Study On The Resource Reuse And Treatment Of Cinnamic Acid Production Wastewater

In this paper, considering the feasibility of cinnamic acid wastewater treatmentfrom two aspects of the recovery of cinnamic acid and cinnamic acid productionwastewater treatment and testing adsorption performance of the resin. The resultsshowed that：NDA-150macroporous resin adsorption performance was significantlybetter than the D-101and AB8macroporous resin, so NDA-150macroporous resinwas used as adsorbent in the research;By the research of NDA-150macroporousresin adsorption,the results indicated that solution treatment capacity is20BV;theadsorption of NDA-150macroporous resin completed in8h and the adsorptionprocess accorded with the first order kinetics and the intra-particle diffusion model;cinnamic acid adsorption capacity of the resin related with the initial massconcentration; the temperature of adsorption was30℃; under the conditions pH=3to4, cinnamic acid adsorption best; dynamic adsorption flow rate18BV/h.Basing on the systematic adsorption and desorption study of NDA-150macroporous resin processing cinnamic acid solution, we researched the effect of theadsorption of cinnamic acid production wastewater on NDA-150macroporous resinand the study showed that, cinnamic acid production wastewater was slightly lowerthan the solution of cinnamic acid of NDA-150macroporous resin adsorption ofcinnamic acid.Basing on the reaserch of cinnamic acid solution and wastewater， theparameters of NDA-150macroporous resin adsorption of cinnamic acid wasdetermined.The results showed that:Adsorption: flow rate6BV/h; the temperature was30℃; pH was3to4；thepenetration point of the volume was16BV；cinnamic acid concentration of effluentwas about5mg/L;Desorption: temperature was about30℃; flow rate was6BV/h; pH wasalkaline; the frequency of regeneration was5times;Under optimum operating condition, the recovery of cinnamic acid was about95%and the purity of cinnamic acid was about75%from the desorption liquid distillation.The stsbility experimental results show that the adsorption and desorptionof NDA-150macroporous resin were stable and COD was about800mg/L ofcinnamic acid wastewater effluent. The final effluent COD maintained at50mg/L orso under Fenton oxidation optimal parameters of pH3~4, the optimum dosageferrous sulfate wastewater1.5kg per ton,30%hydrogen peroxide10L per ton and thebest reaction time3h (first stirring1h,2h after standing water).