水热碳化反应(HTC)——营养元素分布随原料性质不同的研究

Hydrothermal carbonization(HTC)——Investigation of the nutrient distribution depending on properties of initial substance

以厌氧发酵后沼渣和脱水污泥的主要成分配制溶液,探索氮、磷、钾三种元素及其相关化合物(K+,NO2-,NO3-,NH4+和PO43)在不同进料情况和预设反应温度下,于水热碳化反应(HTC)后在固、液、气三相中的分布情况。实验结果表明,反应后氮和钾化合物的分布受原料组分和预设反应温度的影响较大;并且相比于氮,钾更难被固定于水热碳中。而磷及其化合物在反应后的分布情况任需要进一步的研究。

To find out the nutrient fate of nitrogen,phosphorus,potassium and their related compounds(K+,NO2-,NO3-,NH4+,and PO43)after Hydrothermal carbonization(HTC),water solutions which contain the same chemical content with biogas residues and sewage sludge are used as feedstock.Results show that the distribution condition of nitrogen and potassium compounds are largely affected by feedstock content and setting reaction temperature.And comparing with nitrogen,potassium is more difficult to be bond in hydrochar after reaction.The distribution condition of phosphorus and its compounds still need further research.