生物碳滤出液对小球藻生长的影响

The Effect on the Growth of Chlorella by the Filtrates from Washed Biochars

生物碳是农业废弃生物质经裂解制备的富含有机碳和矿物质、结构复杂的碳材料。生物碳已被广泛应用于促进植物生长、增强环境生态修复,但是关于生物碳浸出液对水生生物的影响的研究还十分少。采用不同温度制备的生物碳的滤出液培养小球藻,研究不同滤出液对小球藻生长的影响。研究结果表明,随着生物碳裂解温度的升高,小球藻的生长逐渐变差:300℃生物碳滤出液培养小球藻的生物质总量最高,其次是500℃,最差的是700℃。另外,通过对滤出液成分的分析,发现影响小球藻的主要因素是滤出液的有机碳含量和p H。随着生物碳制备温度的升高,溶出的有机碳含量减少和p H升高,抑制了藻类的生长。

Biochar, which derived from agricultural wastes, has already widely used to increase the growth ofagricultural plant as well as environmental restoration. The advantage of the filtrates of wstudy the influence from these residues’ nutrition on the growth of chlorella. The research resucreasing pyrolytic temperature resulted of a worse growtli of chlorella. The highest total biomass of chlorella was from the filtrates obtained form 300 V biochar, then was 500 V , and the smallest one was from 700 V . Through the compositional analysis, the most important two key factors were found the influenced that growtli of chlorella were the organic carbon content and pH. Increasing the pyrolytic temperature will decrease the dissolution of organ-ic carbon content and increase pH, therefore inhibit the growth of algae.