DINGXin,LIXiang,BIZhen,et al.Recovery of Phosphorus by Anaerobic/Aerobic Alternative Biofilm Process Using Organic Carbon from Raw Wastewater[J].China Water & Wastewater,2023,39(5):1-8.
Recovery of Phosphorus by Anaerobic/Aerobic Alternative Biofilm Process Using Organic Carbon from Raw Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第5期
Page:
1-8
Column:
Date of publication:
2023-03-01
- Keywords:
- municipal wastewater; biofilm; anaerobic/aerobic alternation; phosphorus recovery; carbon source
- Abstract:
- In the anaerobic stage, addition of carbon source to stimulate phosphorus release has always been a necessary measure for biofilm phosphorus recovery system. However, the carbon source of 200-300 mg/L is generally contained in urban sewage in China, so it is particularly important to develop new processes and models that can make full use of carbon source in sewage and improve phosphorus recovery effect. In this study, anaerobic/aerobic cycle operation mode was carried out, and the feasibility of phosphorus removal and enrichment by using organic carbon source from raw wastewater in suspended carrier biofilm process was investigated. When the organic loading was 0.25 kg/(kgMLSS·d), the single cycle was 48 h, the anaerobic/aerobic alternate was 4 h respectively, and the water-filling ratio was 25% in the process of biofilm cultivation, the phosphorus-accumulating biofilm with suspended filler could be formed within 30 days. It was feasible to recover phosphorus from biofilm by using carbon source in raw water, PO43--P in effluent could be stabilized below 0.5 mg/L, and the concentration of phosphorus recovery solution was stabilized between 50 mg/L and 60 mg/L, with the highest value reaching 60 mg/L. High-throughput sequencing indicated that Proteobacteria at the phylum level was dominant, and the abundance increased from 38.5% to 66.4%; at the genus level, Candidatus_Competibacter increased from 3.4% to 28.1%, Defluviicoccus increased from 2.6% to 7.5%, and Pseudomonas was the functional phosphorus-accumulating bacterium, accounting for 2.9%.
Last Update:
2023-03-01