Indexed by:
Abstract:
The feasibility of coupling denitrifying phosphorus removal (DPR) with simultaneous partial nitrification-endogenous denitrification (SPNED) was investigated in a single-sludge sequencing batch reactor for deep-level nutrient removal from municipal and nitrate wastewaters. After 160-day operation, the DPR process simultaneously reduced most PO43--P and NO3--N anoxically, and the SPNED process achieved further total nitrogen (TN) removal at low dissolved oxygen condition with TN removal efficiency of 90.8%. The effluent NH4+-N, PO43--P and TN concentrations were 1.0, 0.1 and 7.2 mg/L, respectively. Microbial analysis revealed that Dechloromonas (6.7%) dominated DPR process, whereas the gradually enriched Nitrosomonas (4.5%) and Candidatus Competibacter (6.8%) conducted SPNED process accompanied with sharply eliminated Nitrospirae (1.4%). Based on these findings, a novel strategy was proposed to achieve further nutrient removal in conventional treatment through integrating the DPR-SPNED process. As a result, similar to 100% of extra carbon and similar to 10% of oxygen consumptions would be reduced with satisfactory effluent quality.
Keyword:
Reprint Author's Address:
Email:
Source :
BIORESOURCE TECHNOLOGY
ISSN: 0960-8524
Year: 2019
Volume: 289
1 1 . 4 0 0
JCR@2022
ESI Discipline: BIOLOGY & BIOCHEMISTRY;
ESI HC Threshold:169
JCR Journal Grade:1
Cited Count:
WoS CC Cited Count: 50
SCOPUS Cited Count: 58
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3