Engineering Application of Fenton-ABR Anaerobic-biological Contact Oxidation Combined Process to Treat Chemical Synthesis Pharmaceutical Wastewater
Chemical synthesis pharmaceutical wastewater has the characteristics of high organic matter concentration and complex organic matter components,by studying the characteristics of wastewater,an efficient and stable treatment process is explored.Taking a certain project as an example,the Fenton oxidation-ABR anaerobic-biological contact oxidation meth-od-coagulation sedimentation-activated carbon filtration combined process was introduced in detail.The test results show that the mass concentrations of COD,BOD5,SS and NH3-N in the wastewater are 5200~5400 mg·L-1,1100~1250 mg·L-1,180~200 mg·L-1,50~60 mg·L-1 and the chroma is 80~100 degrees.After 105 d of system debugging and continuous optimization of operation control parameters,the mass concentrations of COD,BOD5,SS,and NH3-N in the effluent should reach below 180 mg·L-1,30 mg·L-1,10 mg·L-1,and 20 mg·L-1 respectively,and the chromaticity should reach below 10 degrees and the main pollutant indicators can reach the Indirect discharge standard of water pollutants for pharma-ceutical industry Chemical synthesis products category(DB41/756-2012)Table 1 Class B standard.For this type of chemically synthesized pharmaceutical wastewater,the Fenton-ABR anaerobic-biological contact oxidation method combined process is technically feasible and has good environmental benefits.