Details

Autor(en) / Beteiligte

• Liu, Chun
• Huang, Xia
• Yang, Jing-liang

Titel

Leakage and survival of genetically engineered microorganism in the environment applied for wastewater bioaugmentation treatment

Ist Teil von

• Huanjing kexue, 2008-09, Vol.29 (9), p.2571

Ort / Verlag

China

Erscheinungsjahr

2008

Quelle

MEDLINE

Beschreibungen/Notizen

• Genetically engineered microorganism (GEM) leaking from bioreactors to natural environment will lead to potential ecological risk when applied for wastewater bioaugmentation treatment. An atrazine-degrading GEM was used in a conventional activated sludge bioreactor (CAS) and a membrane bioreactor (MBR) to investigate leaking density of GEM. in the effluent. Survival of GEM in the simulated natural environments after leakage was also explored. The results showed that the maximum leakage happened at the initial time of GEM inoculation. When inoculating density was 10(10) CFU/mL, the maximum leaking density from CAS was close to inoculating density as well as the maximum leaking density from MBR was only 10(2) CFU/mL. Leaking density was the key factor influencing GEM survival in the simulated environments. When leaking density from CAS reached to 10(10) CFU/mL, GEM with high density would survive in the simulated water and soil environments for a long time (more than 30 d), which would lead to high potential ec