Study On Treatment Of Berberine Hydrochloride Wastewater By Microelectrolysis-Hydrolysis Acidification-DMBR

Berberine hydrochloride has a strong antibacterial effect and is widely used inmedicine and aquaculture.In the process of chemical synthesis of berberine hydrochloride,a typical antibiotic wastewater--berberine hydrochloride wastewater is produced.It hasstrong toxicity and is difficult to biochemical.If a large amount of sewage is dischargedinto the environment,it will affect the growth and reproduction of microorganisms in water bodies and soils,thereby disrupting ecological balance,and ultimately endangering human health.Therefore,how to effectively treat the berberine hydrochloride wastewater isurgent.As a pretreatment method with good treatment effect,convenient operation and low cost,iron-carbon micro-electrolysis is widely used in water treatment technology.Thehydrolysis acidification process has the characteristics of strong adaptability,highmetabolic intensity,and can greatly improve the biodegradability of wastewater.It is often used in wastewater treatment technology.Dynamic membrane bioreactor?DMBR?hasbecome a hot technology in the field of wastewater treatment due to the advantages of good effluent water quality,small size,and low cost.In this paper,iron-carbonmicro-electrolysis-hydrolysis acidification-DMBR was used to treat berberinehydrochloride wastewater.The main research is the removal of COD,ammonia nitrogen,UV₂₅₄54 and berberine hydrochloride and membrane pollution in the berberine hydrochloride wastewater.It is hoped to seek a high efficiency and low cost wastewater treatment method,and provide theoretical basis for antibiotic wastewater treatment field.In this study,artificially prepared berberine hydrochloride wastewater was used.The wastewater was degraded by hydrolysis acidification-DMBR process.Firstly,themaximum load concentration of berberine hydrochloride was investigated.Then compare the effects of hydraulic retention time?HRT?,dissolved oxygen?DO?,and sludge reflux ratio?R?on the removal of COD,ammonia nitrogen,UV₂₅₄54 and berberine hydrochloride in wastewater.The results showed that the maximum load of berberine hydrochloride in the hydrolysis acidification-DMBR reactor was 200mg/L.The optimum process parameters are:HRT=24h,DO=2.8³.2mg/L,R=200%.Using iron-carbon micro-electrolysis as a pretreatment method for wastewater,the effects of four factors including reaction time,solid-liquid ratio,initial pH,and aeration amount on the treatment effect of berberine hydrochloride were investigated.Based on the results of the single factor test,the conditions were optimized by the central combineddesign method?CCD?,and the best process conditions were selected under the premise of ensuring the fitting degree of regression model and experimental economy.The resultsshow that the four major factors affecting the rate of berberine hydrochloride removal from large to small are:aeration amount,solid-liquid ratio,reaction time,initial pH.The bestexperimental conditions are:reaction time of 3.52h,solid-liquid ratio of 0.489,initial pH of3.03,and aeration amount of 3.45L/min.At this time,the response surface modelverification value of the berberine hydrochloride removal rate was 84.92%,and the actual average removal rate was 83.66%with only a deviation of 1.26%.The model has a high reliability.By coupling the iron-carbon microelectrolysis process with the hydrolyticacidification-dmbr process.Under the best working conditions,the effect of couplingprocess on pollutant removal and the retardation effect of iron-carbon micro-electrolysis on membrane pollution were studied.The results showed that the total average COD,ammonia nitrogen,UV₂₅₄54 and berberine hydrochloride removal rates of the reactor were 98.56%,98.94%,97.43%,and 99.70%.By measuring the changes of transmembrane differentialpressure,sludge properties and EPS in the hydrolysis acidification-DMBR process and the coupled process.It can be concluded that the reactor pretreated by iron-carbonmicro-electrolysis has a slower increase in transmembrane pressure difference,slightly faster sludge concentration but better sedimentation.The growth rates of protein,polysaccharides and total EPS were slightly lower.According to Pearson analysis of the transmembrane pressure rise rate,they all have a strong correlation,and the correlationfrom strong to weak is:polysaccharide,protein,sludge concentration.FTIR analysis of the filter cake layer on the DMBR shows that the protein and polysaccharide concentrations on the filter cake layer are slightly higher in the reactor without pretreatment.Therefore,theaddition of iron-carbon micro-electrolysis as a pretreatment method can effectively reduce the protein and polysaccharide in the reactor and delay membrane fouling.Figure[23]Table[11]Reference[98]...