异养协同硫自养ABR系统还原高浓度高氯酸盐

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Abstract

A novel heterotrophic combining sulfur-based autotrophic ABR reactor was constructed to treatthe high concentration of perchlorate (ClO₄^-) wastewater.The ClO₄^- removal, the sulfate (SO₄^2-) production, the biomass and EPS changes under different ClO₄^- concentrationswereexplored. The results showed that the ClO₄^- removalefficiency reached to 99.60% at HRT of 12h and the influent ClO₄^- concentration of 300mg/L, the effluent SO₄^2- concentration was approximately stabilized at 150mg/L.The influent pH was approximately 7.8~8.0. With ClO₄^- concentration increasing, the effluent pH of the heterotrophic unit was increased to 8.0~8.3, while the effluent pH of the autotrophic unit was decreased to 6.6~6.9.Therefore, the combined heterotrophic and sulfur-based autotrophic process can achieve an acid-base balance.Moreover, the more EPScontent wasproduced by microorganism when influent perchlorate concentration increased gradually in the process.And the contentof EPS in the first compartment of the heterotrophic unit was maximum, which reachedto 102.46mg/(g·vss). The secretion of EPS can not only form a protective layer to resist external pressure, but also play a role in the reserve of carbon sources and energy.

Key words： combined heterotrophic and sulfur-based autotrophic process perchlorate extracellularpolymeric substances anaerobic baffled reactor

Received: 18 April 2018

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	Articles by authors
	LI Kun
	LI Hai-bo
	LI Yao-feng
	LIN Xin-yi
	LI Bao-xin
	SONG Yuan-yuan
	GUO Jian-bo

Cite this article:

LI Kun,LI Hai-bo,LI Yao-feng等. Heterotrophic combiningsulfur-based autotrophic process reduction of high concentration perchlorate using ananaerobic baffle reactor[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(11): 4153-4158.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I11/4153

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