Perforance Of Compound Hydrolysis And Acidification-Aerobic MBBR Process For Traditional Chinese Medicine Wastewater Treatment

With the increasingly stringent demands on people’s health,the development of the Chinese medicine industry is also accelerating.More and more traditional Chinese medicine plants have been built,which have brought with them problems in the disposal of Chinese traditional medicine wastewater.,high organic content,unstable water quality,high SS,low biodegradability.This article deals with the treatment of wastewater from a Chinese herbal medicine factory in Shiyan City,Hubei Province.The water treatment process for the first phase of the plant is “level 1 air flotation + hydrolysis acidification + two-stage contact oxidation + advanced treatment(two-stage air flotation + fiber ball filter)”.With the drawbacks of many water treatment structures,cumbersome treatment of water treatment paths,and high energy consumption,a more efficient treatment method was sought to solve this problem.The second phase of the water treatment facilities currently under construction uses “hydrolysis-aerobic” as the The subject’s "enhanced physical pretreatment + double cycle anaerobic + hydrolysis + aerobic" treatment process.In this experiment,the water in the alcohol-settlement workshop was mixed with tap water at a certain proportion as the reactor water.At the later stage of the reactor startup,the removal rate of COD in the hydrolysis reactor was about 60%.The ammonia and nitrogen values increased.This is Since the wastewater contains macromolecules and urea,after the hydrolysis and acidification treatment,the ammonia nitrogen value is increased,and the optimal HRT of the compound hydrolysis reactor is 16h;at the later stage of the reactor startup,the aerobic MBBR reactor is used for COD and The removal rate of ammonia nitrogen is about 80% and 30%,respectively.After adding aerobic particulate filler,the aerobic MBBR system has a better removal effect on COD,ammonia nitrogen,TN and TP,and the removal rate becomes 93% respectively.70%,45%,and 38% of the aerobic granules have good biofouling performance.The cold-coating stage of the fillers lasted for 24 days.The optimal process parameters of the aerobic system are: HRT=30h,DO= 6mg/L,sludge return ratio is 100%.Under the condition of dismantling the compound hydrolysis reactor in the system,the sewage was directly sent to the aerobic MBBR reactor operating under the optimal parameters.It was found that the system’s ability to remove pollutants was reduced,and the removal rate of COD decreased from about 93%.To 87%,the removal rate of ammonia nitrogen from 66% to 58%,indicating the existence of the need for hydrolysis and acidification system.The system has strong impact load capacity.When the influent COD concentration of the system reaches 1150 mg/L,and the influent ammonia nitrogen concentration value reaches 17 mg/L,the COD and ammonia nitrogen values of the effluent can still reach the water contaminants of the traditional Chinese medicine industry.Emission standards(GB21906-2008).The water quality of various locations within the composite hydrolytic acidificationaerobic MBBR reactor was analyzed by UV scanning.It was found that with the gradual progress of the reaction,pollutants in the wastewater gradually decreased,and the original feed water contained a large amount of tryptophan proteins.The mass of tryptophan protein,tyrosine,and fulvic acid were greatly increased after tyrosine and very few fulvic acids were hydrolyzed and acidified,indicating the decomposition of the complex hydrolysis reactor.The effects of macromolecular substances are significant.After passing through the aerobic MBBR reactor,the pollutants in the final effluent were completely degraded,indicating that the aerobic MBBR has a strong ability to degrade pollutants.The high-throughput sequencing was used to analyze the water quality at various locations within the hybrid hydrolyzed acidified-aerobic MBBR reactor.Both in the hydrolyzed and aerobic systems,the species and abundance of the microorganisms on the packing were comparable during the stabilization phase of the system.There are more suspended sludges in the system,which indicates that the biological filler has the role of microbial enrichment.Scanning electron microscope analysis shows that the main reason for this phenomenon is that the structure of the sludge attached to the filler is looser and more porous.This surface morphology is more suitable for the growth and reproduction of microorganisms.The morphology of the sludge on aerobic and aerobic brush packing was compared by scanning electron microscopy.It was found that the structure of the sludge sludge on the particle packing was looser,and the high-throughput sequencing analysis showed that the microorganisms attached to the particle packing were microorganisms.More species rich.This shows that aerobic granular packing has better biocompatibility with brush packing and is more conducive to the growth and reproduction of microorganisms.Through technical analysis and comparison,the new sewage treatment process greatly shortens the sewage treatment path,makes the removal of pollutants in the wastewater more efficient,and the entire treatment process has a greater impact load capacity.