Sludge Recirculation System

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Sludge Recirculation System

The Sludge Recirculation System is an essential component of a biogas plant, designed to maintain uniform slurry consistency, improve microbial activity, and prevent sediment accumulation inside the digester.

TECTIKO sludge recirculation systems continuously withdraw slurry from the digester and reintroduce it after homogenization. This process ensures effective mixing of fresh feedstock, balanced temperature distribution, and enhanced biodegradation efficiency—resulting in improved gas yield and stable digester operation.

The system is fully automated, energy-efficient, and engineered for reliable 24×7 heavy-duty performance in demanding biogas environments.

Why Sludge Recirculation is needed

  • Prevents scum and grit layer formation Ensures homogeneous slurry mix
  • Maintains uniform temperature throughout digester Boosts microbial activity and digestion rate
  • Helps remove sediment buildup Reduces maintenance downtime

      Key Features

  • Heavy-duty sludge transfer pump (progressive cavity / centrifugal)
  • Optimized recirculation pipelines with back-pressure control
  • Sludge discharge nozzles positioned for maximum digester coverage
  • Automation ready – PLC / SCADA compatible
  • Non-clogging design, suitable for 8–12% TS slurry
  • SS / HDPE / MS rubber-lined pipe options
  • Low power consumption with high flow efficiency

      Parameter                                                                   Specification

  • Pump Type                                                       Progressive Cavity / Lobe / Centrifugal
  • Flow Rate                                                         5 m³/hr – 150 m³/hr
  • Head                                                                 5 – 25 meters
  • Operating Temperature                                  Up to 55°C (Anaerobic digestion range)
  • Slurry TS Capacity                                           Up to 12%
  • Power                                                                2.2 kW – 30 kW
  • Pipe Size                                                           2 – 6
  • Control System                                                Manual / Semi-Automatic / Fully Automatic

           

      System Components

  • Sludge Transfer Pump
  • Recirculation Pipeline Network
  • Valve & Flow Control Assembly
  • Back Pressure Line / Return Line
  • Flow Meter (Optional)
  • Control Panel (PLC / VFD Based)        

      Applications

  • Biogas Digesters (CSTR, Plug Flow, Semi Continuous)
  • Sewage Treatment Plants (Anaerobic digesters)
  • Industrial Effluent Treatment Digesters
  • Food & Dairy Waste Digesters

      Benefits

  • Enhances biogas production
  • Prevents sludge accumulation & hard settling
  • Extends digester life and reduces maintenance
  • Improves digestion efficiency
  • Low operational energy consumption
  • Ensures consistent process stability