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DatoValore
TitleIntegrating biodegradation and ozone-catalysed oxidation for treatment and reuse of biomass gasification wastewater
AbstractSyngas purification via wet-scrubbing processes generates a relevant amount of wastewater, which requires proper treatments before its disposal or reuse. Integrating chemical with cost-saving biological approaches represent a valuable alternative to traditional chemical-physical treatments. This study investigated the effectiveness of the BIO&CHEM treatment scheme for the treatment and reuse of wastewater collected from a wet-scrubber unit (chemical oxygen demand, COD = 2600 mg/L) containing several hazardous pollutants such as phenol (110 mg/L) and xylene (64 mg/L). The BIO&CHEM system included a sequencing batch biofilter granular reactor (SBBGR) and an ozonation unit that were operated at different hydraulic retention times (HRTs, from 5 to 1 day) and transferred ozone doses (TODs, 400, 280 and 250 mg/L), respectively. When a 4 d-HRT was selected, biologically treated wastewater was characterized by a COD of 140 mg/L and its toxicity on Daphnia magna was decreased from 100% to 5%. The integration between the biological SBBGR-based treatment (HRT = 1.5 d) and the ozonation (TOD = 280 mg/L) lowered effluent COD to 33 mg/L and erased toxicity on Daphnia magna. This operating condition resulted the most sustainable enabling multiple wastewater reuse and a significant reduction of plant size comparing with the biological treatment. Furthermore, the investigated aromatic and polyaromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs; including benzene, toluene, xylene and phenol) were completely removed. The analysis of the reactor biomass, performed at the end of the experimental trial, excluded also their mere accumulation within the reactor due to absorption or adsorption on the sludge.
SourceJournal of Water Process Engineering 43
KeywordsGasification wastewaterBiological treatmentOzoneWater recyclingWet-scrubbing
JournalJournal of Water Process Engineering
EditorElsevier, Oxford/England,
Year2021
TypeArticolo in rivista
DOI10.1016/j.jwpe.2021.102297
AuthorsSgherza D.; Pentassuglia S.; Altieri V.G.; Mascolo G.; De Sanctis M.; Di Iaconi C.
Text458557 2021 10.1016/j.jwpe.2021.102297 Scopus 2 s2.0 85114680275 Gasification wastewater Biological treatment Ozone Water recycling Wet scrubbing Integrating biodegradation and ozone catalysed oxidation for treatment and reuse of biomass gasification wastewater Sgherza D.; Pentassuglia S.; Altieri V.G.; Mascolo G.; De Sanctis M.; Di Iaconi C. CNR Water Research Institute, Via F. De Blasio 5, Bari, 70132, CNR Water Research Institute, Via F. De Blasio 5, 70132 Bari, Italy, , Italy Syngas purification via wet scrubbing processes generates a relevant amount of wastewater, which requires proper treatments before its disposal or reuse. Integrating chemical with cost saving biological approaches represent a valuable alternative to traditional chemical physical treatments. This study investigated the effectiveness of the BIO CHEM treatment scheme for the treatment and reuse of wastewater collected from a wet scrubber unit chemical oxygen demand, COD = 2600 mg/L containing several hazardous pollutants such as phenol 110 mg/L and xylene 64 mg/L . The BIO CHEM system included a sequencing batch biofilter granular reactor SBBGR and an ozonation unit that were operated at different hydraulic retention times HRTs, from 5 to 1 day and transferred ozone doses TODs, 400, 280 and 250 mg/L , respectively. When a 4 d HRT was selected, biologically treated wastewater was characterized by a COD of 140 mg/L and its toxicity on Daphnia magna was decreased from 100% to 5%. The integration between the biological SBBGR based treatment HRT = 1.5 d and the ozonation TOD = 280 mg/L lowered effluent COD to 33 mg/L and erased toxicity on Daphnia magna. This operating condition resulted the most sustainable enabling multiple wastewater reuse and a significant reduction of plant size comparing with the biological treatment. Furthermore, the investigated aromatic and polyaromatic hydrocarbons PAHs and volatile organic compounds VOCs; including benzene, toluene, xylene and phenol were completely removed. The analysis of the reactor biomass, performed at the end of the experimental trial, excluded also their mere accumulation within the reactor due to absorption or adsorption on the sludge. 43 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85114680275 origin=inward Integrating biodegradation and ozone catalysed oxidation for treatment and reuse of biomass gasification wastewater Articolo pubblicato Sgherza Pentassuglia et al. 2021.pdf Articolo in rivista Elsevier Journal of Water Process Engineering Journal of Water Process Engineering ALTIERI VALERIO GUIDO SGHERZA DAMIANO PENTASSUGLIA SIMONA claudio.diiaconi DI IACONI CLAUDIO marco.desanctis DE SANCTIS MARCO giuseppe.mascolo MASCOLO GIUSEPPE