Ammonia removal from landfill leachate by air stripping and absorption

被引：90

作者：

Ferraz, Fernanda M. ^{[1
]}

Povinelli, Jurandyr ^{[1
]}

Vieira, Eny Maria ^{[2
]}

机构：

[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hydraul & Sanitat, Sao Carlos, SP, Brazil

[2] Univ Sao Paulo, Sao Carlos Chem Inst, Sao Carlos, SP, Brazil

来源：

ENVIRONMENTAL TECHNOLOGY | 2013年 / 34卷 / 15期

基金：

巴西圣保罗研究基金会;

关键词：

ammonium sulphate; aerated packed tower; absorption; heavy metals removal; aquammonia; PRETREATMENT; RECOVERY; NITROGEN; FENTON;

D O I：

10.1080/09593330.2013.767283

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An old landfill leachate was pre-treated in a pilot-scale aerated packed tower operated in batch mode for total ammoniacal nitrogen (TAN) removal. The stripped ammonia was recovered with a 0.4molL(-1) H2SO4 solution, deionized water and tap water. Ca(OH)(2) (95% purity) or commercial hydrated lime was added to the raw leachate to adjust its pH to 11, causing removal of colour (82%) and heavy metals (70-90% for Zn, Fe and Mn). The 0.4molL(-1) H2SO4 solution was able to neutralize 80% of the stripped ammonia removed from 12L of leachate. The effectiveness of the neutralization of ammonia with deionized water was 75%. Treating 100L of leachate, the air stripping tower removed 88% of TAN after 72h of aeration, and 87% of the stripped ammonia was recovered in two 31L pilot-scale absorption units filled with 20L of tap water.

引用

页码：2317 / 2326

页数：10

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