摘要
为探讨污水深度处理和同步获取产油微藻的可行性,建立光生物反应器,应用微拟球藻去除污水和中水中的氮磷,并分析不同浓度的Fe3+和Zn2+离子对微藻的生长和油脂积累的影响,从而在净化污水的同时培养微藻获得富油生物质。结果表明,该藻对污水氮磷具有较强的去除能力,可在13 d内,去除水体中96%的氨氮和94%的磷,同时化学需要氧量(COD)的去除率可达72.9%。在生活污水中培养至第16天,微藻的细胞密度可达4.55×106cell/m L。Fe3+浓度对微拟球藻的生长具有显著影响(P<0.05),当铁浓度为36μmol/L时,微拟球藻的细胞密度最高可达到9.94×106cell/m L。该研究以中水和生活污水为基质培养微拟球藻,同时获取微藻油脂,为污水中氮磷的去除和能源的同步获取提供了新途径。
To explore the feasibility of purifying urban sewage and harvesting oil-production microalgae simultaneously,Nannochloropsis sp. was employed to remove the nitrogen（ N） and phosphorus（ P） from sewage and recycled water. At the same time,effects of iron（ Fe3 ＋） and zinc（ Zn2 ＋） on growth and lipid accumulation of Nannochloropsis sp. were investigated to enhance urban sewage purification and microalgae cultivation. Results indicated that the microalgae showed a high capacity for urban sewage purification and removed 96% of ammonia nitrogen（ NH3-N）,94% of P,and 72. 9% of chemical oxygen demand（ COD） from urban sewage over13 days. The cell density reached 4. 55 × 106 cell / m L in 16 days. Fe3 ＋presented significant impacts on the growth of Nannochloropsis sp.（ P 〈0. 05）. The cell density approached 9. 94 × 106 cell / m L with 36 μmol / L of Fe3 ＋. By cultivating Nannochloropsis sp. and obtaining lipids in urban sewage,this study provides new approaches for removing N and P while simultaneously obtaining an energy source.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第5期2367-2374,共8页
Chinese Journal of Environmental Engineering
基金
山东省中青年科学家科研奖励基金项目(BS2011NJ018)
教育部新世纪优秀人才支持计划(NCET-12-0501)
关键词
微拟球藻
城市污水
油脂
氮磷去除
Nannochloropsis sp.
urban sewage
lipid
removal of nitrogen and phosphorus
