Septic sludge receiving station
with grit and fog removal - STU/CR.DEG.BOT

Data Sheet

Technical Specifications

  • Frame in AISI 304/316 stainless steel, depending on requirements
  • Shaftless spirals in high tensile carbon steel or AISI 304/316 stainless steel, depending on requirements
  • Lifting pipes: made with wear bars in stainless steel. The construction solution allows easy replacement of the bars
  • Screenings washing system: high efficiency type. Allows washing of the screenings and reduces the risk of grit settling in front of the screen
  • Inlet: “Perrot” type quick coupler with electrically operated ball valve
  • Maximum inlet flow rate: 100 m³/h
  • Stone Trap model for gravel and stones removal
  • System for bagging extracted solids: in single bags or continuous liner
  • Septic tank soil treatment plants
  • Shaftless spiral, so no jamming even in the presence of long fibrous material and other hard-to-transport products
  • Grit separation
  • No mechanical components in contact with the product
  • The machine can operate without the presence of an operator
  • Reduced rotation speed
  • Reduction of screenings volume of up to 40% and more, depending on the nature of the products
  • Reduced investment
  • No civil works required
  • Reduced maintenance costs
  • Reduced installation costs
  • Reduced space requirements
  • Absence or reduced presence of organic matter in screenings at discharge
  • Reduced volume of products for disposal
  • No feed pump required


Send now your request, you will be contacted as soon as possible!.

Spare Parts

Click below for original spare parts for your machines!


In Definitive Ecology’s STU/CR.DEG.BOT soil treatment unit with grit and F.O.G. (Fat, Oil & Grease) separation, the vacuum truck tank is connected to the plant inlet by means of a “Perrot” quick coupler and an electrically operated ball valve. Once discharge has started, solids larger than the spacing are retained on the screen. This results in a rise in the liquid level upstream of the screen: when the level reaches a pre-determined value screw rotation and the screenings washing system are started. The solids are lifted, washed and compacted/dewatered before being unloaded. The wastewater leaving the screen enters the separation tank where the grit settles. A special aeration system that operates continuously with the inlet of wastewater optimises settling and promotes separation of organic substances. The liquid level in the tank is predetermined to optimise grit settling. An aeration system and a system of reduced rotation speed screws separate the grit from organic substances and removes the grit by transporting it clear of the water level, from where it is transferred to the discharge point. During transport the grit is dewatered before reaching the discharge port. In addition, oil brought to the surface through the action of the aeration system is removed by means of a skimmers system.


  • STU/CR.DEG.BOT = compact soil treatment unit with grit separation and F.O.G. separation