1.

Improving the energy balance in brewing industry using waste yeast as an energy substrate

We used surplus yeast as an energy substrate in anaerobic digestion with granular biomass. We developed the reactor technology and managed to increase renewable energy use from 10 to 16,5 %.

F.09 Development of a new technological process or technology

COBISS.SI-ID: 4221210

2.

Veener industry wastewater treatment: from pilot experiments to industrial SBR plant

Laboratory-scale experiments were undertaken to determine appropriate design criteria for full-scale SBR process for the treatment of the veneer industry wastewater. Basic process challenges included highly variable (quality and quantity) influent with high temperature and colloids (black color). Laboratory studies indicated that biological treatment was not sufficient and must be combined with the chemical treatment in order to provide required effluent quality. The full-scale treatment plant was able to be constructed and built in short time period.

F.17 Transfer of existing technologies, know-how, methods and procedures into practice

COBISS.SI-ID: 3872282

3.

Influence of SRT on SBR performance

The influence of solid retention time on the denitrification/nitrification kinetics in SBR was evaluated. SBR1 was operated with the SRT of 20 days (MLSS = 3 g/L) and SBR2 was operated with the SRT of 52 days (MLSS = 11.6 g/L) and the SRT of 31 days (MLSS = 11.6 g/L). Activated sludge flocs with excellent settling properties were developed (SVI = 27 – 33 mg/L). Specific (volumetric) denitrification and nitrification rate and carbon elimination rate were much higher in the SBR systems with higher sludge concentration than in the SBR1 system.

B.03 Paper at an international scientific conference

COBISS.SI-ID: 3981082

4.

Nitrogen reduction in the SBR at high SRT

The SBR system with the mixture of flocculent and granular biomass is very efficient in the nitrogen removal from the wastewaters. Ammonia is oxidized to nitrate in the aerobic phase (nitrification) and nitrate is than removed in the anoxic phase (denitrification). Organic pollution from the wastewater is used as a substrate for the denitrification.

F.09 Development of a new technological process or technology

COBISS.SI-ID: 3872282

5.

Water treatment with flter material based on nano-particles

Results of the nano-filtration tests with microorganisms and heavy metals were presented. Results shows that the substantial amount of heavy metals could be removed with nano-filtration. Different combination of filtration materials with or without the addition of activated carbon were also tested.

F.10 Improvements to an existing technological process or technology

COBISS.SI-ID: 4279578