Study On Occupational Disease Hazards And Protective Measures In Domestic Sewage Treatment Process

The thesis adopted the occupational hygienics investigation, made test on the occupational-disease-inductive factors according to the existing national occupational hygiene standards, chosen the example of the sewage treatment plants that operated in qingdao,made the sewage treatment plants analysis and test on the occupational-disease-inductive factors, study on the factors of occupational hazards. the links and the main operations of occupational disease existing. the degree and the ways of occupational disease hazard in domestic sewage treatment process, In this foundation, bring forward targeted preventive measures. From investigation. test. Analysis, draw the main conclusion that:(1) Biological activated sludge process are mainly adopted in Domestic sewage treatment,The major risk factors were odour, dust, noise,Microorganisms, etc.(2) The odour mainly consist in the first sedimentation basin.sludge thickener and in treating soil sludge. Made more odour in treating soil sludge than in wastewater treatment. The examination results indicated that H₂S concentration of sludge dewatering equipment exceeds TLV-STEL in GBZ2-2002,the key administration is required.The available protective countermeasure can be preventing anaerobic conditions. holding back the respiratory of biomass.reducing the sulphur content in sewage. reducing the concentration of the atmospheric odour. Renovating the operations to reduce discharge of the odour.(3) The dust is mainly from dose room and during xeransis sludge transportation; The available protective countermeasure can adopt Automation System for dose, adopt wet method operation during xeransis sludge transportation .(4) The noise is mainly from mechanical power noise which can be generated within pump.blower. hoisting and agitating machinery. The examination results indicated that the post of noise para-normal are mainly Luochi Ventilator Room and Biogas Ventilator Room.The available protective countermeasure can adopt new type low noise equipments, set up sound insulation duty room,and adopt measures to denoise and sound insulation measures.(5) Pathogenic microorganism mainly consist in Sewage. The available protective countermeasure can strengthen individual protection, acquire good personal hygiene habits and healthy Immunity protection.