Sludge blanket height （SBH） is an important parameter in the clarifier design, operation and control. Based on an overview and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating ...Sludge blanket height （SBH） is an important parameter in the clarifier design, operation and control. Based on an overview and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating a threshold concentration limit into a relative concentration sharp change algorithm to eliminate the disturbance of compression interfaces on the correct simulation of SBH. Pilot-scale test data are adopted to compare reliability of three SBH algorithms reported in literature and the modified SBH algorithm developed in this paper. Calculated results demonstrate that the three SBH algorithms give results with large deviation （〉 50%） from measured SBH, especially under low solid flux conditions. The modified algorithm is computationally efficient and reliable in matching the measured data. It is incorporated into a one- dimensional clarifier model for stable simulation of pilot-scale experimental clarifier data and into dynamic simulation of a full-scale wastewater treatment plant （WWTP） clarifier data.展开更多
The effluent quality from a secondary clarifier in an activated sludge process depends on the performance in the secondary clarifier at great extent. Several models have been developed based on the Kynch solid flux th...The effluent quality from a secondary clarifier in an activated sludge process depends on the performance in the secondary clarifier at great extent. Several models have been developed based on the Kynch solid flux theory to improve the clarifier performance at last decades. This paper proposed a model which is established according to the basis sedimentation process of the secondary clarifier and Kynch flux theory for a clarifier with feedwell in upper of tank and the diffusion effective are combined into the model, which benefts the further improvement of the model and makes the solutions fit to the measurement data in secondary clarifier,展开更多
Background:For long dietary guidelines,it is recommended to avoid foods rich in saturated fatlike Ghrita,also named clarified butter or ghee,which is considered as the culprit of cardiovascular diseases,diabetes,strok...Background:For long dietary guidelines,it is recommended to avoid foods rich in saturated fatlike Ghrita,also named clarified butter or ghee,which is considered as the culprit of cardiovascular diseases,diabetes,stroke,etc.Contradictory to the modern medical science,Ayurveda advocated for numerous benefits of the usage of Ghrita in the judicious manner.This paper systematically reviews and analyses the scientific researches that carried out on the benefits and harms associated with the usage of Ghrita.Methods and Findings:A search over the various search engines like Pubmed,Google was made.The relevant articles and chapters from books retrieved in English language were saved to a folder and analysed for their utility relevant to the topic and the matter was presented in a systematic manner.Results:Ghrita consisted various fats(saturated,monosaturated and polyunsaturated),fatty acids,minerals,vitamins etc.And the composition of Ghrita varies along with the method of preparation.Scientific researches carried out on Ghrita plain as well as medicated have reported about the depressant effects of medicated Ghrita in gross behavioural tests,potentiated phentobarbitone sleeping time,analgesic effect and stimulatory effect on cognition.Further,studies conducted to evaluate the effect of Ghrita on the serum lipid levels showed a dose dependant decrease in the total cholesterol,low density lipoproteins,and very low density lipoproteins.Ghrita was also reported to have wound healing activity.Conclusion:The results of the study suggest the beneficial effects of plain as well as medicated Ghrita on the various components of health and break the myth associated to the exclusion of Ghrita in diet.These researches also substantiate the claims made by the classical texts of Ayurveda.展开更多
目的探究故障模式与失效分析(Failure Mode and Effects Analysis,FMEA)理论结合持续质量改进循环管理(Find-Organize-Clarify-Understand-Select-Plan-Do-Check-Act,FOCUS-PDCA)模式对消毒供应中心复用医疗器械管理质量的影响。方法以...目的探究故障模式与失效分析(Failure Mode and Effects Analysis,FMEA)理论结合持续质量改进循环管理(Find-Organize-Clarify-Understand-Select-Plan-Do-Check-Act,FOCUS-PDCA)模式对消毒供应中心复用医疗器械管理质量的影响。方法以本院2023年1—4月采用常规清洗消毒管理模式进行管理的4562件手术器械为对照组,2023年5—8月行FMEA理论结合FOCUS-PDCA模式后管理的手术器械5628件为观察组,通过FMEA理论识别管理过程中的故障模式,并通过FOCUS-PDCA持续进行针对性的改进,对比2组器械管理不合格率、丢失损坏率、环境卫生学检测情况、团队合作情况、使用满意度、院内感染发生率的差异。结果观察组的器械管理不合格率和丢失损坏率显著低于对照组,环境卫生学检测情况、团队合作情况和手术器械使用满意度显著优于对照组,且院内感染发生率显著低于对照组,差异均有统计学意义(P<0.05)。结论FMEA理论结合FOCUS-PDCA模式能够显著提升消毒供应中心复用医疗器械的管理质量,明显改善消毒供应中心环境卫生情况,还能够提升消毒供应中心工作人员之间的团队合作能力和医生对医疗器械的满意度,降低院内感染的发生率。展开更多
基金supported by the National Natural Science Foundation of China (Grant No.501380107)
文摘Sludge blanket height （SBH） is an important parameter in the clarifier design, operation and control. Based on an overview and classification of SBH algorithms, a modified SBH algorithm is proposed by incorporating a threshold concentration limit into a relative concentration sharp change algorithm to eliminate the disturbance of compression interfaces on the correct simulation of SBH. Pilot-scale test data are adopted to compare reliability of three SBH algorithms reported in literature and the modified SBH algorithm developed in this paper. Calculated results demonstrate that the three SBH algorithms give results with large deviation （〉 50%） from measured SBH, especially under low solid flux conditions. The modified algorithm is computationally efficient and reliable in matching the measured data. It is incorporated into a one- dimensional clarifier model for stable simulation of pilot-scale experimental clarifier data and into dynamic simulation of a full-scale wastewater treatment plant （WWTP） clarifier data.
