There are various reasons for determining the bad odour from any sewage mechanism and ascertaining those grounds is one of the most integral steps to control the odour.  Seemingly, anaerobic decomposition of organic compounds generates a foul odour at the sewage treatment plant and their low solubility in wastewater makes them liberate into the environment causing offensive odour. Understandably, these sewage odours often pollute the entire nearby surroundings and are not meticulous matters that can be tolerated. Although controlling these repellent odours sometimes get a bit challenging, however, few steps can be pursued. Initially, we would recommend discovering the reason behind odour and then trying to look for  odour control technologies   accessible.  Consult an expert If you haven’t treated the plant in recent days or didn’t consult for service, we would suggest speaking to your local service providers. Some plants require a deodorizing misting system to target volatili