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论文类型： 期刊论文

发表时间： 2018-10-01

发表刊物： CHEMOSPHERE

收录刊物： PubMed、SCIE

卷号： 208

页面范围： 854-861

ISSN号： 0045-6535

关键字： Municipal sewage; SNAD; Response surface methodology; C/N; DO

摘要： In this study, a non-woven rotating biological contactor was evaluated for the treatment of municipal sewage via simultaneous partial nitrification, anaerobic ammonia oxidation (anammox), and denitrification (SNAD). Fluorescence in situ hybridization analysis showed that the dominant bacterial group in the aerobic outer layer of the biofilm was ammonia-oxidizing bacteria (65.13%), whereas anammox (47.17%) and denitrifying (38.91%) bacteria were present in the anaerobic inner layer. Response surface methodology was applied to develop mathematical models for the interaction between C/N and dissolved oxygen (DO) for chemical oxygen demand (COD) and total nitrogen (TN) removal. Results showed that the optimum region for SNAD was at C/N = 1.4-23 and DO = 0.2-0.8 mg/L. The most optimal operating condition was determined at C/N = 23 and DO = 0.2 mg/L, with actual removal rates of COD and TN were 83.12% and 79.13%, respectively, which are in close model consistency with model prediction (84% and 80%). (C) 2018 Elsevier Ltd. All rights reserved.