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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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污水氮磷浓度对云南本地浮萍生长及氮磷去除的影响
DOI: 10.3724/SP.J.1145.2014.00056, PP. 56-62
Keywords: 浮萍,氮磷浓度,生长,氮磷含量,氮磷去除率,ph,污水处理
Abstract:
为揭示污水氮磷浓度对不同浮萍生长及水处理的影响规律，研究了户外条件下云南本地的4个浮萍品种，本地绿萍（lemnajaponica）、本地少根（landoltiapunctata）、本地多根（spirodelapolyrhiza）和本地芜萍（woffiaglobosa）在不同氮磷浓度污水中的生长情况.结果表明：随着污水氮磷浓度升高，浮萍处理系统对氮磷的去除总量升高，利用率降低；不同浮萍品种在不同氮磷浓度污水中的最大生长速率、氮磷含量和氮磷固定能力存在明显的种属差异.其中本地多根有最高的生长速率（7.38gm-2d-1）和氮固定能力（336.47mgm-2d-1），本地绿萍有最高的磷含量（2.35%）和磷固定能力（123.07mgm-2d-1），本地芜萍有最高的蛋白含量（37.32%）.针对本地绿萍的进一步研究表明：本地绿萍在不同氮磷浓度污水中的生长与体内的氮磷含量和ph有关，高氮磷含量的本地绿萍可以利用体内储存的氮磷在寡营养水体中短时间内进行快速生长；废水的氨氮浓度小于20mgl-1，ph8(±0.5)时本地绿萍生长较快；当废水氨氮浓度大于20mgl-1时，ph6.5(±0.5）时可防止nh4+大量转化为nh3，减少对本地绿萍的毒害作用.本研究揭示了污水氮磷浓度对不同浮萍品种的生长、氮磷含量和氮磷去除的影响不同，实际应用中可根据不同的目的选用不同的浮萍品种.
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