A5034030842- Wastewater Treatment and Nitrogen Removal
- Water Treatment and Disinfection
- Constructed Wetlands for Wastewater Treatment
- Microbial Fuel Cells and Bioremediation
- Membrane Separation Technologies
- Methane Hydrates and Related Phenomena
- Ammonia Synthesis and Nitrogen Reduction
- Microbial Community Ecology and Physiology
- Calcium Carbonate Crystallization and Inhibition
- CO2 Sequestration and Geologic Interactions
- Tracheal and airway disorders
- Minerals Flotation and Separation Techniques
- Crystallization and Solubility Studies
- Advanced Data Processing Techniques
- Aeolian processes and effects
- Additive Manufacturing and 3D Printing Technologies
- Landfill Environmental Impact Studies
- Subcritical and Supercritical Water Processes
- African Botany and Ecology Studies
- Chemical Synthesis and Characterization
- Anaerobic Digestion and Biogas Production
- Agroforestry and silvopastoral systems
- Lignin and Wood Chemistry
- Natural Fiber Reinforced Composites
- Agriculture Sustainability and Environmental Impact
University of Tartu
2015-2025
Linnaeus University
2019
The main issues with mainstream anammox application are loss of bacterial activity by low temperatures and a high organic content wastewater. We demonstrate novel switching method between sidestream wastewater flow was switched (reject water at >22°C) (municipal 16.5°C), so that the biomass growth could benefit from conditions. Real (biogas plant effluent) (≈1000 mg NH+ 4-N L−1) synthetic wastewater-like source) (≈100 4-N) were used for 20 L biofilm reactor feeding. highest total nitrogen...
Biological nutrient removal from wastewater to reach acceptable levels is needed protect water resources and avoid eutrophication. The start-up of an anaerobic ammonium oxidation (anammox) process scratch was investigated in a 20 L sequence batch reactor (SBR) inoculated with mixture aerobic sludge at 30 ± 0.5 °C hydraulic retention time (HRT) 2–3 days. use NH4Cl, NaNO2, reject as nitrogen sources created different salinity periods, which the anammox performance assessed: low (<0.2 g...
Pyrolysis is a promising way to reuse of waste tires. However, the carbon black generated in process often contaminated with various pyrolysis products. This study aims recycle low-quality recycled (rCB) from tire pyrolysis, addressing challenges posed by organic residues (up 5 wt% bituminous substances, 112.2 mg/kg PAH). causes agglomeration particles and decreases active specific surface area. Cavitational vortex milling (both wet dry) emerges as method valorize rCB, allowing for...
The influence of temperature in a range 15–5°C, fluctuations soluble chemical oxygen demand (sCOD) and suspended solids (SS) the influent also long hydraulic retention times (HRT) 36 or 50 d on performance laboratory septic tank were studied. A laboratory-scale with volume 20 L, started up at 15°C was fed domestic wastewater from two settlements sCOD to 450 2,000 mg/L, respectively. efficiency assessed based pollutant removal biogas production. stepwise decrease by 5°C 15–5°C halved daily...
The nitritation–anaerobic ammonium oxidation (anammox) process was studied for the first time using an oxidation–reduction potential (ORP) decrease rate control in anammox sequencing batch reactor (SBR). SBR inoculated and fed with high-strength N-rich real reject wastewater (containing average of 740 mg NH4+-N/L) coming from a biogas plant. Start-up total nitrogen removal rates (TNRRs) 90 g N/[m3·day] (87 N/g VSS/day) achieved shortly at 25°C within 132-day operation period. However, during...
In a moving bed biofilm reactor (MBBR) at moderate temperature of 20°C sulfate reduction along with ammonium oxidation were established. an upflow anaerobic sludge blanket (UASBR), the same process took place 36°C. Sulfate-reducing (SRAO) was performed using reject water as substrate for micro-organisms and source , being added electron acceptor. Bacterial strains belonging to phylum Planctomycetales detected from MBBR; UASBR species representing Verrucomicrobia found. Average volumetric TN...
