| 引用本文: | 袁悦,刘瑾瑾,彭永臻.污泥厌氧发酵物强化低碳氮比生活污水脱氮除磷[J].哈尔滨工业大学学报,2019,51(8):14.DOI:10.11918/j.issn.0367-6234.201901097 |
| YUAN Yue,LIU Jinjin,PENG Yongzhen.Enhancement of nitrogen and phosphorus removal from municipal waste water by sludge anaerobic fermentation products[J].Journal of Harbin Institute of Technology,2019,51(8):14.DOI:10.11918/j.issn.0367-6234.201901097 |
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| 污泥厌氧发酵物强化低碳氮比生活污水脱氮除磷 |
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袁悦1,2,刘瑾瑾1,彭永臻1
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(1.北京工业大学国家工程实验室,北京 100124; 2.上海市政工程设计研究总院(集团)有限公司,上海 200092)
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| 摘要: |
| 为降低使用污泥厌氧发酵物作碳源时的成本,以及简化使用步骤,研究将既不进行发酵液与污泥的分离,也不去除副产物氮和磷的污泥发酵物直接作生活污水脱氮除磷碳源的可行性.以实际低碳氮比城市生活污水为处理对象,将不同量的污泥碱性发酵物（0,0,0,0,200 mL,对应的SCOD质量依次为0,9,8,6,792 mg）作为生物反硝化脱氮和厌氧释磷的碳源,考察脱氮和释磷情况.结果表明:随着投加量的增加,反应结束时氮氧化合物（NO-x-N）先降低后升高,当投加量为50 mL（SCOD质量为198 mg、氮质量为12.9 mg、碳氮比为15.3）时,NO-x-N质量浓度最低,仅为1.2 mg/L且全部以NO-2-N的形式存在,对应的反硝化效率为94.9%；厌氧释磷过程随着污泥发酵物投加量的增多,释磷量不仅没有升高,反而会降低,当投加量为20 mL（SCOD质量为79 mg、氮质量为5.2 mg、磷质量为1.6 mg、碳氮比为15.3、碳磷比为49.5）时,反应结束时释磷量最多,高达23.8 mg/L.此外,通过模拟硝化过程、反硝化过程以及鉴定细胞形态,得出污泥发酵物中硝化细菌和反硝化细菌的细胞结构遭到破坏,其活性均被抑制,即发酵物的引入不影响污水脱氮除磷系统主要菌群结构的稳定性.因此,污泥厌氧发酵物直接做生活污水脱氮除磷的碳源是可行的,本研究中对于反硝化脱氮,50 mL为最佳投加量,对于厌氧释磷,20 mL为最佳投加量. |
| 关键词: 污泥 厌氧发酵物 低碳氮比生活污水 脱氮除磷 细菌活性 |
| DOI：10.11918/j.issn.0367-6234.201901097 |
| 分类号:X703 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(21677005)；中国博士后科学基金(2017M621514) |
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| Enhancement of nitrogen and phosphorus removal from municipal waste water by sludge anaerobic fermentation products |
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YUAN Yue1,2,LIU Jinjin1,PENG Yongzhen1
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（1.National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China; 2. Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China）
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| Abstract: |
| To reduce the cost of using sludge anaerobic fermentation products as carbon source and simplify the process, a novel method was proposed to study the feasibility of employing sludge fermentation products directly without separating fermentation broth and sludge or removing nitrogen and phosphorus. Different dosages of sludge alkaline fermentation products (i.e., 0,0, 0,0, and 200 mL, whose SCOD are 0,9, 8,6, and 792 mg) were poured into low C/N ratio municipal waste water to investigate nitrogen removal and phosphorus release. Results show that the nitric oxide (NO-x-N) decreased first and then increased with the increase of the dosage of fermentation products. When the dosage was 50 mL with SCOD of 198 mg, nitrogen of 12.9 mg, and C/N ratio of 15.3, the concentration of NO-x-N was the lowest, being only 1.2 mg/L and in the form of NO-2-N, and the corresponding denitrification efficiency was 94.9%. However, with the increase of the addition of fermentation products, the amount of phosphorus release was not increased but decreased. When the dosage was 20 mL with SCOD of 79 mg, nitrogen of 5.2 mg, phosphorus of 1.6 mg, C/P ratio of 15.3, and C/N ratio of 49.5, the amount of phosphorus release was the highest at the end of the reaction, reaching 23.8 mg/L. Moreover, nitrification and denitrification processes showed that the bacteria activity was inhibited due to the damage of the cell structure of nitrifying bacteria and denitrifying bacteria in fermentation products, which was also proved by cell morphology. It indicated that the introduction of fermentation did not affect the stability of main microbial community structure in sewage nitrogen and phosphorus removal system. Therefore, it is feasible for sludge anaerobic fermentation products to be directly used as carbon source. In this study, the optimal amount for denitrifying nitrogen removal was 50 mL, and that for anaerobic phosphorus release was 20 mL. |
| Key words: sludge fermentation products low C/N ratio municipal waste water nitrogen and phosphorus removal bacteria activity |
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