Anaerobic treatment

Many advantages

Anaerobic biological wastewater treatment has some obvious advantages: no aeration required, less sludge produced and energy captured from methane gas production.

So, why is anaerobic treatment not used more often?

– Unfortunately, the process is very sensitive to influent conditions and disturbances. This sensitivity is due to the extremely slow growth of the methane-producing microorganisms that are archaea, and not bacteria. Thus, diluted, cold or toxic wastewaters are usually not well suited to an anaerobic biological treatment strategy.

The perfect solution

However, the highly concentrated effluents from sugar refineries, breweries, juice plants and dairies can be ideal wastewaters for anaerobic treatment methods. In addition, AnoxKaldnes has developed and applied an anaerobic process that completely removed chlorate from wastewater.

Digestion of solid waste with a high dry solids content of up to 30% is another specialty anaerobic treatment activity for AnoxKaldnes. Mixing is a critical aspect of the process but the AnoxKaldnes“rotating tombola” (drums) fulfill the requirements.