Example of Printing Ink Wastewater Treatment Project
In view of the characteristic of high organic content,high dissolved solid content and poor biodegradability in printing ink wastewater generated from a ground material factory,the"secondary coagulation sedimentation + DTRO"process is adopted for the wastewater treatment.The process flow,treatment units and equipments,treatment effect and technical economy are introduced in this paper.The stable operation results show that the total removal rates of CODCr,BOD5,SS,NH3-N,DS and TS in printing ink wastewater by this process are 99.77%,98.40%,99.90%,99.91%,99.63%and 99.65%,respectively.The average of BOD5,SS and DS in the effluent after treatment are 20 mg/L,2 mg/L and 68 mg/L,respectively,which are better than the washing water quality standards in"The Reuse of Urban Recycling Water-Water Quality Standard for Industrial Uses"(GB/T 19923-2005).The total cost of electricity and medicine is 26.14 yuan/m3.
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