Department of Municipal Hygiene and Occupational Health Lecture on environmental sanitation for 4th year Theme: WATER BODIES Pollution sources Lecturer Professor.Iskandarova G.T.

MATTERS TO BE analysis MAIN SOURCES OF WATER BODIES. CHARACTERISTICS OF HOUSEHOLD WASTE WATER. Industrial wastewater characteristics.

MAIN SOURCES OF POLLUTION OF WATER BODIES HOUSEHOLD WASTE WATER Manufacturing water Drainage water from irrigated lands WASTEWATER breeding complexes Storm water WATER WATER TRANSPORT With solid runoff of eroded land Molev rafting

CHARACTERISTICS OF HOUSEHOLD SEWAGE WASTE TERMED water withdrawn Ductwork (Sewer) AFTER USE IN HUMAN ACTIVITY.

ECONOMIC - DOMESTIC WASTEWATER As a result of use of the public tap water To meet the cultural and everyday And physiological needs.

NUMBER OF POLLUTION FROM PER PERSON ENTERING THE PUBLIC SEWERAGE SYSTEM DAY Ingredientnumber of pollution on one inhabitant, gr Substended matter 65 BPK 5 of not clarified liquid 54 BPK 5 of not clarified liquid 35

Ingredients The amount of pollution per capita suspended solids 65 BOD5 unclarified liquid 54 BOD5 clarified liquid 35 BOD unclarified liquid 75 BOD clarified liquid 40 nitrogen ammonium salts 8 Phosphates 3,3 Chlorides 9 SAS 2,5

\Wastewater resulting from direct use of water in technical operations; Wastewater from the auxiliary operations and processes; Waste water from the auxiliary and service departments. Characteristics of industrial wastewater Types of industrial wastewater in character education:

Municipal wastewater They are a mixture of domestic and industrial wastewater.

In the city sewer system must not descend Wastewa ter containin g toxic substanc es. Wastew ater produce explosiv e gases. Wastewa ter containin g oil and oil products, etc.

drainage water All that is grown in agriculture, grown only with irrigation water. For soil improvement (decrease in salinity) and increasing productivity of agricultural fields is carried drains.

Wastewater breeding complexes In these conditions, a qualitatively new type of wastewater - liquid manure, which, unlike conventional manure causes increase in pathogenic bacteria and helminth eggs.

Facilities for storage of liquid manure and manure must meet the following requirements : ensure the prevention of the spread of infectious diseases; - Exclude infiltration into the soil and groundwater;

The total capacity of manure should be calculated for the period, provides an exemption from manure pathogens and helminth eggs (at least 6 months) from the date of receipt of their last portions.

Storm sewage Storm sewage consist of: - Rainwater; - Meltwater; - Watering and washing water.

water transport Water transport is also a major source of water pollution. On ships formed 3 kinds of wastewater: 1. Fecal 2. Household 3. bilge produced in the engine rooms that contain petroleum products and phenols.

Pesticides get into water bodies: with rain and melted snow; pesticide contamination - With drainage and water collector; aviation and ground handling; with sewage enterprises pesticides.

The composition and properties of water reservoirs or water in paragraphs drinking and cultural and community water should not exceed the limits of maximum permissible concentrations of harmful substances in water reservoirs.

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