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Improvement of Upflow Anaerobic Sludge Bed Performance Using Chitosan
Chitosan, with a degree of deacetylation of 85% and a molecular weight of 2.5 × 10 5 Da, yielding high flocculation efficiency (85 to 100% flocculation) and a broad flocculation region (2 to 45 mg/g suspended solids), was selected for accelerating granulation in a 30‐L upflow anaerobic sludge bed (UASB) used to treat wastewater from a tropical fruit‐processing industry. Compared with other studies, smaller amounts of chitosan were applied (two injections with 2 mg chitosan/g suspended solids in the reactor at each injection). Comparison with the UASB without chitosan addition, the UASB had a 24 to 37% larger particle size and a 6 to 41% longer solids retention time. In addition, the reactor performances were also enhanced. The UASB with chitosan addition had a 9 to 59% lower effluent chemical oxygen demand (COD), 4 to 10% higher COD removal, up to 35% higher biogas production rate, and a 16 to 68% lower biomass washout. The paired t‐test analysis indicated that these performance parameters were significantly different (P < 0.05).
Improvement of Upflow Anaerobic Sludge Bed Performance Using Chitosan
Chitosan, with a degree of deacetylation of 85% and a molecular weight of 2.5 × 10 5 Da, yielding high flocculation efficiency (85 to 100% flocculation) and a broad flocculation region (2 to 45 mg/g suspended solids), was selected for accelerating granulation in a 30‐L upflow anaerobic sludge bed (UASB) used to treat wastewater from a tropical fruit‐processing industry. Compared with other studies, smaller amounts of chitosan were applied (two injections with 2 mg chitosan/g suspended solids in the reactor at each injection). Comparison with the UASB without chitosan addition, the UASB had a 24 to 37% larger particle size and a 6 to 41% longer solids retention time. In addition, the reactor performances were also enhanced. The UASB with chitosan addition had a 9 to 59% lower effluent chemical oxygen demand (COD), 4 to 10% higher COD removal, up to 35% higher biogas production rate, and a 16 to 68% lower biomass washout. The paired t‐test analysis indicated that these performance parameters were significantly different (P < 0.05).
Improvement of Upflow Anaerobic Sludge Bed Performance Using Chitosan
Lertsittichai, Sittpong (Autor:in) / Lertsutthiwong, Pranee (Autor:in) / Phalakornkule, Chantaraporn (Autor:in)
Water Environment Research ; 79 ; 801-807
01.07.2007
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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