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Foam fractionation is a green and economical primary separation technique and it has excellent application prospect in the field of food industry. However, it is difficult to simultaneously obtain the high values of enrichment ratio and recovery percentage in a batch operation of foam fractionation due to the opposite effects of operating parameters on interfacial adsorption and foam drainage. In order to solve this problem, multiple process intensification strategies of foam fractionation are developed. In this work, the current studies on the intensification methods of interfacial adsorption and foam drainage were firstly reviewed. The advantages and disadvantages of these methods are analyzed. Subsequently, the research progress of foam fractionation in the separation of proteins, enzymes, saponins, polyphenols and biological preservatives are summarized. Based on the literature review and problem analysis, three future research respects are proposed to promote the industrial application of foam fractionation: Developing new methods which would simultaneously improve interfacial adsorption and foam drainage, designing new collectors with strong binding specificity for non-surface-active materials and good reusability, and inhibiting protein denaturation during desorption process.

The quasi-stationary front in Yunnan and Guizhou is one of the most important weather systems in Guizhou in winter， and it is difficult to forecast.This paper analyzes the winter climate characteristics of the quasi-stationary front in Yunnan and Guizhou and frontal rainfall characteristics of different magnitudes in Guizhou by using the daily ground conventional observation station data of five provinces （cities， districts） of Yunnan， Guizhou， Sichuan， Chongqing， Guangxi from 2007 to 2021 and the daily precipitation data of Guizhou from 08:00 to 08:00.The results show that： （1） There are 52.8 days of the quasi-stationary front weather in Guizhou in winter on average.The impact of the quasi-stationary front is most serious in January， followed by February and December.（2） In winter， the front direction of the quasi-stationary front in Yunnan and Guizhou is the most south-north type， averaging near Qujing； The second is the northwest southeast type， which is located in the west of Guizhou on average； There are few east-west types； The moderate intensity quasi-stationary front is the most and tends to occur in the early winter， the strong quasi-stationary front is the second and tends to occur in the late winter， and the weak quasi-stationary front is the least.（3） The frontal precipitation is dominated by rainfall （rain or freezing rain）.The stronger the quasi-stationary front is， the fewer the days of frontal precipitation are， and the proportion of the days of frontal precipitation increases with the weakening of the quasi-stationary front； The frontal rainfall is mainly concentrated below 5.0 mm， and the frontal rainfall probability is inversely proportional to the rainfall and is proportional to the rainfall range.When the frontal rainfall is weak， the frontal rainfall probability is unimodal with the increase of rainfall and bimodal with the expansion of rainfall range.（4） The results of EOF and REOF classification show that there are two types of frontal precipitation with different magnitudes that affect Guizhou： the frontal precipitation in the central and eastern regions is mostly in the early winter and more south-north， with moderate or weak intensity and prone to large-scale rainfall of 0.1~1.0 mm magnitude； The southwest type frontal rainfall is mostly in the late winter， and it is mostly north-south type or north-west southeast type.The intensity is strong， and the small-scale rainfall of 1.1~5.0 mm is easy to occur.（5） The climate tendency rate of the average annual rainfall in the middle-east type is negative， and the cumulative anomaly changes are roughly in the "M" shape； The climate tendency rate of annual average rainfall in the southwest type is positive， with obvious stage characteristics， and the cumulative anomaly changes are roughly "W" shaped； Both of them have quasi 4 years and quasi 8 years periodic oscillations； In recent years， the frontal rainfall in the middle-east has decreased， while that in the southwest has increased.The results can provide an important climate background for the prediction of quasi - stationary front weather in winter in Guizhou.

Dairy wastewater is a typical food-processing wastewater. The direct discharge of dairy wastewater is easy to cause serious pollution of accepting water body due to its characters of large discharging amount, high organic content and weak water's quality stability. The advanced treatment and resources recycling of dairy wastewater have become a key to achieving the sustainable development of dairy industry. In this work, the current researches on the treating methods and resources recovery of dairy wastewater are reviewed. Though analyzing the advantages and application bottlenecks of various methods, a comprehensive strategy integrating foam fractionation, sequencing batch reactor (SBR) and membrane separation is proposed. Firstly, foam fractionation have been used to recover casein from dairy wastewater. The precipitates in the foamate could be used as the feed additives of livestock. The foamate could be served as the fermentation medium of microorganisms for synthesizing biofuels or constructing microbial fuel cells. Subsequently, SBR method is used to further reduce the chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and phosphate content in the effluent. Finally, the nitrites in the effluent of SBR are removed by using membrane separation and they would be used in biofertilizer production. The advanced treatment period of dairy wastewater in this strategy is short and the resources recovery from the concentrated solutions is easy to perform. Furthermore, the dilute solution of membrane separation could be used in circulation cooling operation and farm irrigation.

Objective To provide reference for formulating relatively unified quality control strategies and meeting the requirements of homogenization construction of blood banks across Chongqing area by retrospectively analyzing sampling results of different blood components during the past two years in all levels of blood banks in Chongqing area. Methods The key quality data of blood components prepared by 6 blood banks in Chongqing were analyzed retrospectively. According to the issuing units to the clinical during the past two years, the research objects were selected as leukocyte-depleted suspended RBCs, cryoprecipitate, pathogen inactivated fresh frozen plasma(FFP) and apheresis platelets. The quality data of the above-mentioned blood components from January 2019 to June 2021 were collected and analyzed. Results For leukocyte-depleted suspended RBCs(1U)prepared by 5 blood banks, statistically significant differences in Hb, residual white blood cells and hemolysis rate at the end of storage, except for Hct, were noticed(P

A blockchain technology based on practical Byzantine fault tolerance (PBFT)algorithm was proposed.First of all, the traditional practical Byzantine fault tolerant algorithm was explained.The traditional algorithm included six phases: pre-stage, demand, pre-preparation, preparation, confirmation, and response.However, traditional algorithms had the disadvantages of poor real-time performance, lack of penalty mechanisms, and high bandwidth.In response to these problems, the traditional algorithm was improved, which specifically involved the accounting node, the consensus process, and the view switching process.The feasibility of the improved algorithm was further proved by testing.Applying this algorithm to power grid enterprises, the federal reserve system was implemented by the constructedvirtual warehouse, which also reduced the consumption of inventory funds.And the efficiency of inventory management in power grid enterprises was improved.