| Title | Integration of an innovative biological treatment with physical or chemical disinfection for wastewater reuse |
| Abstract | In the present paper, the effectiveness of a Sequencing Batch Biofilter Granular Reactor (SBBGR) and its integration with different disinfection strategies (UV irradiation, peracetic acid) for producing an effluent suitable for agricultural use was evaluated. The plant treated raw domestic sewage, and its performances were evaluated in terms of the removal efficiency of a wide group of physical, chemical and microbiological parameters. The SBBGR resulted really efficient in removing suspended solids, COD and nitrogen with an average effluent concentration of 5, 32 and 10 mg/L, respectively. Lower removal efficiency was observed for phosphorus with an average concentration in the effluent of 3 mg/L. Plant effluent was also characterized by an average electrical conductivity and sodium adsorption ratio of 680 ?S/cm and 2.9, respectively. Therefore, according to these gross parameters, the SBBGR effluent was conformed to the national standards required in Italy for agricultural reuse. Moreover, hygienization performances of the SBBGR was higher than that of conventional municipal wastewater treatment plants and met the quality criteria suggested by WHO (E. coli < 1000 CFU/100mL) for agricultural reuse. In particular, the biological treatment by SBBGR removed 3.8 ? 0.4 log units of Giardia lamblia, 2.8 ? 0.8 log units of E. coli, 2.5 ? 0.7 log units of total coliforms, 2.0 ? 0.3 log units of Clostridium perfringens, 2.0 ? 0.4 log units of Cryptosporidium parvum and 1.7 ? 0.7 log units of Somatic coliphages. The investigated disinfection processes (UV and peracetic acid) resulted very effective for total coliforms, E. coli and somatic coliphages. In particular, a UV radiation and peracetic acid doses of 40 mJ/cm2 and 1 mg/L respectively reduced E. coli content in the effluent below the limit for agricultural reuse in Italy (10 CFU/100 mL). Conversely, they were both ineffective on Clostridium perfringens spores. |
| Source | Science of the total environment 543, pp. 206–213 |
| Keywords | DisinfectionBiofilterEscherichia coliGiardia lambliaVirus. |
| Journal | Science of the total environment |
| Editor | Elsevier, Lausanne ;, Paesi Bassi |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.scitotenv.2015.11.006 |
| Authors | Marco De Sanctis, Guido Del Moro, Caterina Levantesi, Maria Laura Luprano, Claudio Di Iaconi. |
| Text | 338526 2016 10.1016/j.scitotenv.2015.11.006 Scopus 2 s2.0 84946866297 ISI Web of Science WOS WOS 000367635600024 Disinfection Biofilter Escherichia coli Giardia lamblia Virus. Integration of an innovative biological treatment with physical or chemical disinfection for wastewater reuse Marco De Sanctis, Guido Del Moro, Caterina Levantesi, Maria Laura Luprano, Claudio Di Iaconi. Water Research Institute, IRSA CNR, Via F. De Blasio 5, 70123 Bari, Italy. Water Research Institute, IRSA CNR, Via F. De Blasio 5, 70123 Bari, Italy. Water Research Institute, IRSA CNR, Via Salaria Km 29.600, 00015 Monterotondo RM , Italy. Water Research Institute, IRSA CNR, Via Salaria Km 29.600, 00015 Monterotondo RM , Italy. Water Research Institute, IRSA CNR, Via F. De Blasio 5, 70123 Bari, Italy. In the present paper, the effectiveness of a Sequencing Batch Biofilter Granular Reactor SBBGR and its integration with different disinfection strategies UV irradiation, peracetic acid for producing an effluent suitable for agricultural use was evaluated. The plant treated raw domestic sewage, and its performances were evaluated in terms of the removal efficiency of a wide group of physical, chemical and microbiological parameters. The SBBGR resulted really efficient in removing suspended solids, COD and nitrogen with an average effluent concentration of 5, 32 and 10 mg/L, respectively. Lower removal efficiency was observed for phosphorus with an average concentration in the effluent of 3 mg/L. Plant effluent was also characterized by an average electrical conductivity and sodium adsorption ratio of 680 S/cm and 2.9, respectively. Therefore, according to these gross parameters, the SBBGR effluent was conformed to the national standards required in Italy for agricultural reuse. Moreover, hygienization performances of the SBBGR was higher than that of conventional municipal wastewater treatment plants and met the quality criteria suggested by WHO E. coli < 1000 CFU/100mL for agricultural reuse. In particular, the biological treatment by SBBGR removed 3.8 0.4 log units of Giardia lamblia, 2.8 0.8 log units of E. coli, 2.5 0.7 log units of total coliforms, 2.0 0.3 log units of Clostridium perfringens, 2.0 0.4 log units of Cryptosporidium parvum and 1.7 0.7 log units of Somatic coliphages. The investigated disinfection processes UV and peracetic acid resulted very effective for total coliforms, E. coli and somatic coliphages. In particular, a UV radiation and peracetic acid doses of 40 mJ/cm2 and 1 mg/L respectively reduced E. coli content in the effluent below the limit for agricultural reuse in Italy 10 CFU/100 mL . Conversely, they were both ineffective on Clostridium perfringens spores. 543 Published version https //www.sciencedirect.com/science/article/pii/S0048969715309876 via%3Dihub Integration of an innovative biological treatment with physical or chemical disinfection for wastewater reuse De_Sanctis_et_al_2016_STOTEN.pdf Articolo in rivista Elsevier 0048 9697 Science of the total environment Science of the total environment Sci. total environ. LUPRANO MARIA LAURA claudio.diiaconi DI IACONI CLAUDIO caterina.levantesi LEVANTESI CATERINA marco.desanctis DE SANCTIS MARCO guido.delmoro DEL MORO GUIDO WATER4CROPS Integrating bio treated wastewater with enhanced water use efficiency to support the Green Economy in EU and India |
