The Study Of Fenton Reagent Treating The Production Effluents Of Chitosan And Fish Meal

The treatment of waste chitosan solution by Fenton reagent is studied. The mechanism of affecting factors in the course of degradation is investigated by monofactorial analysis and the optical experimental range is abtained at first . At the end, the optical operating conditions are determined by orthogonal experiment which are as follows: pH(initial)=2.5, pH(end)=10, t(stirring time)=60min, t(static time)=8h, T(temperature)=348K and the dosages of [Fe2+](10gFe/L) and [H2O2](30%) are 15mL, 2mL.The COD removal efficiency under the optical condition is 72.97%.Under the fixed condition at the normal temperature, the degradation efficiency of NaAc with Fenton reagent is studied by UV scanning method. The highest degradation efficiency can amount to 16.39%. In the meanwhile, the kinetic property is obtained that the degradation process can be separated two parts of close first order reaction, which reaction rate constants are 0.0459 # 0.0022.The effects of auxiliary catalysis of Co2, Cd2+, Cu2+ , Mn2+, Zn2, Nj2+in the course of Fenton reagent reaction are also studied. It is demonstrated that at the normal temperature the auxiliary catalytic effect of Co2+ is the best, which can make the COD removal efficiency amount to 74.22%, an increase of 25.99% in contrast to that effect without Co2+.Under the optical experimental conditions at the normal temperature, the influence of UV radiation on the Fenton reaction is studied . It is found that the COD removal efficiency increases as the increase of reaction time with the same mercury vapour lamp. The COD efficiency will increase when the power of mercury vapour lamp increases.The simulative effluent of fish meal is treated by the method of flocculation/Fenton reagent. At the isoelectric point, pH=3.07, the flocculation effectsFentonof iron polysulfate , aluminium polychloride and chitosan chloride are compared . It is illustrated that the optical flocculation reagent is aluminium polychloride and its optical dosage is 0.30g per 50mL effluent.The optical experimental conditions of Fenton reagent degrading the simulative effluent of fish meal are determined by monofactorial and orthogonal experiments at the normal temperature, which is pH(initial)=3, pH(end)=10, t(stirring time)=60min, t(static time)=60min, the dosages of 0.5mol/LFe2+ and H2O2 = 8mL, 3mL. Under the optical conditions the COD removal efficiency amounts to 98.64%.The nomadic AA components are analyzed in the untreated solution and the solutions about which the degradation time are different. It is obtained that fifteen kinds of AA are contained in the untreated solution, namely ALA, GLY, GLU, LEU, VAL, LYS, ILE, THR, MET, PHE, TYR, SER, HIS, ARG, ASP, of which ALA, GLY, GLU, LEU occupy larger percentages. After the degradation with Fenton reagent, seven kinds of AA ,VAL, LYS, ILE, THR, TYR, SER, HIS, ARG disappear from the untreated solution, while a new kind of AA, CYS, is produced largely.