When the reactor operated stably with high strong wastewater under the conditions of HRT 15.87h and volume loading 1.31～1.95kg COD/m2·d,the average removal rates of COD,aniline,colority and NH3-N were 61.6%,59.46%,80% and 55.38% respectively,and their effluent concentration was quite low,creating good conditions for the follow-up treatment of aniline wastewater.
On the condition of applied voltage 30V, electrolysis time 1h, salinity of the electrolyte 800mg/L and initial pH value about 7, the removal efficiency of COD in aniline wastewater can reach 36.53%, and the affected factors were also analysed.
The high salinity aniline-containing wastewater was treated by activated carbon adsorption separation-biological regeneration process. The adsorption separation effect of activated carbon and the affecting factors,principle and stability of biological regeneration were studied.
The treatment of aniline wastewater by internal loop three-phase fluidized bed coupled with Ochrobactrum anthropi which was isolated and domesticated from soil and water polluted by aniline was investigated with prepared fibre-granula as carrier. A variety of degradation conditions including dissolved oxygen(DO),hydro-retention time(HRT)and resistant capacity of concentration load shock were studied to provide information and recommendations for large-scale biological treatment of aniline-containing wastewater.
The effect of concentration, pH, temperature and flow rate on adsorption and desorption was studied in the dynamic adsorption experiment systematically. Based on the research above, the treatment of industrial wastewater containing aniline by JX101 resin was carried out. Its optimum operation conditions are as follows : COD of raw wastewater is 8000mg-L-1~8800mg-L-1, pH=7.0~9.0;
And under the searched optimal conditions, the wastewater containing aniline whose concentration was 20mg/L was treated. The results showed: the water quality completely came up to the emission standard after the treatment with foam flotation, and the removal rates of aniline could reach more than 86.5%.