Effects of metabolic uncouplers on excess sludge reduction and microbial products of activated sludge
| Autor: | Hai-Lan Hu, Qin Minmin, Fang Fang, Jiashun Cao, Zhi-Rong Hu, Zhaoxia Xue |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Sewage Renewable Energy Sustainability and the Environment Uncoupling Agents Polyesters Intracellular storage Hydroxybutyrates Bioengineering General Medicine Polysaccharide Microbiology Polyhydroxybutyrate Protein content Ammonia chemistry.chemical_compound Bacteria Anaerobic Extracellular polymeric substance Activated sludge Biopolymers chemistry Food science Waste Management and Disposal Inhibitory effect |
| Zdroj: | Bioresource technology. 185 |
| ISSN: | 1873-2976 |
| Popis: | The present study investigated the influences of three metabolic uncouplers (pCP, oCP and oNP) on excess activated sludge reduction and microbial products of extracellular polymeric substances (EPS) and intracellular storage product (polyhydroxybutyrate, PHB) in short-term tests. Results showed sludge was reduced 58.2%, 59.8% and 80.8%, respectively, at pCP, oCP and oNP concentrations of 20mg/L. The dosage of three uncouplers had no obviously influences on COD removal and sludge settleability, but had significant inhibition effect on ammonia removal, especially for oNP. Low concentration of pCP and oNP (5mg/L) dosing resulted in protein and polysaccharide content increased in EPS, however, they were decreased at high pCP and oNP concentrations (>5mg/L). To oCP, the protein content in EPS was increased linearly with oCP concentration. Furthermore, metabolic uncouplers addition stimulated the production of PHB. Among three uncouplers, oCP could be an alternative uncoupler for sludge reduction in activated sludge process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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