virulency
1. Hepatitis B virul
乙型肝炎病毒
2. since oganic in this pullution are easy to be biodegradation and without a obviously virulency, so we take biochemical treatment as the main resolution of this technological process .
污染物中的有机物较容易生物降解又无明显毒性,因此采用了以生化处理为主的工艺流程。