Biomass Engineering Center, Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
Biomass Engineering Center, Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
Chemosphere. 2020 Jun;248:125927. doi: 10.1016/j.chemosphere.2020.125927. Epub 2020 Jan 20.
Composting is an acceptable and economically feasible process for recycling agricultural biomass waste. The addition of external additives to adjust the process of composting has been attracted lots of research attention. To investigate the effects of external additives on nutrients transformation process of composting, a laboratory reactors scale co-composting based on swine manure and corn straw (CK) with the additives of phosphate (MP), calcium bentonite (CB) and biochar (BC) were performed for 30 days. The results showed the addition of phosphate and biochar could contribute to accelerating temperature rise and shorten the thermophilic phase. The germination index (GI) of MP and BC achieved 180% and 150%, respectively. The excitation-emission matrix (EEM) demonstrated the intensities of the peak C (humic acids) of the MP treatment was 829.5, and the P/P value (9.59) of MP treatment was particularly higher compared to other three treatments according to the fluorescence regional integration (FRI) analysis. The Fourier Transform Infrared spectroscopy (FTIR) indicated the rate of decomposition of aliphatic C substances was higher than that of aromatic C substances. According to the X-ray diffraction (XRD) spectra results, characteristic peaks at both 16° and 22° were decreased, indicating cellulose and amorphous components were degraded. It further proved the formation of struvite component in MP treatment. Therefore, based on the maturity indicators, EEM and XRD results, phosphate is an efficient additive and recommended for swine manure and corn straw co-composting.
堆肥是一种可接受且经济可行的农业生物质废物回收方法。添加外部添加剂来调节堆肥过程已经引起了许多研究关注。为了研究外部添加剂对堆肥过程中养分转化的影响，进行了基于猪粪和玉米秸秆（CK）的实验室反应堆规模共堆肥实验，添加了磷酸盐（MP）、钙基膨润土（CB）和生物炭（BC）作为添加剂，共进行了 30 天。结果表明，添加磷酸盐和生物炭可以促进温度升高，并缩短高温期。MP 和 BC 的发芽指数（GI）分别达到了 180%和 150%。激发发射矩阵（EEM）表明，MP 处理的 C 峰（腐殖酸）强度为 829.5，根据荧光区域积分（FRI）分析，MP 处理的 P/P 值（9.59）明显高于其他三种处理。傅里叶变换红外光谱（FTIR）表明，脂肪族 C 物质的分解速率高于芳香族 C 物质。根据 X 射线衍射（XRD）图谱结果，16°和 22°处的特征峰都降低了，表明纤维素和无定形成分被降解。这进一步证明了 MP 处理中形成了鸟粪石成分。因此，根据成熟度指标、EEM 和 XRD 结果，磷酸盐是一种有效的添加剂，推荐用于猪粪和玉米秸秆共堆肥。
