Dingwall Wastewater Treatment Works are one of many in the region that were constructed in the early 1980’s and are owned and operated by Scottish Water.
The Dingwall plant accepts waste from a network of underground sewers and road tankers that collect from a wide range of septic tanks all around the region. The waste goes through various stages of treatment at the plant.
The first stage of this process involves the waste being fed into two Primary Sewage Treatment tanks (PSTs). These are large circular tanks with concrete floors and walls designed to contain the waste for treatment. The waste is skimmed to remove solids. The remaining liquid is then filtered and fed into a mechanical maceration process.