Particulate organics degradation and sludge minimization in aerobic, complete SRT bioreactors
| Autor: | Elisavet Amanatidou, Lazaros Tsikritzis, Georgios Samiotis, Eleni Trikoilidou |
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| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
0208 environmental biotechnology Biomass 02 engineering and technology 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Bioreactors Bioreactor Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Biological Oxygen Demand Analysis Sewage Chemistry Ecological Modeling Models Theoretical Particulates Pollution 020801 environmental engineering Biodegradation Environmental Activated sludge Volatile suspended solids Environmental chemistry Yield (chemistry) Degradation (geology) Particulate Matter Steady state (chemistry) Abattoirs |
| Zdroj: | Water Research. 94:288-295 |
| ISSN: | 0043-1354 |
| Popis: | The study evaluates the assumption that in activated sludge processes and under specific operating conditions, the considered unbiodegradable particulate organic fractions of influent (XU) organic solids and biomass decay residues (cell debris, XE) are degraded. The evaluation was performed by comparing sludge observed yield (Yobs) evolution in two full scale, complete solids retention time (SRT), aerobic bioreactors, to the predictions of two activated sludge models. The results showed that in steady state operating conditions of complete solids retention AS processes very low solids accumulation occur. In these conditions, solids accumulation is slightly affected by kinetic coefficients and significantly affected by XU and XE degradation rates. High endogenous residues degradation rate values of 0.05 d(-1) and 0.02 d(-1) were estimated for the two bioreactors, resulting in low solids accumulation, calculated at 1.6 tons and 3.59 tons per year respectively, of which 1.37 and 0.87 tons were non volatile suspended solids. Depending on WWTP operating conditions the endogenous residues degradation rate is the limiting factor of solids accumulation and consequently for particulate organics degradation. |
| Databáze: | OpenAIRE |
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