The anaerobic ammonium oxidation (anammox) and nitritation-anammox (deammonification) processes are widely used for N-rich wastewater treatment. When deammonification applications move towards low temperature (mainstream has temperature), effect to be studied. In current research, in a moving bed biofilm reactor maximum total nitrogen removal rate (TNRR) of 1.5 g N m−2 d−1 (0.6 kg m−3 d−1) was achieved. Temperature gradually lowered by 0.5°C per week, similar TNRR sustained at 15°C during...
HydroThermal Liquefaction (HTL) is a process that involves the reaction of polymer compounds such as cellulose, lignin, synthetic plastics, etc. with near-critical or supercritical water to form low molecular weight liquid compounds, similar natural oil which believed have formed over millions years. Compared other biomass recovery methods pyrolysis anaerobic digestion, HTL highly efficient an energy efficiency up 90%, while others only around 30%. However, traditional requires extremely...
North Africa, including the Sahara Desert, was historically forested, but over past 10,000 years, region has undergone significant desertification due to climate change and human activity. The use of wood for heating grazing destroyed grass cover, which replaced by shrubby vegetation. slow-growing nature forest flora, often taking thousands years mature, hindered natural regeneration, accelerating desert expansion. Today, encroachment is a critical issue, exacerbated intensive farming...
Maintaining stability of low concentration (<1 g L−1) floccular biomass in the nitritation-anaerobic ammonium oxidation (anammox) process sequencing batch reactor (SBR) system for treatment high COD (>15,000 mg O2 to N (1680 ratio real wastewater streams coming from food industry is challenging. The anammox was suitable yeast factory containing relatively and abruptly increased organic C/N dissolved oxygen (DO) concentrations. Maximum specific total inorganic nitrogen (TIN) loading removal...
Anaerobic ammonium oxidation (anammox) has been studied extensively while no widely accepted optimum values for nitrite (both a substance and inhibitor) determined. In the current paper, spiking (abruptly increasing concentration in reactor over 20 mg NO−2-NL−1) effect on anammox process was three systems: moving bed biofilm (MBBR), sequencing batch (SBR) an upflow anaerobic sludge blanket (UASB). The inhibition thresholds concentrations causing 50% of biomass activity decrease (IC50) were...
The anaerobic ammonium oxidation (anammox) process is widely used for N-rich wastewater treatment. In the current research deammonification reactor in a reverse order (first anammox, then nitrifying biofilm cultivation) was started up with high maximum N removal rate (1.4 g m−2 d−1) moving bed reactor. Cultivated total nitrogen rates were accelerated most by anammox intermediate – nitric oxide (optimum 58 mg NO-N L−1) addition. Furthermore, NO added to eliminate inhibition caused nitrite...
Start-up of autotrophic ammonia oxidation process for removal nitrogen from low C:ANN ratio (<1) wastewaters is complicated due to needs specific inoculation material and strict control. Anaerobic ammonium (Anammox) was started up zero at 26°C in moving bed biofilm reactor by using the reject water as a feed medium source anammox bacteria. Efficient observed 270 days (average total [TN] rate 0.5 kgN/(m3d); TN efficiency 80%). The highest 1 kgN/(m3d) obtained with hydraulic retention time...
A biofilm with high nitrifying efficiency was converted into a nitritating and thereafter nitritating-anammox in moving-bed reactor at 26.5 (+/- 0.5) degrees C by means of combination intermittent aeration, low dissolved oxygen concentration, hydraulic retention time, free ammonia furthermore, also elevated HCO3- concentration. Nitrite-oxidizing bacteria (NOB) were more effectively suppressed an enhanced concentration range 1200-2350 mg/L as opposed to free-ammonia-based process control...
Deammonification via intermittent aeration in biofilm process for the treatment of sewage sludge digester supernatant (reject water) was started up using two opposite strategies. Two moving-bed reactors were operated 2.5 years at 26 (+/- 0.5 degree C with spiked influent(and hence free ammonia (FA)) addition. In first start-up strategy, an enrichment anammox biomass established, followed by development nitrifying system (R1). contrast, second strategy aimed organisms into a (R2). The most...