The Chemical Pretreatment Technology Was Studied In Industrial Waste Water With High COD

With the rapid development of petroleum,plastics,composites and coking industries,the industrial wastewater has been significantly increased recently.The industrial wastewater have been attracted attentions by the majority of researchers due to their toxicity,carcinogen and potential genetic mutagen.The removal and degradation of organic pollutants from wastewater have a great impact on aquatic life and terrestrial plant growth and reproduction,as well as human society including food and drinking water safety.therefore,technology development for industrial wastewater with high COD is a great practical significance to the environmental protection.The research object of this article is a chemical plant of m-hydroxy-N,N-diethylaniline production wastewater,this article use the new treatment process with macroporous resin adsorption method and micro electrolysis-Fenton oxidation method combined to treat the industrial wastewater with high COD.At the same time,we analysis and discussion on the effect of wastewater treatment and its influencing factors,it provides the theory basis for the industrial application of new technology.In this paper,the main research results are as follows:1)To investigate the three kinds of commom macroporous adsorption resin for the absorption performance of the wastewater.Comparative to found that the H-103 macroporous adsorption resin is the best,so we have deeply studied the adsorption performance of the H-103 macroporous adsorption resin for the wastewater;Systematically investigates pH value,flow rate,adsorption,desorption agent type and amount of wastewater desorption fluid velocity of the solution for the influence on the macroporous resin adsorption experiment,draw the following conclusion:under the condition of pH=3,H-103 macroporous adsorption resin static adsorption COD removal rate reached more than62%,Dynamic adsorption velocity is 4BV/h,the best adsorption capacity is 7 BV;In the parsing process,it is best to use 70% ethanol solution as the desorption agent,desorption rate is above 97%,it is more appropriate when desorption agent velocity is 2BV/h,resolution can reach above 95%.This way can reache a certain effect of wastewater treatment,at the same time,the adsorption effect of resin can be used to extract the products which loss in the waste water,it aiso can improve the yield of products.2)To study the experiment of iron carbon micro electrolysis-Fenton oxidation combined which can treat waste water.Drawing conclusions from experiments,when the wastewater is 1000 ml,pH = 8,adjusting the optimal pH value to 3,the quality ratio of the iron carbon is 3: 1,iron quantity is 80 g,reaction time is 3.5 h,under this condition,the removal efficiency of COD is higher,the removal efficiency of COD from 16000 mg/L to11300 mg/L,under this condition,the treatment effect is best;At the same time,the dosage of 30% hydrogen peroxide is 6mL/L,with the method of partial dosing,after the compietion of the reaction,pH is 8-9,and PAM is 1.5 mL/L,the COD from the original16000 mg/L to 6500 mg/L,at the activated carbon adsorption processing phase,the amount of activated carbon is 5g,adsorption time is 2h,the COD dropped to 3600 mg/L,the COD removal rate reached more than 77%,which can improve the biochemical to0.32,this method reached a purpose of the pretreatment.