剩余活性污泥曝气处理对胞外聚合物特性及污泥脱水的影响
PDF下载 (9887)王小宝,孙慧萍,王 聪,俞心怡,吕文洲 *.剩余活性污泥曝气处理对胞外聚合物特性及污泥脱水的影响[J].宁波大学学报(理工版),2018,31(4):110-115.DOI:
WANG Xiao-bao,SUN Hui-ping,WANG Cong,YU Xin-yi,L? Wen-zhou *.Effect of aeration on characteristics of extracellular polymeric substances and activated sludge dewaterability[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(4):110-115.DOI:
| Title: | Effect of aeration on characteristics of extracellular polymeric substances and activated sludge dewaterability |
| 作者: | 王小宝, 孙慧萍, 王 聪, 俞心怡, 吕文洲 * |
| Author(s): | WANG Xiao-bao, SUN Hui-ping, WANG Cong, YU Xin-yi, L? Wen-zhou * |
| 关键词: | 剩余污泥; 曝气; 污泥性质; EPS分层; EPS组分 |
| Keywords: | excess sludge; aeration; sludge characteristics; EPS layers; EPS components |
| 分类号: | X703 |
| 文献标识码: | A |
| 摘要: | 剩余污泥经曝气处理可以提高胞外聚合物(EPS)的产量并用于污染物絮凝, 但曝气对具体EPS组分和污泥脱水能力的影响尚不明确. 本研究分析了曝气对EPS分层组分、组分性质以及污泥脱水性能的影响. 结果表明: 曝气4h后, EPS中蛋白、多糖和DNA分别增加82.67%、12.72%和9.18%, 污泥比阻比原始污泥增加了4.01×107s2·g-1; 相关性分析表明影响比阻的组分由大到小依次为: 蛋白>多糖>DNA; EPS分层中Slime各组分减少, LB-EPS、TB-EPS各组分增加, 且LB-EPS增加量大于TB-EPS, LB-EPS是影响比阻的主要物质; 三维荧光数据显示: EPS分层中芳香蛋白对比阻的影响作用大于溶解性代谢产物. |
| Abstract: | The yields of EPS can be increased after the excessively activated sludge is subjected to aeration treatment, and the EPS can be applied to flocculate pollutants. However, the effects of aeration on EPS components and sludge dewaterability remain unknown. The influences of aeration on the components of different layers, the components properties of EPS and the sludge dewaterability are investigated in this study. The results show that after aeration of 4h, the specific resistance to filtration (SRF) of sludge increases by 4.01×107s2·g-1 comparing with the original sludge; the contents of proteins, polysaccharides and DNA increase by 82.00%, 12.72% and 9.18%, respectively. Based on the correlation analysis, the order of correlations between EPS components and SRF is protein>polysaccharide>DNA. As for the different EPS layers, the components of Slime decrease while those of LB-EPS and TB-EPS increase. The content of LB-EPS increases within larger range than that of TB-EPS. LB-EPS is identified to be the main substance affecting the SRF. According to three-dimensional emission and excitation matrixes (EEM) results, the effect of aromatic protein on SRF is greater than soluble microbial products. |
| 参考文献 /References: | [1] Comte S, Guibaud G, Baudu M. Biosorption properties of extracellular polymeric substances (EPS) towards Cd, Cu and Pb for different pH values[J]. Journal of Hazardous Materials, 2008, 151(1):185-193. [2] 金鹏康, 陈飞, 章佳昕, 等. 活性污泥胞外聚合物的分层组分及溶解性微生物代谢产物的特性[J]. 环境化学, 2015, 34(7):1323-1328. [3] Zhang Z, Zhang J, Zhao J, et al. Effect of short-time aerobic digestion on bioflocculation of extracellular polymeric substances from waste activated sludge[J]. Environmental Science and Pollution Research International, 2015, 22(3):1812-1818. [4] Li X Y, Yang S F. Influence of loosely bound extracellular polymeric substances (EPS) on the flocculation, sedimentation and dewaterability of activated sludge[J]. Water Research, 2007, 41(5):1022-1030. [5] Sesay M L, Ozcengiz G, Dilek S F. Enzymatic extraction of activated sludge extracellular polymers and implications on bioflocculation[J]. Water Research, 2006, 40(7):1359-1366. [6] 陈静, 陈士才, 许建华, 等. 