Carbon and nitrogen removal from low-strength domestic wastewater with a two-stage submerged biological filter

被引:11
作者
De Feo, Giovanni [1 ]
机构
[1] Univ Salerno, Dept Civil Engn, I-84084 Fisciano, SA, Italy
来源
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2007年 / 42卷 / 05期
关键词
low-strength domestic wastewater; methanol; pilot plant; post-denitrification; secondary nitrification; submerged biological filters;
D O I
10.1080/10934520701244425
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The aim of the present study was to evaluate the secondary and tertiary treatment of low -strength domestic wastewater with submerged biological filters (BFs). The experiments were carried out with a two-stage pilot plant consisting of two subsequent filter columns. In the first aerated reactor, the removal of carbon and nitrification was accomplished (secondary nitrification); while, in the second anoxic reactor a post-denitrification process with methanol as external carbon source was performed. During the 3 months of experimental period, in average terms, Total Suspended Solids (TSS) concentrations of 156 mg/L were reduced to 5 mg/L; Chemical Oxygen Demand (COD) concentrations of 179 mg/L were reduced to 43 mg/L. In the secondary nitrification, mean influent NH4+ concentrations of 6.1 mg/L were reduced to average values of 1.8 mg/L. During the post-denitrification, mean influent NO3- concentrations of 12.0 mg/L were reduced to average values of 6.1 mg/L. The overall process produced a backwashing effluent with an average concentration of about 175 mg/L of TSS.
引用
收藏
页码:641 / 647
页数:7
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