Performance of the ANAMMOX process using multi- and single-fed upflow anaerobic sludge blanket reactors
| Autor: | Ren-Cun Jin, Chen Shenxing, Jue Zhang, Li-Xin Guo, Qin Tianyue, Bao-Shan Xing |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Environmental Engineering
Time Factors Nitrogen Kinetics Bioengineering Heme Blanket Waste Disposal Fluid Biopolymers Bioreactors Ammonia Anaerobiosis Biomass Particle Size Waste Management and Disposal Chromatography Anaerobic sludge Sewage Renewable Energy Sustainability and the Environment Chemistry Substrate (chemistry) General Medicine Substrate concentration Biodegradation Environmental Chemical engineering Anammox Scientific method Process kinetics Volatilization Extracellular Space Oxidation-Reduction |
| Zdroj: | Bioresource technology. 149 |
| ISSN: | 1873-2976 |
| Popis: | highlights � The ANAMMOX performances of multi- and single-fed UASBs were compared. � The kinetic characteristics of multi- and single-fed UASBs were analyzed. � The stability of the two UASBs was assessed. � The properties of the ANAMMOX granules in the two UASBs were determined. abstract The performance of the ANAMMOX process was investigated in two identical laboratory-scale multi- and single-fed upflow anaerobic sludge blanket (UASB) reactors (denoted R1 and R0) at different hydraulic res- idence times (HRTs) varying from 2.06 to 1.52 h and NH þ 4 -Ninf concentrations ranging from 70 to 266 mg L � 1 . The substrate removal efficiencies of both reactors decreased as HRT decreased and NH þ 4 -Ninf increased. The kinetics of these reactions were analyzed, and the Stover-Kincannon model was appropriate to describe the process kinetics of the reactors. In addition, an empirical model incorpo- rating the influent substrate concentration and HRT adequately described R1. Shock experiments were conducted in which the reactors were subjected to transient shock loads. The results showed that the operation of R1 was more stable than that of R0, especially in response to the substrate shocks. Subse- quently, the properties of the ANAMMOX granules and the effects of the feeding protocol on those prop- erties were investigated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect