Particulate COD Capture in an Aerobic Granular Sludge Bed

Aerobic granular sludge (AGS) is a revolution in the water treatment field, since it enables to simultaneously remove carbon, nitrogen, and phosphorus. Recently, the AGS studies mostly focus on the formation of granules, and the factors that influence the AGS morphology, like temperature and substrate type. In domestic wastewater, 85 % of total...

Evaluation of compounds generated in the thermal hydrolysis process on microbial activities in partial nitritation/anammox process

Anaerobic digestion (AD) is a traditional technique to treat sewage sludge and produce biogas. Thermal hydrolysis process (THP) is a feasible pretreatment for AD by improving the biodegrdability of organic compounds. Partial nitritation/anammox (PN/A) process could be applied in side-stream for treating the reject water from AD since the reject...

Denitrification-based pretreatment for the compaction of silty sands

Recent developments in bio-based soil improvement techniques include the use of the bacterially mediated process of denitrification to alter engineering properties of soils. Pham (2017) used the denitrification process to stimulate the production of gas and precipitation of calcium carbonate as a soil improvement method. The ability to...

Control of biological phosphorus removal in an oxidation ditch using simple sensors

Control of wastewater treatment plants has received more attention as a method to improve nutrient removal processes. Improved nutrient removal, results in an increased effluent quality, whilst minimising the energy consumption. Aeration control of oxidation ditches often focuses on adjusting the aeration intensity based on the nitrogen removal...

Performance of mineralwool as filter medium for the treatment of contaminated drain water in the urban context of Delhi, India

Delhi is facing a very rapid urbanization, making it difficult to keep up with the construction of sewerage and water treatment infrastructure. The LOTUSHR project was created to research alternative solutions to treat mixed water streams and prevent pollution flows from urban drains into the environment.<br/><br/>Biofiltration was identified as...

Rheological characterization of secondary sludge: impact of solid concentration and temperature

Rheological characterization of sludge is essential, since it is related to access sludge transportation and mixing performance, which is included in many processes in waste water treatment and sludge disposal. This study was carried out for characterizing the secondary sewage sludge after gravitational thickening from a Dutch wastewater...

The Freshwater Factory: removing organic micro-pollutants with ozonation

Removing organic micro-pollutants (OMPs) can enable wastewater reuse to alleviate pressure on fresh water sources. This research aims on the prediction of OMP removal efficiencies by ozonation and biofiltration based on experimental data sets and/or modelling. Comparison of experimental data on average OMP removal of three different studies from...

Phenolic Wastewater Degradation by Anaerobic Membrane Bioreactor in Thermophilic condition

Worm predation on excess activated sludge: Solids reduction capabilities and biochemical changes

Aerobic, anaerobic and worm predated sequential batch digestion experiments were performed on waste activated sludge in order to compare the mechanisms and performances of these three digestion processes. The Tubifex Tubifex specie was chosen to simulate the worm predation process.