Biological nitrate removal using wheat straw and PLA as substrate

被引：45

作者：

Fan, Zhenxing ^{[1
]}

Hu, Jun ^{[1
]}

Wang, Jianlong ^{[1
,2
]}

机构：

[1] Tsinghua Univ, INET, Lab Environm Technol, Beijing 100084, Peoples R China

[2] Tsinghua Univ, INET, Beijing Key Lab Fine Ceram, Beijing 100084, Peoples R China

来源：

ENVIRONMENTAL TECHNOLOGY | 2012年 / 33卷 / 21期

关键词：

nitrate; denitrification; biodegradable polymers; wheat straw; PLA; solid carbon source; BIODEGRADABLE POLYMERS; CARBON SOURCE; SOLID SUBSTRATE; DENITRIFICATION; WATER; GROUNDWATER;

D O I：

10.1080/09593330.2012.669411

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Biological nitrate removal using wheat straw and polylactic acid (PLA) as both carbon source and biofilm support was investigated. The results showed that biofilm could develop on the surface of wheat straw within 15 d, the denitrification rate was 0.067 mg-N/(g-wheat straw.h) and nitrate removal efficiency was about 100%. For PLA, the time required for biofilm development was 40 d, the denitrification rate was 0.0026 mg-N/(g-PLA.h) and nitrate removal efficiency could also reach 100%. Temperature had a substantial influence on the denitrification performance of both wheat straw and PLA. The FTIR analysis and SEM observation confirmed that wheat straw and PLA were used for denitrification, and explained some reasons for the differences between the two substrates. The wheat straw was superior to PLA when used as carbon source for nitrate removal, in terms of the denitrification rate.

引用

页码：2369 / 2374

页数：6

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