This study evaluated the effect of potassium ferrate(PF)and low-temperature thermal hydrolysis co-pretreatment on the promotion of sludge hydrolysis process and the impact on acid production in the subsequent anaerobi...This study evaluated the effect of potassium ferrate(PF)and low-temperature thermal hydrolysis co-pretreatment on the promotion of sludge hydrolysis process and the impact on acid production in the subsequent anaerobic digestion process.The analytical investigations showed that co-pretreatment significantly facilitated the hydrolysis process of the sludge and contributed to the accumulation of short-chain fatty acids(SCFAs).The pretreatment conditions under the optimal leaching of organic matter from sludge were hydrothermal temperature of 75℃,hydrothermal treatment time of 12 h,and PF dosage of 0.25 g g^(−1)TSS(total suspended solids),according to the results of orthogonal experiments.By pretreatment under proper conditions,the removal rate of soluble chemical oxygen demand(SCOD)achieved 71.8%at the end of fermentation and the removal rate of total phosphorus(TP)was 69.1%.The maximum yield of SCFAs was 750.3 mg L^(−1),7.45 times greater than that of the blank group.Based on the analysis of the anaerobic digestion mechanism,it was indicated that the co-pretreatment could destroy the floc structure on the sludge surface and improve organic matter dissolving,resulting in more soluble organic substances for the acidification process.Furthermore,microbial community research revealed that the main cause of enhanced SCFAs generation was an increase in acidogenic bacteria and a reduction of methanogenic bacteria.展开更多
目的MGAP评分法(Mechanism,Glasgow Coma Scale,Age,and Arterial Pressure)是创伤患者的新方法,但其准确性还缺乏证据支持。本研究旨在评估其在多发伤患者死亡风险评估中的价值。方法纳入2015年4月16日0:00-2016年4月16日24:00,就诊于...目的MGAP评分法(Mechanism,Glasgow Coma Scale,Age,and Arterial Pressure)是创伤患者的新方法,但其准确性还缺乏证据支持。本研究旨在评估其在多发伤患者死亡风险评估中的价值。方法纳入2015年4月16日0:00-2016年4月16日24:00,就诊于四川大学华西医院急诊科,共计375例,分别通过计算入院时的MGAP评分、CRAMS评分(Circulation,Respiration,Abdomen,Motor,and Speech score)、创伤严重度评分(Injury Severe Score,ISS),快速急诊医学评分(Rapid Emergency Medicine Score,REMS)、Sacco评分,qSOFA(The quick Sepsis-related Organ Falure Asessment)评分,以最终死亡为标准对以上创伤评分方法制作受试者工作曲线(ROC曲线),计算曲线下面积,并与损伤严重度评分(ISS评分)进行相关性分析。结果对于多发伤患者28 d死亡ROC曲线分析得出MGAP评分、CRAMS评分、qSOFA评分、REMS评分、Sacco评分评估多发伤患者28 d病死率的AUC分别是0.807、0.800、0.785、0.780、0.773。结论MGAP评分评估方法较简单,可推荐用于多发伤患者的预后评估。展开更多
基金supported by the National Natural Science Foundation of China(No.41276067)the Air Liquide(China)R&D Co.,Ltd.(No.20200216).
文摘This study evaluated the effect of potassium ferrate(PF)and low-temperature thermal hydrolysis co-pretreatment on the promotion of sludge hydrolysis process and the impact on acid production in the subsequent anaerobic digestion process.The analytical investigations showed that co-pretreatment significantly facilitated the hydrolysis process of the sludge and contributed to the accumulation of short-chain fatty acids(SCFAs).The pretreatment conditions under the optimal leaching of organic matter from sludge were hydrothermal temperature of 75℃,hydrothermal treatment time of 12 h,and PF dosage of 0.25 g g^(−1)TSS(total suspended solids),according to the results of orthogonal experiments.By pretreatment under proper conditions,the removal rate of soluble chemical oxygen demand(SCOD)achieved 71.8%at the end of fermentation and the removal rate of total phosphorus(TP)was 69.1%.The maximum yield of SCFAs was 750.3 mg L^(−1),7.45 times greater than that of the blank group.Based on the analysis of the anaerobic digestion mechanism,it was indicated that the co-pretreatment could destroy the floc structure on the sludge surface and improve organic matter dissolving,resulting in more soluble organic substances for the acidification process.Furthermore,microbial community research revealed that the main cause of enhanced SCFAs generation was an increase in acidogenic bacteria and a reduction of methanogenic bacteria.
文摘目的MGAP评分法(Mechanism,Glasgow Coma Scale,Age,and Arterial Pressure)是创伤患者的新方法,但其准确性还缺乏证据支持。本研究旨在评估其在多发伤患者死亡风险评估中的价值。方法纳入2015年4月16日0:00-2016年4月16日24:00,就诊于四川大学华西医院急诊科,共计375例,分别通过计算入院时的MGAP评分、CRAMS评分(Circulation,Respiration,Abdomen,Motor,and Speech score)、创伤严重度评分(Injury Severe Score,ISS),快速急诊医学评分(Rapid Emergency Medicine Score,REMS)、Sacco评分,qSOFA(The quick Sepsis-related Organ Falure Asessment)评分,以最终死亡为标准对以上创伤评分方法制作受试者工作曲线(ROC曲线),计算曲线下面积,并与损伤严重度评分(ISS评分)进行相关性分析。结果对于多发伤患者28 d死亡ROC曲线分析得出MGAP评分、CRAMS评分、qSOFA评分、REMS评分、Sacco评分评估多发伤患者28 d病死率的AUC分别是0.807、0.800、0.785、0.780、0.773。结论MGAP评分评估方法较简单,可推荐用于多发伤患者的预后评估。
