| Authors | Pérez-Elvira, S.I., Fdz-Polanco, F., Tomei, M.C., Bertanza, G., Braguglia, C.M., Gianico, A., Carrère, H. |
| Text | 458537 2017 anaerobic digestion enhanced sludge stabilization excess sludge production minimisation of sludge production pre treatments sludge impact reduction Reducing the impact of sludge Perez Elvira, S.I., Fdz Polanco, F., Tomei, M.C., Bertanza, G., Braguglia, C.M., Gianico, A., Carrere, H. Department of Chemical Engineering and Environmental Technology. University of Valladolid, C/ Dr. Mergelina, s/n, 47011 Valladolid, Spain Water Research Institute CNR, Via Salaria km 29, 00015 Monterotondo Stazione Roma Italy Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia, Italy INRA, UR0050, Laboratoire de Biotechnologie de l Environnement LBE , 102 Avenue des Etangs 11 100 Narbonne, France The treatment and disposal of excess sludge represents a bottleneck of wastewater treatment plants all over the world, due to environmental, economic, social and legal factors. There is therefore a growing interest in developing technologies to reduce the wastewater sludge generation. The goal of this paper is to present the state of the art of current minimisation techniques for reducing sludge production in biological wastewater treatment processes. An overview of the main technologies is given considering three different strategies The first option is to reduce the production of sludge by introducing in the wastewater treatment stage additional stages with a lower cellular yield coefficient compared to the one corresponding to the activated sludge process lysis cryptic growth, uncoupling and maintenance metabolism, predation on bacteria, anaerobic treatment . The second choice is to act on the sludge stage. As anaerobic digestion is the main process in sewage sludge treatment for reducing and stabilising the organic solids, two possibilities can be considered introducing a pre treatment process before the anaerobic reaction physical, chemical or biological pre treatments , or modifying the digestion configuration two stage and temperature phased anaerobic digestion, sequential anaerobic aerobic digestion, anoxic gas flotation . And, finally, novel developments in final sludge removal are presented, such as the combination of wet oxidation and anaerobic digestion. Innovative Wastewater Treatment Resource Recovery Technologies Impacts on Energy, Economy and Environment. IWA Publishing 9781780407869 Published version Capitolo Contributo in volume camillamaria.braguglia BRAGUGLIA CAMILLA MARIA andrea.gianico GIANICO ANDREA mariaconcetta.tomei TOMEI MARIA CONCETTA |
