A5067844631- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Integrated Water Resources Management
- Peatlands and Wetlands Ecology
- Groundwater and Isotope Geochemistry
- Environmental Science and Water Management
- Water Quality and Pollution Assessment
- Soil erosion and sediment transport
- Wastewater Treatment and Reuse
- Municipal Solid Waste Management
- Marine and coastal ecosystems
- Wastewater Treatment and Nitrogen Removal
- Freshwater macroinvertebrate diversity and ecology
- Phosphorus and nutrient management
- Recycling and Waste Management Techniques
- Microplastics and Plastic Pollution
- Water Quality Monitoring Technologies
- Soil Carbon and Nitrogen Dynamics
- Historical Studies and Socio-cultural Analysis
- Bioenergy crop production and management
- Social Acceptance of Renewable Energy
- Algal biology and biofuel production
- Land Use and Ecosystem Services
- Oil Spill Detection and Mitigation
- Aquatic Ecosystems and Phytoplankton Dynamics
Tallinn University of Technology
2011-2023
In the present study, feasibility of microalgae production coupled with wastewater treatment was assessed. Continuous cultivation Chlorella sorokiniana tested in lab-scale flat-panel photobioreactors. Nitrogen and phosphorus removals were found to be inversely proportional four dilution rates, while chemical oxygen demand removal 50% at all conditions. The biomass obtained highest rate characterized for its content lipids, proteins pigments. average yields fatty acid methyl esters (FAMEs),...
Summary 1. The main objectives of our study were (i) to establish the relative impact pressures that degrade ecological status, especially those caused by agriculture and urbanisation, (ii) identify regional patterns in these pressure‐impact relationships (iii) evaluate weight acting at basin riparian corridor scales, possible buffering effect areas. 2. We developed large‐scale models linking invertebrate indices quality river land cover France, Slovakia, Estonia U.K. Invertebrate indices,...
Abstract In this study we investigated the phosphorus (P) content of Baltic soils. first set analyses, 99 soil samples from states and Sweden (soil 1, representing seven different catchments or experimental plots) were analysed for P using four extraction methods: ammonium lactate (P AL ), double DL Mehlich 3 M3 ) carbonate Olsen ( r = 0.85–0.97). absolute values, results M3, gave means 71, 61 20%, respectively, value method. Significantly relationships found between concentrations pH...
The aim of the study was assessment changes in nutrient concentrations Estonian rivers as a response to improved wastewater treatment and substantial reductions use fertilisers number livestock during past 15–20 years. A Mann–Kendall test flow adjusted technique assess recent trends have been used. Statistical analysis covered time series 53 sampling sites on 40 streams different hydro-geographical regions varying human pressures. results indicate statistically significant downward trend...
Rivers are important ecosystems, vital to the livelihoods of hundreds millions humans and other species. Despite their environmental, social, economic importance, current use rivers is unsustainable, due a combination solid waste high levels pollutants. Plastic materials among most predominant such Based on need for additional research in this area, study examines pressures put explores trends related riverine plastic pollution, with focus Asia. Apart from bibliometric analysis, relying...
This paper in a uniform manner examines temporal trends phosphorus (P) concentrations and losses from small well-monitored agricultural catchments the Nordic Baltic countries. Thirty-four (range 0.1–33 km2) Norway (8), Denmark (5), Sweden Finland (4), Estonia (3), Latvia (3) Lithuania were selected for study. The time series ranged 10 (2002–2011) to 21 years (1989–2009). monthly P concentration loss tested significant monotone (p < 0.05; two-sided test) using partial Mann–Kendall test with...
Nitrogen (N) and phosphorus (P) losses via agricultural drainage water have negative impacts on receiving bodies large-scale programmes to reduce nutrient been established in the Nordic Baltic countries, together with catchment monitoring programmes. This study evaluated time series (9–40 years) of data from 34 selected Nordic-Baltic catchments for spatial temporal variations area-specific discharge (mm) concentrations transport total nitrogen (TN) (TP). Water varied 125 mm (Denmark) > 1000...
Abstract Chemical pollution poses a threat to the aquatic environment and human health. Wastewater treatment plants are last defensive line between emissions of pollutants. This study focuses on identification most relevant hazardous substances in Estonian municipal wastewater their fate process. During this study, seasonal sewage sludge samples were collected from nine analyzed for 282 substances, including EU (n = 45) 31) priority substances. Results show that several subject international...
Qualitative or quantitative description of the future by developing scenarios is a key method when taking long-term view, e.g., up to 2050. Previously time frames covered have usually been no more than 20 years. This period can be too short for achieving goals when, example, testing watershed management plans. paper an attempt introduce and illustrate potential Story-and-Simulation methodology Fuzzy Cognitive Mapping drawing qualitative semi-quantitative Lake Peipsi, one largest surface...
Abstract This paper analyses factors associated with bulking in 195 small scale wastewater treatment plants (WWTPs) Estonia. Operational data from each plant were collected and analysed statistically. The key infiltration into sewage pipes, the type purpose of process reactor, operational practices influent characteristics. Both anaerobic fraction volumetric reactor compared to aerobic resulted a positive correlation sludge volume index (SVI) &lt;150 ml/g values. Good operation...