环境工程学报2026，Vol.20Issue(8)：2491-2498,8.DOI:10.12030/j.cjee.202602010
缓释碳源协同硫自养反硝化处理制革废水脱氮性能与机制研究
Nitrogen removal performance and mechanism in tannery wastewater using a combined system of slow-release carbon source and sulfur autotrophic denitrification
赵文辉 1党岩 1邱斌 1孙运海2
作者信息
- 1. 北京林业大学水体污染源控制技术北京市重点实验室,北京 100080
- 2. 北京天富勤科技有限公司,北京 100020
- 折叠
摘要
Abstract
A synergistic denitrification system was established employing pine bark as a slow-release carbon source and pyrite as an autotrophic electron donor,addressing the problem of high residual nitrate concentrations in tannery wastewater after biological treatment.The impact of nitrate concentration and filler packing configuration on the nitrogen removal performance of the system were investigated.The results demonstrated that,when NO3--N mass concentrations in the influent was within 150 mg·L-1,the heterotrophic-sulfur autotrophic synergistic denitrification system displayed superior performance compared to either autotrophic or heterotrophic systems alone.Besides,removal efficiencies of 90.2%for NO3--N and 86.5%for total nitrogen(TN)were achieved,while nitrite accumulation was reduced by 11 mg·L-1 compared to the autotrophic denitrification system.Under mixed packing conditions,the nitrogen removal performance of the synergistic system outperformed that under layered packing.An average concentration of NO3--N in the effluent was 7.1 mg·L-1,with the corresponding removal efficiency increased to 95.3%.Key functional genera such as Thauera and Thiothrix were enriched in the heterotrophic-sulfur autotrophic synergistic denitrification system,along with increased gene abundances of nitrate reductase(EC 1.7.5.1)and nitrite reductase(EC 1.7.2.1),which were significant factors contributing to the high denitrification efficiency.关键词
异养协同硫自养反硝化/制革废水/生物脱氮/微生物菌群Key words
heterotrophic symbiotic sulfur autotrophic denitrification/leather wastewater/biological nitrogen removal/microbial community分类
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赵文辉,党岩,邱斌,孙运海..缓释碳源协同硫自养反硝化处理制革废水脱氮性能与机制研究[J].环境工程学报,2026,20(8):2491-2498,8.
