Piggery wastewater treatment by Acinetobacter sp. TX5 immobilized with spent mushroom substrate in a fixed-bed reactor
| Autor: | Lanying Zhong, Ershu Lin, Yunlong Yang, Kaihui Hu, Xin Tao, Shuqian Sun |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Nitrite Reductases Environmental Engineering Wastewater 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Denitrifying bacteria Bioreactors Ammonia 010608 biotechnology medicine Environmental Chemistry Acinetobacter sp Animal Husbandry Waste Management and Disposal 0105 earth and related environmental sciences Biological Oxygen Demand Analysis Mushroom Chromatography Acinetobacter Chemistry Substrate (chemistry) Nitrite reductase Pollution Sewage treatment Agaricales Activated carbon medicine.drug |
| Zdroj: | Science of The Total Environment. 644:1460-1468 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2018.07.076 |
| Popis: | Acinetobacter sp. TX5 immobilized with spent Hypsizygus marmoreus substrate (SHMS) was used to treat the raw piggery wastewater (RPW). In batch experiments, NH4+-N in the diluted RPW decreased from initial 34.95 mg/L to 3.83 mg/L at 8 h with the removal efficiency (RE) being 89%, and the beads immobilized with SHMS were comparable to those immobilized with activated carbon. In continuous experiments, the RE ranged from 74% to 95% for NH4+-N, from 73% to 93% for TN and from 54% to 82% for COD when the RPW was treated in a fixed-bed reactor packed with SHMS-immobilized TX5. The isotope analysis and enzyme purification indicated simultaneous nitrification and denitrification existing in TX5. This is the first time that spent mushroom substrates have been used to immobilize Acinetobacter species to treat the real RPW and a denitrifying nitrite reductase (dNiR) has been purified to make the nitrogen removal pathway in this species clearer. |
| Databáze: | OpenAIRE |
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