Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 2

年份

2023 1

2008 1

关键词

检索范围：

排序：展示方式：

Clean air captures attention whereas pollution distracts: evidence from brain activities

《环境科学与工程前沿（英文）》 2023年第18卷第4期 doi: 10.1007/s11783-024-1801-x

摘要：

● We find air pollution distracts attention and reveal the neurocognitive mechanisms.

关键词： Air pollution Attention Disengagement Performance Event-related potential

HTML PDF 收藏

Performance of completely autotrophic nitrogen removal over nitrite process under different aeration modes and dissolved oxygen

GUO Jinsong, YANG Guohong, FANG Fang, QIN Yu

《环境科学与工程前沿（英文）》 2008年第2卷第4期页码 439-445 doi: 10.1007/s11783-008-0046-4

摘要： In this study, three sequential batch biofilm reactors (SBBRs) were operated for 155 days to evaluate the performance of completely autotrophic nitrogen removal over nitrite (CANON) process under different aeration modes and dissolved oxygen (DO). Synthetic wastewater with 160-mg NH-N/L was fed into the reactors. In the continuously-aerated reactor, the efficiency of the ammonium nitrogen conversion and total nitrogen (TN) removal reached 80% and 70%, respectively, with DO between 0.8–1.0 mg/L. Whereas in the intermittently-aerated reactor, at the aeration/non-aeration ratio of 1.0, ammonium was always under the detection limit and 86% of TN was removed with DO between 2.0–2.5 mg/L during the aeration time. Results show that CANON could be achieved in both continuous and intermittent aeration pattern. However, to achieve the same nitrogen removal efficiency, the DO needed in the intermittently-aerated sequential batch biofilm reactor (SBBR) during the aeration period was higher than that in the continuously-aerated SBBR. In addition, the DO in the CANON system should be adjusted to the aeration mode, and low DO was not a prerequisite to CANON process.

关键词： Synthetic wastewater process Whereas biofilm detection