In the production process of graphene,the alkali washing tower will generate a large amount of high concentration smoke washing wastewater,with COD greater than 1 000 mg/L and TDS about 14 000 mg/L.After being treated by the"coagulation-air flotation"+disc tube reverse osmosis(DTRO)+mechanical vapor recompression(MVR)process,a portion of the water can be reused for production water,and the remaining wastewater has COD less than 500 mg/L and TDS less than 1 500 mg/L,which meets the local industrial park takeover indicators and is directly discharged into the park sewage pipe network.
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NSTL
万方数据
维普