文摘The effluent quality from a secondary clarifier in an activated sludge process depends on the performance in the secondary clarifier at great extent. Several models have been developed based on the Kynch solid flux theory to improve the clarifier performance at last decades. This paper proposed a model which is established according to the basis sedimentation process of the secondary clarifier and Kynch flux theory for a clarifier with feedwell in upper of tank and the diffusion effective are combined into the model, which benefts the further improvement of the model and makes the solutions fit to the measurement data in secondary clarifier,
文摘Background:For long dietary guidelines,it is recommended to avoid foods rich in saturated fatlike Ghrita,also named clarified butter or ghee,which is considered as the culprit of cardiovascular diseases,diabetes,stroke,etc.Contradictory to the modern medical science,Ayurveda advocated for numerous benefits of the usage of Ghrita in the judicious manner.This paper systematically reviews and analyses the scientific researches that carried out on the benefits and harms associated with the usage of Ghrita.Methods and Findings:A search over the various search engines like Pubmed,Google was made.The relevant articles and chapters from books retrieved in English language were saved to a folder and analysed for their utility relevant to the topic and the matter was presented in a systematic manner.Results:Ghrita consisted various fats(saturated,monosaturated and polyunsaturated),fatty acids,minerals,vitamins etc.And the composition of Ghrita varies along with the method of preparation.Scientific researches carried out on Ghrita plain as well as medicated have reported about the depressant effects of medicated Ghrita in gross behavioural tests,potentiated phentobarbitone sleeping time,analgesic effect and stimulatory effect on cognition.Further,studies conducted to evaluate the effect of Ghrita on the serum lipid levels showed a dose dependant decrease in the total cholesterol,low density lipoproteins,and very low density lipoproteins.Ghrita was also reported to have wound healing activity.Conclusion:The results of the study suggest the beneficial effects of plain as well as medicated Ghrita on the various components of health and break the myth associated to the exclusion of Ghrita in diet.These researches also substantiate the claims made by the classical texts of Ayurveda.
文摘目的探究故障模式与失效分析(Failure Mode and Effects Analysis,FMEA)理论结合持续质量改进循环管理(Find-Organize-Clarify-Understand-Select-Plan-Do-Check-Act,FOCUS-PDCA)模式对消毒供应中心复用医疗器械管理质量的影响。方法以本院2023年1—4月采用常规清洗消毒管理模式进行管理的4562件手术器械为对照组,2023年5—8月行FMEA理论结合FOCUS-PDCA模式后管理的手术器械5628件为观察组,通过FMEA理论识别管理过程中的故障模式,并通过FOCUS-PDCA持续进行针对性的改进,对比2组器械管理不合格率、丢失损坏率、环境卫生学检测情况、团队合作情况、使用满意度、院内感染发生率的差异。结果观察组的器械管理不合格率和丢失损坏率显著低于对照组,环境卫生学检测情况、团队合作情况和手术器械使用满意度显著优于对照组,且院内感染发生率显著低于对照组,差异均有统计学意义(P<0.05)。结论FMEA理论结合FOCUS-PDCA模式能够显著提升消毒供应中心复用医疗器械的管理质量,明显改善消毒供应中心环境卫生情况,还能够提升消毒供应中心工作人员之间的团队合作能力和医生对医疗器械的满意度,降低院内感染的发生率。
