Screening and Identification of Two Heterotrophic Nitrifiers and Growth Characteristic Research

摘要：

The superiority of heterotrophic nitrifiers over the traditional autotrophic nitrifiers makes heterotrophic nitrifiers become the focus in actual wastewater treating processes. The primary objetives of this study were: (ⅰ) to screen out heterotrophic nitrifiers from bio-ceramic reactor which can effectively remove the ammonium; (ⅱ) to identify strains through method of morphology and phylogenies analysis; (ⅲ) to study the strains characteristic of growth, the ammonia nitrogen removal, the COD degeneration. Through the strain morphology and the phylogenetic analysis, the isolated strain Z5 was preliminarily identified as the Pseudomonas aeruginosa, and Z8 was identified as the Acinetobacter sp. They all grow quickly .The Generation time G(Z5)=3.33h ,the specific growth rate μ(Z5)=0.30 h-1, G(Z8)=3.65h, μ(Z8)=0.274 h-1.The COD degeneration rate of Z5 was 56.45 mg/(L·h), and the COD degeneration rate of Z8 was 86.78 mg/(L·h). According to the high growth speed and high COD degeneration ability, Z5 and Z8 were supposed to be heterotrophic nitrifiers. The isolated strains Z5 and Z8 could quickly remove the ammonia nitrogen. After 28h cultivation, their ammonia nitrogen removal rate achieved 86.49％ and 86.75％, respectively .They both achieved good heterotrophic nutrition effect. Z5 and Z8 have extensive appliance and wide foreground in actual wastewater treating processes.

关键词： heterotrophic nitrifiers phylogenetic analysis growth characteristic generation time specific growth rate

作者: YANG Jixian WANG Qiang GAO Shanshan MA Fang

作者单位: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China

会议类型: 国际会议

会议名称: 2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-11-13（万方平台首次上网日期，不代表论文的发表时间）