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ANUBIX™ – T Expanded Granular Sludge Bed (EGSB) System

ANUBIX™ – T is an ultra-high loading-rate system utilizing expanded granular sludge bed (EGSB) technology. It is suited for high-strength wastewaters with COD (Chemical Oxygen Demand) values of up to around 25,000 mg/l, with low suspended solids (TSS) and fat, oil and grease (FOG) content.

Anaerobic digestion of organic matter takes place in the ANUBIX™ – T anaerobic reactor. Organic compounds (such as sugars) are primarily degraded by anaerobic bacteria (activated anaerobic sludge) and converted into biogas (a mixture of methane and carbon dioxide). Only a small amount of sludge growth takes place at this stage.

Advantages of the ANUBIX™ – T (EGSB) system:

  • Works with granular sludge and achieves high industrial wastewater treatment efficiencies;
  • Superior treatment with low effluent soluble COD/BOD concentrations requires smaller aerobic polishing stage;
  • Solid, corrosion-resistant construction that is easily accessible for inspection;
  • Operating interruptions are minimized due to lack of moving parts inside of the reactor;
  • Additional gas holder is not required;
  • For your convenience and optimal land development we offer steel or concrete construction, rectangular or round configurations;
  • Fast startup of the system;
  • Very small footprint of the installation.

Industries and applications: as an anaerobic treatment of the various industrial wastewater streams, including breweries, soft drinks & other beverages production, paper mills, starch production, and many more.

How does ANUBIX™ – T work?

In a typical plant, wastewater is first screened and then collected in a buffer tank equipped with an agitator. This tank is designed to allow sufficient qualitative and quantitative equalization and to acidify the wastewater partially. This allows for more stable operation and better sludge quality in the next stage: the ANUBIX™ – T anaerobic reactor. Provisions will be made for pre-settling of solids, heating, cooling, CO2 degasification, and inline neutralization if required as part of the overall process.

After passing through the second layer of anaerobic sludge (the so-called “sludge blanket”) the wastewater passes through the internal three-phase separator device at the top of the reactor.

The modular separator units are built-in stainless steel and GRP (Glass Reinforced Plastic) and are equipped with an additional cross-flow type parallel plate separator that ensures retention of even the smallest flocs of methanogenic sludge.

The clarified effluent leaves the reactor through a central collecting pipe. Biogas is collected at the top and conveyed for either further upgrading via scrubbing and drying, after which it can be fed to a utilization system such as an engine genset or boiler. Excess biogas is sent to an emergency flare.

At the project design phase, additional provisions can be foreseen for pre-settling of solids, heating, cooling, CO2 degasification, and inline neutralization, if required. The ANUBIX™ – T reactor is capable of handling very high loading rates of up to 25 kg COD/m³.d, depending on the type of wastewater.

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