Davangere 38254-053-ind-iee-02.pdf - kuidfc

54• Hazards to public health due to overflow flooding, andgroundwater pollution due to failure of sewerage system?• Deterioration of water quality due to inadequate sludgedisposal or direct discharge of untreated sewage water?• Contamination of surface and ground waters due to sludgedisposal on land?• Health and safety hazards to workers from toxic gases andhazardous materials which may be contained in sewageflow and exposure to pathogens in sewage and sludge?discharging courses.Regular maintenances of sewer linehave to be carried out to avoid overflow of sewer lines and related impactof public health due to pollution.There is no possibility for groundwaterpollution due to failure in seweragesystem as the ground water table issufficiently deep (30-50 feet )Sludge from the bottom of SBR has tobe removed at regular intervals(normally once in 2-3 years) to avoidre-suspension in the treated waterand there by deteriorating treatedwater quality.Direct discharge of untreated sewagewater is not anticipated.Sludge should be disposed off only inpre-identified disposal sites. Thesludge disposal areas should beproperly lined with geosynthetic liningsuch that it will not leach to the nearbywater courses / land and polluteenvironment.Mixing of hazardous / industrialeffluents with sewage may result intoxic gas formation in sewer and STPwhich should be avoided throughproper law and enforcement.The sewer cleaning and STP workersshould be provided protectivemeasures such as boots, masks etcto avoid exposure to pathogens insewage and sludge.