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Affiliation of Author(s):

环境与市政工程学院

Journal:

Environmental Technology

Key Words:

中文关键字：自养脱氮除硫；N/S;pH;单质硫；微生物群，英文关键字：Autotrophic simultaneous； N/Smole ratio； pH；elemen

Abstract:

pH has an important influence on the elemental sulfur accumulated in an autotrophic simultaneous desulfurization and denitrification process. The influent nitrate to sulfide (N/S) mole ratio was set to 0.5, 0.67, 1.0, 1.33 and 2.0 with a 200 mg/L sulfide concentration. The effect of pH on elemental sulfur conversion and microbial communities was studied. Sulfide removal was achieved to the extent of 98% under near-neutral and weak base conditions after 24 h of reaction. The conversion rate of elemental sulfur was 29.41% under the near-neutral condition. The weak base condition led to greater formation of sulfate, and the nitrate used by the microorganisms was transformed mainly to N2 with a removal rate of 96%. Increasing the retention time from 24 to 48 h caused the removal rate of nitrate increased from 63.58% to 90% under the near-neutral condition. Sulfurovum sp. was the functioning bacterial species, and bands 1 and 2 represent different species of Sulfurovum sp. in the system according to the PCR-DGGE analysis of the microbial community structure. The functional bacteria represented by band 1 produced mainly sulfate, but the functional bacteria represented by band 2 produced mainly elemental sulfur.

Note:

徐金兰

Co-author:

樊仪旻,李智旭

First Author:

xujinlan

Indexed by:

Journal paper

Volume:

卷：37

Issue:

期：23

Page Number:

页：3014-3023

Translation or Not:

no

Date of Publication:

2016-03-01