聚丙烯酰胺预处理自来水厂污泥[J]. 中国给水排水, 2004, 20(9):37-39. [7] 李雪, 李飞, 曾光明, 等. 表面活性剂对污泥脱水性能的影响及其作用机理[J]. 环境工程学报, 2016, 10(5):2221-2226. [8] 王硕, 陈晓光, 杨叙军, 等. 化学调质污泥深度脱水过程及其潜在影响研究[J]. 中国给水排水, 2016, 32(15):42-47. [9] 周俊, 周立祥, 黄焕忠. 污泥胞外聚合物的提取方法及其对污泥脱水性能的影响[J]. 环境科学, 2013, 34(7):2752-2757. [10] 朱睿, 吴敏, 杨健, 等. 浓缩污泥中胞外聚合物组分与脱水性的关系[J]. 北京大学学报(自然科学版), 2010, 46(3):385-388. [11] 姚萌, 程国淡, 谢小青, 等. 城市污水厂污泥化学调理深度脱水机理[J]. 环境工程学报, 2012, 6(8):2787-2792. [12] Zhang Z, Wang P, Zhang J, et al. Removal and mechanism of Cu (II) and Cd (II) from aqueous single-metal solutions by a novel biosorbent from waste-activated sludge[J]. Environmental Science and Pollution Research International, 2014, 21(18):10823-10829. [13] 王电站, 周立祥, 何锋. 生物淋滤法提高制革污泥脱水性能的研究[J]. 中国环境科学, 2006, 26(1):67-71. [14] Bo F, Palmgren R, Keiding K, et al. Extraction of extracellular polymers from activated sludge using a cation exchange resin[J]. Water Research, 1996, 30(8):1749-1758. [15] Bradford M M. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding[J]. Analytical Biochemistry, 1976, 72(1/2):248-254. [16] Sun Y, Clinkenbeard K D, Clarke C, et al. Pasteurella haemolytica leukotoxin induced apoptosis of bovine lymphocytes involves DNA fragmentation[J]. Veterinary Microbiology, 1999, 65(2):153-166. [17] 张俊珂, 曾萍宋, 于会斌. 受四环素影响的活性污泥胞内外聚合物特征.[J]. 中国环境科学, 2016, 36(3):751-758. [18] Zhang W, Peng S, Xiao P, et al. Understanding the evolution of strati?ed extracellular polymeric substances in full-scale activated sludges in relation to dewaterability [J]. RSC Advances, 2014, 5(2):1282-1294. [19] Merrylin J, Kumar S A, Kaliappan S, et al. Biological pretreatment of non-flocculated sludge augments the biogas production in the anaerobic digestion of the pretreated waste activated sludge[J]. Environmental Technology, 2013, 34(13/14):2113-2123. [20] Huo M, Zheng G, Zhou L. Enhancement of the dewaterability of sludge during bioleaching mainly controlled by microbial quantity change and the decrease of slime extracellular polymeric substances content[J]. Bioresource Technology, 2014, 168(3):190-197. [21] 包宜俊, 杨存满, 李颖, 等. 光谱法研究胞外聚合物与四溴双酚A的相互作用[J]. 中国环境科学, 2016, 36(6):1773-1779. [22] Zhang Z, Zhou Y, Zhang J, et al. Effects of short-time aerobic digestion on extracellular polymeric substances and sludge features of waste activated sludge[J]. Chemical Engineering Journal, 2016, 299:177-183. [23] Novak J T, Sadler M E, Murthy S N. Mechanisms of floc destruction during anaerobic and aerobic digestion and the effect on conditioning and dewatering of biosolids[J].Water Research, 2003, 37(13):3136-3144. [24] Yang S F, Li X Y, Yu H Q. Formation and characterisation of fungal and bacterial granules under different feeding alkalinity and pH conditions[J]. Process Biochemistry, 2008, 43(1):8-14. |
| 备注/Memo: | 收稿日期: 2017－12－04. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 宁波市自然科学基金（2017A610298）.第一作者: 王小宝（1990－）, 男, 江西上饶人, 在读硕士研究生, 主要研究方向: 污水微生物处理. E-mail: 1522296955@qq.com*通信作者: 吕文洲（1974－）, 男, 陕西临潼人, 博士/副教授, 主要研究方向: 废水生物处理及资源化. E-mail: luwenzhou@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
