活化方式对过硫酸盐强化剩余污泥发酵的影响

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摘要

对比考察了二价铁（Fe²⁺）、零价铁（ZVI）、超声波（US）3种活化方式对过硫酸盐（S₂O₈^2-）预处理剩余污泥的溶胞性能，并研究其对污泥厌氧发酵产酸进程的促进效能.结果表明，相对比未预处理污泥，S₂O₈^2-能够明显促进剩余污泥溶胞和发酵产酸进程；同时，活化后的S₂O₈^2-预处理效果明显优于未活化预处理实验组，其中S₂O₈^2-+Fe²⁺预处理体系的促进作用最为明显.Fe²⁺、ZVI和US活化S₂O₈^2-的3组溶胞率分别为42.6%、36.5%和32.9%，相比未活化实验组（22.3%）提高了10.6%～20.3%；3组活化体系最大挥发酸浓度分别为8052，6613，4996mg COD/L，而未活化组仅为3296mg COD/L.此外，不同方式活化S₂O₈^2-预处理对溶解性有机物溶出及挥发酸组分分布也有一定影响.从环境和经济角度来看，S₂O₈^2-+Fe²⁺体系对促进污泥发酵进程具有更大意义.

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	樊雅欣
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关键词 ：剩余污泥(WAS), 过硫酸盐, 活化方式, 厌氧发酵, 短链脂肪酸(SCFAs)

Abstract：

Persulfate (S₂O₈^2-) and its activations were investigated, including ferrous (Fe²⁺), zero-valent iron (ZVI) and ultrasonic (US), on waste activated sludge (WAS) disintegration and acidification. Experimental results showed that S₂O₈^2- effectively disintegrated WAS flocs matrix and further enhanced short-chain fatty acids (SCFAs) production, compared with that obtained from un-pretreated WAS. In addition, activated S₂O₈^2- presented better WAS hydrolysis and acidification performance over un-activated S₂O₈^2- test. The lysis rates of Fe²⁺, ZVI and US activated S₂O₈^2- groups reached to 42.6%, 36.5% and 32.9%, respectively, which were about 10.6%~20.3% higher than that obtained in the non-activated test (22.3%). The maximum SCFAs concentration in the aforementioned three activated tests were 8052, 6613, 4996mg COD/L, respectively, while that was only 3296mg COD/L in non-activated test. Furthermore, the release of organics and the distribution of generated SCFAs were also affected by S₂O₈^2- activations. From the environmental and economic perspective, the S₂O₈^2-+Fe²⁺ system played more significant role for enhancing the SCFAs recovery from WAS fermentation.

Key words： waste activated sludge (WAS) persulfate activation methods anaerobic fermentation short-chain fatty acids (SCFAs)

收稿日期: 2018-11-07

PACS:

X705

基金资助:

国家自然科学基金青年基金资助项目（51608345）；国家博士后科学基金资助项目（2017T100170）

通讯作者: 岳秀萍,教授,yuexiuping@tyut.edu.cn E-mail: yuexiuping@tyut.edu.cn

作者简介: 樊雅欣(1994-),女,山西晋城人,太原理工大学硕士研究生,主要从事废弃生物质资源化处理及产能研究.

引用本文:

樊雅欣, 刘红燕, 潘凌峰, 周爱娟, 岳秀萍. 活化方式对过硫酸盐强化剩余污泥发酵的影响[J]. 中国环境科学, 2019, 39(6): 2460-2466. FAN Ya-xin, LIU Hong-yan, PAN Ling-feng, ZHOU Ai-juan, YUE Xiu-ping. Enhancement of waste activated sludge acidification by persulfate: Role of activation methods. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(6): 2460-2466.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2019/V39/I6/2460

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