Effect of granular activated carbon on the aerobic granulation of sludge and its mechanism
| Autor: | Liu Xiaoying, Lian Qin, Xiaoguo Chen, Yitian Shen, Jia Tao, Bolin Li, Chen Junnan, Juan You |
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| Rok vydání: | 2017 |
| Předmět: |
Granular activated carbon
Environmental Engineering 0208 environmental biotechnology Bioengineering 02 engineering and technology 010501 environmental sciences 01 natural sciences Waste Disposal Fluid Granulation Bioreactors Operating time Waste Management and Disposal 0105 earth and related environmental sciences Sewage Renewable Energy Sustainability and the Environment Chemistry Granule (cell biology) Environmental engineering Phosphorus General Medicine Aerobiosis 020801 environmental engineering Activated sludge Chemical engineering Charcoal Aerobic granulation Anaerobic exercise |
| Zdroj: | Bioresource technology. 236 |
| ISSN: | 1873-2976 |
| Popis: | The granulation of activated sludge and effect of granular activated carbon (GAC) was investigated under the alternative anaerobic and aerobic conditions. The results showed that GAC accelerated the granulation, but had no obvious effect on the bacterial community structure of granules. The whole granulation process could be categorized into three phases, i.e. lag, granulation and granule maturation phase. During lag period GAC provided nuclei for sludge to attach, and thus enhanced the morphological regularization of sludge. During granulation period the granule size increased significantly due to the growth of bacteria in granules. GAC reduced the compression caused by the inter-particle collisions and thus accelerate the granulation. GAC has no negative effect on the performance of SBR, and thus efficient simultaneous removal of COD, nitrogen and phosphorus were obtained during most of the operating time. |
| Databáze: | OpenAIRE |
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