Study on Citric Acid Wastewater Treatment by Biochemical Method
|School||Hunan Agricultural University|
|Keywords||Citric acid wastewater Upflow sludge fluidized bed process Contact oxidation process PH value Volume load|
Citrate is an important organic acids, having many uses in industry, food , cosmetic and other industries . Citric acid production process , however , will produce a large number of high concentration organic wastewater , without going through the proper treatment will result in serious environmental pollution . Therefore , wastewater treatment has become the top priority of China 's citric acid industry . In this paper, starting from the citric acid production processes , briefly currently used citric acid production process and producing pollution link several citric acid wastewater treatment process , to do a brief comparison of the principles and process of various process methods . The experiments for the study of citric acid production wastewater using UASB and contact oxidation main process to carry out experiments , to explore the feasibility of the two processes deal with citric acid wastewater study the the UASB different volume load of pollutant removal , contact oxidation different influent pH and influent pollutant concentration contact oxidation treatment effect . The study aims to find a set of optimal design parameters to handle better removal of . In addition to an engineering example analysis UASB contact oxidation treatment effect of citric acid wastewater . Experimental results show that citric wastewater with the main process of the UASB contact oxidation processing is feasible , UASB reactor is applied to the citric wastewater treatment After 91 days of the experiment has a better pretreatment effect . Experiments UASB reactor design load value the feasible maximum 4-6kg/m3 · d is reached 5.85kg/m3 · d . Contact oxidation process wastewater weakly alkaline degradation effect , little CODcr removal when the influent pH in the range of 4-9 , but water to maintain the pH in the reaction time can be shortened between 7-8 when the influent CODcr 500 ~ 2500mg / l , the reaction 12h ~ 16h stability standards .