中文摘要：

为了预测固相反硝化反应器出水的硝酸盐浓度，优化工艺参数，以聚羟基丁酸戊酸共聚酯[Poly （3-Hydroxybutyrate-co-3-Hydroxyvalerate），PHBV]作为反应器的碳源和生物膜载体，对受硝酸盐污染的水进行生物反硝化脱氮。采用Box-Behnken试验设计，利用响应曲面法研究了反应器出水硝态氮浓度与进水硝态氮浓度、水力停留时间（hydraulic retention time，HRT）和温度之间的关系，建立了以出水硝态氮浓度为响应值的二次多项式回归模型。该数学模型可以定量描述进水硝态氮浓度、HRT和温度对出水硝态氮浓度的影响，模型预测值与试验值能吻合较好。方差分析结果表明，进水硝态氮浓度、温度和HRT及其交互作用对响应值均具有显著性影响（P＜0.05）。

英文摘要：

Solid-phase denitrification （SPD） process is characterized by insoluble biodegradable polymers used as carbon sources. It is likely to avoid the risk of overdosing of liquid carbon sources in the conventional with the resultant deterioration of the effluent water quality. SPD process has been successfully applied on the treatment of groundwater and wastewater with a low ratio of carbon to nitrogen. This work was carried out in order to predict the nitrate concentration in the treated water and optimize the parameters using SPD process. A laboratory scale reactor was used, which was packed with the poly （3-Hydroxybutyrate-co-3-Hydroxyvalerate） （PHBV） granules as both carbon source and biofilm carrier for nitrate removal from the contaminated water. Based on Box-Behnken experimental design, the relationship among the effluent and influent nitrate-nitrogen concentrations, temperature and hydraulic retention time （HRT） was quantitatively investigated using response surface methodology. The calculated values of the equation were agreed well with the experimentally tested data, and their relative errors ranged from 1.5% to 19%. This equation can quantitatively describe the relationship among the effluent and influent nitrate-nitrogen concentrations, temperature and HRT. Influent nitrate-nitrogen concentration, HRT, temperature and their interaction had significant impacts on the response value by analysis of variance （P〈0.05）.