Amendment with treated biosolids can increase soil fertility and plant nutrition to the soil, but the fertilization value compared with other commercial soil amendments on the soil ecosystem is poorly understood. The effects of different proportions (0%, 5%, 10%, and 15%) of thermal and pH-treated biosolid applications on the growth performance, nutrient contents, and toxicity performance of carrots (Daucus carota L.) and choy sum (Brassica chinensis var. parachinensis) were studied. Different commercial organic soil amendments, such as biochar, chicken manure (CM), and food waste compost (FWC), were also used as a comparison in the experiment to determine the feasibility of biosolid application on agricultural use. All four soil amendments resulted in similar growth trends for the carrots and choy sum, and this information can be applied in selecting the appropriate species of plants. Through thermal and pH treatments, the treated biosolids decreased environmental risks and resulted in higher amounts of N and P in comparison to the other soil amendments. The results showed that 10% biosolid-amended soil performed best in terms of plant growth, biomass, and nutrient content for both carrots and choy sum. Nutrient analysis (N, P, and K) and heavy metal analysis (As, Cd, and Pb) on both soil and plants were conducted. It was proven that biosolid application was as functional as CM application and could be used as organic fertilizer to replace biochar and FWC for agricultural use. No heavy metals were found in the pure biosolids, which were safe to use as fertilizers. Utilizing biosolids as fertilizers could be an effective way to address the problem of waste disposal and landfill loading for the environment.

用处理过的生物固体进行的改良可以增加土壤的肥力和植物对土壤的营养，但是与土壤生态系统上其他商业化土壤改良剂相比，其施肥价值知之甚少。不同比例（0％，5％，10％和15％）的热和pH处理的生物固体施肥对胡萝卜（Daucus carota L.）和菜的生长性能，营养成分和毒性的影响小白菜变种菜心）进行了研究。在实验中还使用了不同的商业有机土壤改良剂，例如生物炭，鸡粪（CM）和食物垃圾堆肥（FWC）作为比较，以确定将生物固体应用于农业的可行性。四种土壤改良剂均使胡萝卜和菜豆的生长趋势相似，该信息可用于选择合适的植物种类。通过热处理和pH处理，与其他土壤改良剂相比，处理过的生物固体降低了环境风险，并导致了更高的氮和磷含量。结果表明，就胡萝卜和小菜而言，10％生物固体改良土壤在植物生长，生物量和养分含量方面表现最佳。营养分析（N，P和K）和重金属分析（As，Cd，和Pb）在土壤和植物上进行。事实证明，生物固体施用与CM施用具有相同的功能，可以用作有机肥料替代农业用生物炭和FWC。在纯生物固体中未发现重金属，可以安全地用作肥料。利用生物固体作为肥料可能是解决废物处置和环境填埋量问题的有效方法。