Enhancement of aerobic biodegradability potential of municipal waste activated sludge by ultrasonic aided bacterial disintegration
| Autor: | S. Kavitha, J. Rajesh Banu, A. Sally Gloriana, G.M. Jessin Brindha, Ick Tae Yeom, K. Rajashankar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Environmental Engineering medicine.medical_treatment Sonication Sewage Bioengineering 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Extracellular polymeric substance 010608 biotechnology medicine Food science Amylase Waste Management and Disposal 0105 earth and related environmental sciences Protease Waste management biology Renewable Energy Sustainability and the Environment business.industry Chemistry General Medicine Biodegradation Biodegradation Environmental Activated sludge biology.protein Degradation (geology) business |
| Zdroj: | Bioresource Technology. 200:161-169 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2015.10.026 |
| Popis: | An investigation was performed to study the influence of ultrasonic aided bacterial disintegration on the aerobic degradability of sludge. In first phase of the study, effective floc disruption was achieved at an ultrasonic specific energy input of 2.45kJ/kg TS with 44.5mg/L of Extracellular Polymeric Substance (EPS) release including 0.035U/mL and 0.025U/mL protease and amylase activity respectively. In second phase, experimental outcomes revealed bacterial disintegration of floc disrupted-sludge showing a maximum solubilization of about 23% and was observed to be superior to bacterially disintegrated (11%) and control (6%), respectively. The result of aerobic biodegradability of ultrasonic aided bacterially pretreated sludge showed volatile solids (VS) degradation of about 40.2%. The kinetic study of aerobic biodegradability through non linear regression modelling reveals that floc disrupted sludge showed better biodegradability with decay constant of about 0.19d(-1) relatively higher than the control (0.14d(-1)) and bacterially disintegrated (0.17d(-1)) sludges. |
| Databáze: | OpenAIRE |
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