wastewater process

The Process

  • The sewage is pumped to the wastewater plant by the over 100 lift stations, which are situated in various areas of town.
  • The lift stations pump the influent to the wastewater plants screens, which remove unwanted material from the influent.
  • The influent then flows to the plants covered storage tank. The cover keeps the odors from hydrogen sulfide (rotten eggs) contained within. Six large mixers keep the solids and liquid in suspension.
  • The influent is then pumped to one of our four plants for aeration. As the organic matter decays and the bacteria grow it uses up oxygen, so air is added to maintain a desired dissolved oxygen level.
  • The process is monitored by computer 24 hours a day and daily laboratory testing by Department Of Environmental Protection licensed operators. The plant is run to a precise set of parameters which include pounds of solids, sludge age, and other complex criteria.
  • A set number of solids are removed from each plant each day to maintain the process. The solids are pumped to a digester, which is a much thicker form of waste than seen in the plants. The bacteria are still working and digesting the solids, so air is needed to keep them alive. After 20 –30 days in the digester the solids are dewatered and taken to a landfill.
  •  The wastewater that has not been removed stay in the plants and move to the clarifiers. In this section the solids move slow and settle to the bottom and the clear water flows over a set of weirs.
  • The water moves directly to three sand filters for final filtration. The filtration process reduces the Total Suspended Solids to less than 5 mg/L or 5 Parts Per Million.
  • The plants average is less than 2 Parts Per Million. The final treatment step is disinfection, which destroys pathogenic (disease- producing) organisms. We use liquid chlorine, which is continuous monitored and computer controlled to maintain a disinfection chlorine residual.
  • The clean and disinfected effluent is the pumped to golf courses and various customers around town.
If all treatment plants are in operation we can supply our permit maximum of 1.4 Million Gallons a Day.

This a great example of going "Green” with 100 % recycling of a important natural resource