DAIYang-ye,ZHUJian,SHANGJia-ji,et al.Operation Effect of IFAS Process in Upgrading and Reconstruction of Wastewater Treatment Plant[J].China Water & Wastewater,2025,41(9):66-72.
IFAS工艺用于污水处理厂提标改造的运行效果分析
- Title:
- Operation Effect of IFAS Process in Upgrading and Reconstruction of Wastewater Treatment Plant
- 关键词:
- 提标改造; 填料; 固定生物膜-活性污泥工艺; 生物脱氮; 微生物菌群
- Keywords:
- upgrading and reconstruction; filler; fixed biofilm-activated sludge process; biological nitrogen removal; microbial community
- 摘要:
- 某污水处理厂采用固定生物膜-活性污泥（IFAS）工艺对原有的AAO工艺进行强化脱氮处理（投加固定填料），出水水质执行《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》（DB 32/1072—2018）中表2标准。对提标改造后的运行效果进行分析，并分别测定活性污泥和生物膜的硝化和反硝化效能，发现好氧池中填料表面生物膜的硝化速率是活性污泥的1.71倍，表明投加固定填料后硝化能力显著提高。采用Illumina MiSeq高通量测序技术分析系统中的微生物群落结构，发现在门水平上主要富集了Proteobacteria、Bacteroidota、Actinobacteria及Chloroflexi，在属水平上主要富集了Thauera、Ferruginibacter、Thermomonas、Rhodobacter、norank_f__Caldilineaceae和norank_f__Saprospiraceae。对污泥进行微生物菌群LEfSe线性判别分析，发现填料表面生物膜内富集了大量脱氮功能菌，固定填料强化了硝化和反硝化作用。
- Abstract:
- Fixed biofilm-activated sludge (IFAS) process was applied to strengthen nitrogen removal of the original AAO process in a wastewater treatment plant. The effluent quality reached the criteria specified in the Discharge Standard of Main Water Pollutants for Municipal Wastewater Treatment Plant & Key Industries of Taihu Area (DB 32/1072-2018). The operation effect after the upgrading and reconstruction was analyzed, and the nitrification and denitrification efficiencies of activated sludge and biofilm were measured respectively. It was found that the nitrification rate of biofilm on the surface of the filler in the aerobic tank was 1.71 times of activated sludge, indicating that the nitrification capacity was significantly improved after the addition of fixed filler. The microbial community of the system was analyzed by Illumina MiSeq high-throughput sequencing technology. Proteobacteria, Bacteroidota, Actinobacteria and Chloroflexi were mainly enriched at the phylum level, and Thauera, Ferruginibacter, Thermomonas, Rhodobacter, norank_f__Caldilineaceae and norank_f__Saprospiraceae were mainly enriched at the genus level. The microbial community of sludge was analyzed by LEfSe linear discriminant analysis. It was found that a large number of nitrogen removal functional bacteria were enriched in the biofilm on the surface of the filler, and the fixed filler enhanced nitrification and denitrification.
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