CAJ | 학술논문

以市政污泥为原料，在300、500、700℃条件下热解制备得到污泥生物炭。采用碱液吸收法测定生物炭在培养环境下的CO2释放速率以表征其降解速率，并采用预测模型计算得到生物炭的半衰期。以去离子水为浸提剂考察了生物炭中可溶性养分含量及其淋溶特性。结果表明：在300～700℃范围内，较高温度下制备的生物炭降解缓慢，稳定性更强，可在自然环境中长期存在，具有更好的固碳效果；较低温度下制备的生物炭中水溶性氮、水溶性钾含量更高，但水溶性磷含量更低；生物炭中养分的淋溶效果与其可溶性养分含量一致，较低温度下制备的生物炭的淋溶液中水溶性氮、水溶性钾含量较高，水溶性磷含量较低。
이시정오니위원료，재300、500、700℃조건하열해제비득도오니생물탄。채용감액흡수법측정생물탄재배양배경하적CO2석방속솔이표정기강해속솔，병채용예측모형계산득도생물탄적반쇠기。이거리자수위침제제고찰료생물탄중가용성양분함량급기림용특성。결과표명：재300～700℃범위내，교고온도하제비적생물탄강해완만，은정성경강，가재자연배경중장기존재，구유경호적고탄효과；교저온도하제비적생물탄중수용성담、수용성갑함량경고，단수용성린함량경저；생물탄중양분적림용효과여기가용성양분함량일치，교저온도하제비적생물탄적림용액중수용성담、수용성갑함량교고，수용성린함량교저。
The biochar was produced from sewage sludge by pyrolysis at 300, 500 and 700℃. In this study the biochar degradation rate represented by CO2 release rate through alkali absorption method in microbial incubation was investigated and the half-life using a recommended prediction method was predicted. In addition, deionized water was used to investigate the content and leaching properties of the water-soluble nutrients contained in biochar. During the temperature range of 300—700℃, the biochar produced at higher temperature was degraded slowly and had longer half-life, which may exist in soil for a longer time span and then perform a better effect on carbon sequestration than that produced at lower temperature. However, biochar produced at lower temperature contained more water-soluble N and K but less water-soluble P, which was agreed with the concentration of leaching nutrients. The leaching water of biochar produced at lower temperature also contained more much water-soluble N and K but less water-soluble P.