After stringent European directives made direct discharge of treated wastewater into River Tisza, a tributary of the Danube, impossible, Alltech-Fermin opted to build a new wastewater treatment plant. H+E convinced and received the order for a new wastewater treatment plant in Senta.
Serbia 2008
Anaerobic-aerobic wastewater treatment for a yeast factory
Alltech-Fermin specializes in the production of natural yeast solutions for the Serbian and southern European markets, at its production site in Senta, North Serbia. The wastewater from this facility mainly contains high COD and BOD concentrations as well as significant amounts of nitrogen and phosphorus. After stringent European directives made direct discharge of treated wastewater into River Tisza, a tributary of the Danube, impossible, Alltech-Fermin opted to build a new wastewater treatment plant, utilizing modern and more efficient treatment technologies that were not available when the original wastewater treatment plant was built in 1979. That plant still existed but was no longer in an operational condition.
Anaerobic-aerobic wastewater treatment for a yeast factory
In 2008 H+E was awarded the contract for a new wastewater treatment plant in Senta. The anaerobic ANAFIT® high-load reactors of the EGSB type were designed for a maximum daily COD load of 44 tons and a COD degradation capacity of 70 to 80 percent. The nitrogen removal capacity is designed for a nitrogen load of 2,500 kilograms per day, whereas biogas production is at 12,000 tons per day. At the same time, heat and electricity are produced which cover the plant’s own power requirements for the most part.
Applied Process Combination
The installed process combination consists of an ANAFIT®.AC anaerobic treatment stage (including a buffer and preliminary acidification tank, conditioning tank and two reactors), a biogas line (storage, biological and chemical desulfurization, dryer, cogeneration unit and flare), a bio-P-stage for phosphorus removal, an aerobic treatment BIOFIT®.C, and SBR process for biological nitrogen removal, and, last but not least, a polishing stage that involves SBR reactor and a FLOCOPAC® unit for final removal of residual.
Facts & Figures
- Good energy balance by reusing biogas
- Severe reduction of greenhouse gases
- Reduction of bio solids of up to 90 percent
- 80 percent COD load reduction
- Cost reduction for ventilation and binding of free CO2
- 90 percent nitrogen load reduction