUDENT MUST KNOW : Be able to evaluate the effectiveness of sanitary facilities at the main methods used to improve water quality Facilities at the main methods used to improve water quality

7. T EACHING SEVERE QUESTIONS Special cleaning methods Water iron removal drinking water Requirements for reagents for water fluoridation Devices desalination plant Distillation method and hyperfiltration

8. Removal of iron from groundwater frequently produce RFIC, aeration methods. At the heart of reagent-free methods are pre-aeration of water in order to remove free carbon dioxide and hydrogen sulfide To improve the quality of water used 2 methods: Basic methods of improving the quality of drinking water Specific methods to improve the quality of drinking water Specific methods for improving water quality Deodorization removal of tastes and odors of water deferrization- removal from the water surplus of iron salts softening- understateme nt natural water hardness Water- Desalination is the removal of dissolved mineral salts defluorination - removal of excess fluoride from water

9. The special methods of improving the quality of drinking water include air conditioning mineral composition, the removal of tastes, odors, decontamination, etc. All kinds of conditioning the mineral composition of water can be divided into 2 groups: Group 1 removal of excess salts from the water and gases (softening, desalination, deferrization, deodorization, decontamination, defluorination and so on.) Group 2 addition to water of various salts to improve its organoleptic properties or increasing the content of trace elements, which is not enough water and food (fluoridation deodoration- removal of tastes and odors of water

10. Iron removal is performed by spraying water to the aeration settings special cooling towers. Wherein divalent iron is oxidized to iron (III) hydroxide, or deposited in the sump of the filter is delayed by. Iron removal is performed by spraying water to the aeration settings special cooling towers. Wherein divalent iron is oxidized to iron (III) hydroxide, or deposited in the sump of the filter is delayed by. Softening decrease in natural water hardness. The methods of water softening include: reagent ion exchange thermal Of the most common methods of reagent sodovo- lime, whereby calcium and magngy deposited in the sump in the form of insoluble salts (calcium and magnesium carbonates, etc.). More modern method is to filter the water through filters filled with ion exchangers, - cation exchange softening. Ion exchangers can be natural or synthetic (organic or mineral) origin, practically insoluble in water and organic solvents

11. Desalination is water- removal of dissolved mineral salts to the values recommended by the state standard in which the water is suitable for drinking or for technical purposes. Desalination is water- removal of dissolved mineral salts to the values recommended by the state standard in which the water is suitable for drinking or for technical purposes. The most common methods of desalination for water pipes are: distillation Chemical (ion exchange reagent) With the use of selective membranes Ions are divided into cation (exchangeable cations) and anions (able to exchange anions)

12. Types and methods of improving water quality and composition of wastewater treatment plants depends on the initial quality of the water source waters To improve the quality of water used 2 methods: Basic methods of improving the quality of drinking water Specific methods to improve the quality of drinking water Specific methods for improving water quality water fluoridatio n For the fluoridation of drinking water can be used fluorine- containing compounds, in particular sodium silicofluoride, silicofluoride acid sodium fluoride, ammonium silicofluoride, calcium fluoride, hydrofluoric acid, etc. Water defluorid ation Reagent (Deposition methods) -Filtration

13. N EW EDUCATIONAL TECHNOLOGY USED IN THE LESSON hyperfiltrti on membran e method distillation ion exchange desalination

14.  Special cleaning methods Water iron removal drinking water Requirements for reagents for water fluoridation desalination plant Distillation method and hyperfiltration The ion-exchange method and the electrolysis Using special cleaning methods Reagent and reagentless method deferrization The composition of the plant for iron removal Noncommunicable diseases related to the content of fluorine Reagents for water fluoridation Reagent and filtration methods defluorination. C ONTROL QUESTION

15.  Summary: 1. "Health" under the guidance of prof. Demidenko NM T. 2003 2. Guide to laboratory work on communal hygiene Goncharuk EI Moscow 1990 3. Sh.T.Otaboev, T.I.Iskandarov, G.T.Iskandarova "Kommunal hygiene" Tashkent 2010 th. 4 "Kommunal gigienadan Amal mashgulotlar Uchun ukuv kullanma. "Edited by Academician Iskandarova TI T. 2006y 5. "Communal Hygiene" E.I.Goncharuk Kiev in 2007 I, II part U SE LITERATURE

16. - Iskandarova GT "Regional san. gig. problems of protection of water sources "water inpatient population of Uzbekistan. T. 2001. - Health rules and regulations of planning and building of settlements of the Republic of Uzbekistan 0003-93 - Sanitary norms of admissible levels of electromagnetic fields of radio frequencies 0064-96 - Sanitary rules of design and maintenance of cemeteries 0086-99 - Health rules and regulations and the optimum allowable building density residential areas of cities of Uzbekistan 0144-03 F ULL LITERATURE

17. CONTINATION -Sanitary rules and standards for design of residential buildings in the climatic conditions of Uzbekistan 0146-04 - Health rules and regulations setting up and maintaining public toilets 0151-04 - Hygiene requirements for institutions, organizations, companies and individuals involved in the disinfection activities 0177-04 - Health rules and regulations for the use of mobile phones 0189-05 - Lecture materials.

18. O'z.Res.SSV veb-sayt WWW.minzdrav.uz TTA sayti – WWW.tma.uz. htt://web.tma TMA Wi-Fizone ZiyONet I NTERNET SITES