期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jwpe.2019.101099
关键词
Phenol; Thiocyanate; Alkalinity; Horizontal flow constructed wetland; Total nitrogen; Typha angustifolia
The objective of the present study was to achieve treatment of phenol, thiocyanate and ammonia containing wastewater in a horizontal subsurface flow constructed wetland. Influent wastewater contained acetate of 850 mg/L, phenol of 92 mg/L, thiocyanate of 45 mg/L, ammonium nitrogen of 88 mg/L with chemical oxygen demand of 624 mg/L. The system was operated under aerial organic loading of 24.5 g COD/m(2) d and volumetric organic loading of 65.4 g COD/m(3) d. The CW was divided into four zones (zones I to IV) and operated in continuous flow mode at hydraulic retention time (HRT) of 3 days. Typha angustifolia was planted in zone I, II and IV. Increase in ambient temperature improved pollutant removal in CW. Intermittent aeration and feed sodium acetate (carbon source) had a negligible effect on the performance of the CW. Phenol and COD removals were 99 % and 93 %, respectively and zone 1 was highly efficient for removal of organics. Feed alkalinity addition improved thiocyanate removal to 91 % and sulphate concentration increased in the effluent. Thiocyanate biodegradation followed both aerobic and anaerobic pathways. Ammonia nitrogen and total nitrogen removal efficiencies varied between 17-30 % and 7-28 %, respectively, and the removal might be mainly due to plant uptake. Typha angustifolia grew well in the wetland without showing any toxicity effects.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据