Based on mass and energy balance calculations, this work investigates the possibility of recovering heat nutrients (nitrogen phosphorus) from municipal sewage sludge using pyrolysis or combustion in combination with a gas scrubbing technology. Considering wastewater treatment plant (WWTP) 65,000 t/a mechanically dewatered digestate (29% total solids), 550 nitrogen 500 phosphorus were recovered ...

Co-digestion is the simultaneous digestion of two or more substrates and a common practice at wastewater treatment plants (WWTPs). The amounts methane digested sludge produced are key parameters for evaluating economic efficiency co-digestion. However, share dewatered digestate from co-substrates not known. Synergistic effects in co-digestion, i.e. better biodegradability compared to mono-diges...

This paper deals with thermal drying of wastewater sludges, whose management will become crucial in the forthcoming years. Sludges collected after mechanical dewatering in 5 different WWTPs are submitted to the same convective drying treatment in order to try finding some relations between the drying behaviours, the type of effluent and wastewater treatments. Results show dearly sludge drying r...

A process for the valorization of seagrass residues has been developed, aiming to investigate its potential as a phosphate adsorbent and production added-value products, which can be assessed in agricultural applications. Posidonia oceanica were thermally treated (500 °C, 1 h) tested an from real wastewater. Chemical leaching experiments dewatered anaerobic sludge (DWAS) conducted, evaluating s...

An improved technology for the local treatment of industrial wastewater a meat processing plant is proposed intensification cleaning processes and an increase in efficiency according to indicators: HSC, SPAR, phosphates, ammonium nitrogen, fats, obtaining purified water accordance with regulatory requirements at discharge into city sewer. According technology, after existing grease trap concent...

Adsorption of sulfur dioxide on carbonaceous materials has been extensively studied (1-18). Activated carbon and activated carbon fibers have been found to be efficient adsorbents for the low temperature removal of SO2. It is believed that sulfur dioxide is adsorbed with two adsorption energies on activated carbons (3-12). The low energy, about 50 kJ/mol, corresponds to weak physical adsorption...