Anaerobic Treatment

The anaerobic treatment has recently become a very common technology for treatment of heavily polluted wastewater. It has several advantages over the aerobic technologies:

  • much less sludge is produced in anaerobic methods,
  • energy saving: no saturation and production of high calorie biogas, which can be transformed into heat or electric power, depending on the size of the plant.

technologie beztlenowe

PPEKO offers a wide range of anaerobic technologies for wastewater treatment and sludge processing:

 a)   Anaerobic technologies for industrial wastewater:

  • Anubix-B – high rate modified UASB reactors using flocculated and granulated sludge with COD load range 10-15 kgCOD/m3;
  • Anubix-T – innovative, ultra high rate tower reactors with possible COD load range 15-35 kgCOD/m3;
  • AnaeroMem™ - anaerobic membrane reactor, appropriate for small wastewater treatment plants.

b)   Technologies for wastewater with high fat and suspended solids content:

  • Anubix-C – used for wastewater with high TSS content; modified UASB reactors, using the flocculated sludge with COD load range 5-10 kgCOD/m3;
  • FlotaMet™ - for wastewaters containing significant amounts of fat/and suspended solids; tower reactors using the biogas flotation with COD load range 3-7 kgCOD/m3;
  • Anamix – for wastewaters with high fat/and suspended solids content, completely mixed reactors with working temperature range 35-60°C (meso- and thermophilic processes).

c)   Sludge: a number of technologies for sludge fermentation, including AnaeroDG™, Raptor™ and Thearex™

 

The effluent can be discharged to the river only after going through an aerobic-stage polishing system, e.g. AGAR® or AeroMem®. There is also a possibility to use the membrane systems – MF/UF/NF to close the water circulation systems after the anaerobic reactor.

 

Principle of Operation

Anaerobic treatment is based on microbiological processes, in particular on methane fermentation. Several groups of bacteria convert the organic compounds polluting the wastewater into biogas: a mixture of methane and CO2. These groups of bacteria inhabit the anaerobic sludge, both flocculated and granulated.

 

Advantages:

  • space saving construction;
  • low chemicals use;
  • lowest operating cost;
  • biogas production / energy cogeneration systems