Task
Construction of an anaerobic wastewater treatment plant for the production of biogas from sugar production wastewater.
Design data
Waste water volume:
- 125 m³/h
Solution & implementation
Our innovative process for producing biogas from beet wash water with a high sugar content is characterized by four key process steps.
- Pre-acidification of the beet wash water: The first step is to pre-acidify the sugar-rich beet wash water. This forms the basis for the efficient process.
- Special ALMA BHU GMR - insensitive to calcium: In the second step, the pre-acidified beet wash water enters our specially developed ALMA BHU GMR (gas mixing reactor). This reactor was specially designed for wastewater with high calcium concentrations and is characterized by its robust design and mode of operation, which is insensitive to calcium deposits.
- Optimization through biomass recirculation: The biomass is separated and partially recirculated in a downstream sludge thickener. This not only leads to an increased biogas yield, but also enables more efficient mixing of the reactor.
- Biogas treatment and utilization: The biogas obtained undergoes thorough drying and desulphurization. We have also installed a biogas flare and heat exchangers. The heat exchangers ensure a constant temperature of 37 °C in the biogas reactor in order to provide the methanogenic bacteria with optimum conditions for the efficient conversion of the COD.
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