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| Study on Enhanced Aerobic Activated Sludge Treatment of Mid-stage Pulping Wastewater by Dominant Flora |
| Received:January 19, 2019 |
| DOI：10.11981/j.issn.1000-6842.2020.01.54 |
| Key Words:dominant flora;aerobic activated sludge;pulping mid-stage wastewater |
| Fund Project:福建省新型污染物生态毒理效应与控制重点实验室开放经费资助课题（PY18002）。 |
| Author Name | Affiliation | Postcode | | QI Shixin* | College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042 | 266042 | | YANG Da | College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042 | 266042 | | ZHANG Hao | College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042 | 266042 | | LAN Huixia | College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042
Fujian Provincial Key Laboratory of Ecology-Toxicological Effects &
Control for Emerging Contaminants, Putian, Fujian Province, 351100)
(* E-mail:corresponding author:lanhuixia@163.com | 351100 |
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| Abstract: |
| The enhanced aerobic activated sludge treatment of pulping middle-stage effluent by adding the dominant bacterial flora constructed with 35% of B.subtilis, 50% of B.cereus and 15% of V. panthenius was studied. The CODCr removal rate and the physicochemical characteristics of sludge in the whole acclimatization process with the addition of dominant bacteria were better than those without the addition of dominant bacteria. When the dosage of the dominant flora was 0.3 g/L, the effluent treatment efficiency was the best, and the CODCr removal rate could reach 72.9%. The degradation kinetics of pulping wastewater treated by aerobic activated sludge was studied, the result showed that it conformed to the first-order degradation kinetics model. The degradation rate constant of the system with 0.3 g/L of dominant bacteria was 0.0487 min-1, which was higher than that of the system without dominant bacteria. The treatment cycle was shortened to 8 h after the addition of dominant bacteria, which was 1 h shorter than that of the system without the addition of dominant bacteria. |
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