The collection system is often viewed as a means to transport wastewater to the treatment facility. However, many hours of retention time in the collection system can negatively impact the wastewater treatment process. Growth of filamentous bacteria and sulphate-reducing bacteria (SRB), which leads to the production of hydrogen sulfide and odour-causing bacteria, dominate the wild microbiology of the collection system. Indigenous biological growth within the collection system is generally considered detrimental to the treatment objectives at the wastewater treatment plant.
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