The Study On The Advanced Treatment Of Acrylic Fiber Wastewater

There are a lot of complex components in the acrylic fiber wastewater, the effluent after biochemical treatment is still difficult to achieve the desired standard. In order to solve the above problems, the three advanced processes were used in this article to treat the biochemical effluent of acrylic fiber wastewater, they are Fenton advanced oxidation process, Enhanced Coagulation process and Fenton Oxidation-Coagulation process. It also investigated the influences of different experimental conditions on the degradation of pollutants.Firstly, by single-factor test, the factors of Fenton advanced oxidation process treating the biochemical effluent of acrylic fiber wastewater such as the reaction time, the dosage of FeSO4·7H2O and H2O2, initial pH were investigated. Secondly, the optimal experimental conditions were determined:the dosage of H2O2was0.16mol/L, the dosage of FeSO4·7H2O was7.20mmol/L, pH was3, reaction time was90min, in the conditions CODCr reduced from308mg/L to103mg/L, the removal rate reached66.5%. The fluorescence analysis showed that the varieties and amount of the polluted material after the advanced treatment of acrylic fiber wastewater significant decreased.In the comparative test, Enhanced Coagulation process using three kinds of coagulating agents (Ferrate, PFS-composite Ferrate Chemicals, inorganic oxide polymer silicon iron) was used to treat acrylic fiber wastewater effluent, which determined that inorganic oxide polymer silicon iron coagulating agent was the best excellent treatment agent. The influences of initial pH value, alkalinity, the dosage of oxidation and coagulant, as well as the PAM dosage and any other reaction factors were investigated. The results showed that:when the initial pH was9, the dosage of CaO was0.5g/L, the dosage of oxidation and coagulant was6mL/L, the dosage of PAM was6mg/L, over thirty percent removal rate of CODCr achieved.in order to reduce the cost, Fenton oxidation-coagulation process to treat the acrylic fiber wastewater effluent was studied. The results showed that the intial pH of Stages of oxidation was2, the dosage of10%H2O2was0.08mol/L, the dosage of FeSO4·7H2O was3.6mmol/L, reaction time was30min, pH of coagulation stagewas7, the dosage of polyacrylamide (PAM) was4mg/L. After the treatment, the effluent CODCr of acrylic fiber wastewater could reach130mg/L, the best removal rate of CODCr was over55%, and the coloration was lower. In a word, the method can get an effective advanced treatment of acrylic fiber wastewater.