保险条款下消防设计的若干特点

针对保险条款下的消防设计进行了探讨,对消防要求高于中国的规范和工程标准的主要内容进行总结,得出保险条款下消防设计的若干特点,为今后的消防设计提供参考。     

SBR好氧污泥颗粒的脱氮性能研究

The sequencing batch reactor （SBR） was started up by seeding the anaerobic granular sludge and the aerobic granular sludge was successfully cultivated. The performance characteristic of the aerobic granules for nitrogen removal was investigated in detail. The experimental results demonstrated the relationship between operational parameters [dissolved oxygen （DO） and pH] and variation of chemical oxygen demand （COD）, ammonium （NH4^＋-N） and total nitrogen （TN）. In continuous flow pattern, COD was too low in the reactor at the later stage of a cycle, which restrained denitrification and decreased the removal of nitrogen, while in discontinuous flow pattern, the carbon source could be supplemented in time, which improved denitrification and increased the removal of TN from 66% to 81%.     

自控电伴热带的施工方法

自控仪表遇到测流体压力、流量、液位的仪表及管路有防冻要求时需对其进行伴热保温，方法主要有蒸汽伴热及电伴热两种。电伴热以电热元件为热源，伴热温度可通过温度控制器精确地控制，整个管路加热均匀。