If wastewater is ingested, a doctor's advice should be sought. Antibiotic drugs may be prescribed to prevent minor digestive problems that could occur. Proper ventilation is important in reducing biological risks. Studies have shown that pathogenic microorganisms are higher than expected in poorly ventilated areas, such as inside grit chambers, inside bar screens, and sludge processing areas. Pathogenic microorganisms are generally lower than expected in outside areas and properly ventilated areas, such as outside grit chamber and aeration basins.
Proper ventilation offers protection from biological hazards, explosions, and toxic gases.
Automation of the treatment facility, which reduces worker contact with wastewater also reduces worker illness rates. One study relates lower exposure risks to increased automation of treatment facilities. Other studies indicate that the risk of illness is greater as the length of contact time or contamination level increases. Automation or work practices that reduce contact time with areas of high contamination create a safer working environment. Summary It is important for workers to know what microorganisms may be present in wastewater and how these microorganisms enter the body.