Zhang Shihua, Chen Zhiqiang, Wen Qinxue, Ma Jiangya, He Zhonghua
School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243002, China; State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China.
Chemosphere. 2016 Jul;155:358-366. doi: 10.1016/j.chemosphere.2016.04.051. Epub 2016 Apr 30.
To investigate characteristics of water-extractable organic matter (WEOM) from different stages and evaluate the maturity for co-composting penicillin mycelial dreg (PMD) via fluorescence regional integration (FRI) of fluorescence excitation-emission matrix (EEM), a pilot-scale co-composting was carried out. The results showed that a classical temperature profile showed and a degradation rate of 98.1% for residual penicillin was obtained on the 6th day. DOC and DOC/DON ratio were in a low level of 4.0 g kg(-1) and 3.7, respectively, after the 32nd day. In addition, respirometric rate (SOUR) decreased to 0.87 mg O2 g(-1) VS h(-1) finally. The EEM showed that the specific Ex/Em peak related to microbial byproduct-like vanished on the 32nd day, while those related to fulvic-like and humic acid-like appearing on the 24th day. The fluorescence regional integration (FRI) results demonstrated that PV,n/PIII,n increased to 3.28 finally, suggesting a desirable maturity for co-composting PMD. The EEM-FRI consequently has the potential for characterizing the WEOM from the co-composting of PMD.
为了通过荧光激发-发射矩阵（EEM）的荧光区域积分（FRI）研究不同阶段水可提取有机物（WEOM）的特性，并评估青霉素菌丝渣（PMD）共堆肥的成熟度，进行了中试规模的共堆肥试验。结果表明，呈现出典型的温度曲线，在第6天残余青霉素的降解率达到98.1%。在第32天后，溶解性有机碳（DOC）和DOC/溶解性有机氮（DON）比值分别处于4.0 g kg⁻¹和3.7的低水平。此外，呼吸速率（SOUR）最终降至0.87 mg O₂ g⁻¹ VS h⁻¹。EEM显示，与微生物副产物类相关的特定激发/发射峰在第32天消失，而与富里酸类和腐殖酸类相关的峰在第24天出现。荧光区域积分（FRI）结果表明，PV,n/PIII,n最终增加到3.28，表明PMD共堆肥达到了理想的成熟度。因此，EEM-FRI有潜力用于表征PMD共堆肥中的WEOM。
