[1]孙盼,黄福珍,余洋,等.天然固态碳源糙米的释碳优化及其反硝化脱氮性能[J].中国给水排水,2024,40(1):15-21.
　SUNPan,HUANGFu-zhen,YUYang,et al.Optimization for Organic Release of Natural Solid Carbon Source Brown Rice and Its Application for Denitrification[J].China Water & Wastewater,2024,40(1):15-21.
点击复制

天然固态碳源糙米的释碳优化及其反硝化脱氮性能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第1期 页码: 15-21 栏目: 出版日期: 2024-01-01
Title:
Optimization for Organic Release of Natural Solid Carbon Source Brown Rice and Its Application for Denitrification
作者:
孙盼1， 黄福珍1， 余洋1， 郑平1,2， 张萌1,2
（1.浙江大学 环境与资源学院，浙江 杭州 310058；2.浙江省水体污染控制与环境安全技术重点实验室，浙江 杭州 310058）
Author(s):
SUN　Pan1， HUANG　Fu-zhen1， YU　Yang1， ZHENG　Ping1，2， ZHANG　Meng1，2
（1. College of Environmental and Resource Science， Zhejiang University， Hangzhou 310058， China； 2. Key Laboratory of Water Pollution Control and Environmental Safety Technology of Zhejiang Province， Hangzhou 310058， China）
关键词:
固态碳源;  糙米;  响应面法;  有机物释放性能;  释碳条件;  反硝化脱氮
Keywords:
solid carbon source;  brown rice;  response surface methodology;  organic release performance;  carbon release condition;  denitrification
摘要:
选取来源广泛、价格低廉的糙米作为典型固态碳源（SCS），采用响应面法Box-Behnken Design模型研究了温度、pH、水力条件等关键参数对其有机物（以COD计）释放性能的影响。结果表明，单因素和复合因素对释碳性能的影响程度排序分别为水力条件>温度>pH、温度-水力条件>pH-水力条件>温度-pH。提出了“强势/联动”优化模式，据此获得糙米的最佳释碳条件，即温度为35 ℃、pH=7、水力条件（以转速计）为61 r/min，有机物释放性能（以单位释碳速率计）可达19.9 mg/（gd）。验证试验表明模型结果准确可靠。固态碳源糙米有机物供给成本最低可达到2.3元/kg，经济性良好。将固态碳源糙米进一步用于反硝化脱氮，总氮去除率和去除速率分别可达到（77.6±7.4）%和24.1 mg/（Ld），显示出较好的应用性能。该研究结果可为糙米等固态碳源在污水处理中的实际应用提供优化方案和技术参数。
Abstract:
In this study, brown rice was selected as the typical natural solid carbon source due to the merits of wide-available and economical-viable. The carbon release parameters of brown rice, including temperature, pH, and hydraulic conditions (HC), were optimized by using Box-Behnken Design model of response surface methodology. The results showed that the effects of individual and combined factors were followed as the order of HC>temperature>pH, and temperature-HC>pH-HC>temperature-pH. The optimal parameters for carbon release from brown rice were 35 ℃, pH=7, and 61 r/min, and then the organic release capacity (in terms of COD release rate per unit SCS) could reach 19.9 mg/(gd). The validation tests showed that the model was accurate and reliable. Furthermore, the economic analysis showed that the cost for organics supply could be as low as 2.3 yuan/kg, which was prior to some conventional carbon sources, e.g., acetate and glucose. The brown rice was used as the carbon source for denitrification, and the total nitrogen removal efficiency and rate were (77.6±7.4)% and 24.1 mg/(Ld), showing bright application prospects. This study can offer technical support and operational parameters for the practical application of brown rice as solid carbon source in wastewater treatment.
更新日期/Last Update: 2024-01-01