Research On The Utilization Of Solid Waste In Beer Brewery

In recent years,China's beer industry has developed rapidly,and the output has been ranked the first in the world for many years.The pressure of treatment and disposal of brewery solid waste brought by high output is also increasing day by day.At present,the whole society has reached a consensus that solid waste should be treated with recycling technique.From the perspective of actual production of enterprises and application prospects in the industry,waste diatomite and waste yeast have the most research and application value.The specific research is listed as follows:?1?Hydrothermal treatment of waste diatomite generated from brewery was carried out.The range of optimum treatment temperature and treatment time of waste diatomite treated by hydrothermal method was investigated.According to the characterization analysis of processed diatomite:the optimum treatment temperature is of 160²00?,the optimum treatment time is of 6¹0h.Thus the porous property of diatomite is restored at a low cost.?2?The hydrothermally treated diatomite was added into the acrylic waterborne anticorrosive coatings as fillers.The seeded emulsion polymerization of preparing water-soluble acrylic resin emulsion for waterborne coatings,as well as improvement effect of diatomite performance,was studied.Methyl methacrylate?MMA?,butyl acrylate?BA?,glycidyl methacrylate?GMA?and acrylic acid?AA?is 32.8%:32.8%:32.8%:1.6%as the best mass ratio of monomer;the total content of composite emulsifier made up of sodium dodecyl sulfate?SDS?,polyethylene glycol octyl phenyl ether?OP-10?and tween-80 is 9%;1%of ammonium persulfate?APS?was added as the initiator,and the polymerization temperature is of 75⁸5?.1%of defoaming agent,4%of of thickening agent,2%of leveling agent,and 2%of wetting agent were added into the resin emulsion which were manufactured into paint,and the adhesion can be up to 4B and the hardness is H.The quality of the adhesion can be improved after adding 1%⁵%of hydrothermally treated diatomite.?3?Composite ceramic were prepared with brewery waste diatomite?BWD?and water treatment sludge?WTS?as main raw materials,and proper amount of CaO as auxiliary materials.Raw material ratio and preparation process of composite ceramisite prepared by roasting method were investigated.BWD/WTS composite ceramisite without CaO can not be successfully prepared.The best raw material ratio of BWD/WTS/CaO is8:2:1.The optimum preparation parameters are as follows:400?of preheating temperature,25min of preheating time,1000?of opticalcination temperature,30min of roasting time.The best comprehensive performance of sintered ceramic product can be shown by using the optimum preparation process.The product is suitable to be used in the field of water treatment.?4?The waste beer yeast embedded in acrylic acid?AA?and chitosan?CS?-based hydrogels were prepared into biological adsorbent.The hydrogel material ratio and UV crosslinking preparation were studied,and different factors and effect for a series of samples adsorbing Zn²⁺,Cd²⁺,Pb²⁺were analyzed.The optimum preparation parameters of AA-CS-based hydrogels are as follows:1:30 CS/AA molar ratio,15wt%of N-N'-methylene bis acrylamide?MBA?as crosslinking agent;2wt%of 1173D as photoinitiator and 15min of UV radiation time.The prepared hydrogel showed the highest adsorption rate of those 3kinds of heavy metal ions.After embedding waste beer yeast in the sample of AA-CS-based hydrogels,the sample adsorbing Pb²⁺can be increased by 36.03%.As for the sample of waste beer yeast embedded in AA-CS-based hydrogels,the adsorption of Pb²⁺can reach the highest level when the adsorption temperature was 35?,the pH value was at 6,and CS/AA molar ratio was 1:30.The preparation process of this adsorbent is simple and it is suitable for the treatment of heavy metal ion solutions of medium and low concentration.In this study,several promising resource utilization technologies of waste diatomite and waste yeast from brewery were explored.The whole research aims to turn waste into treasure while reducing the risk of environmental pollution of brewery solid waste,and provide some technical references on the development of circular economy for beer enterprises.