Journal article
Cultivation of aerobic granular sludge with a mixed wastewater rich in toxic organics
School of Earth and Space Sciences, University of Science & Technology of China, Hefei 230026, China1
Department of Chemistry, University of Science & Technology of China, Hefei 230026, China2
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China3
School of Resources & Environmental Engineering, Hefei University of Technology, Hefei 230092, China4
Aerobic granular sludge was successfully cultivated in a sequencing batch reactor fed with a mixture of chemical industrial wastewater rich in toxic organics and the effluent from an anaerobic acidogenic reactor. After 30-day operation, stable granules with a size of 1.0–3.0mm were obtained. These granules appeared to have rougher surface than those cultivated with the carbohydrate- or acetate-rich wastewaters.
There exhibited a “core” in the internal structure of the granules, which might benefit microorganisms to survive and resist the harsh environment. The formation of granules significantly improved the ability of sludge to withstand the toxic substances. The chemical oxygen demand removal efficiency of the granule-based reactor could reach around 80%, while its ammonia and total nitrogen removal efficiencies reached 90% and 40%, respectively.
The aerobic-granule-based reactor showed an ability to resist the wastewater toxicity.
| Language: | English |
|---|---|
| Year: | 2011 |
| Pages: | 7-12 |
| ISSN: | 1873295x and 1369703x |
| Types: | Journal article |
| DOI: | 10.1016/j.bej.2011.07.005 |
