The Research On The Treatment Of Phosphnomycin Pharmaceutical Wastewater

The pharmaceutical wastewater is noted for its complex contaminants and difficulty to be treated. In this paper, a new treatment process for phosphnomycin pharmaceutical wastewater was put forward based on a lot of experiments and research, named internal-electrolysis and SBR (Sequencing Batch Reactor) process. In this process, the first step was internal-electrolysis that was a pre-treatment to the wastewater. The second step was SBR that was used to deduce organic contaminants further.First, the experiments proved internal-electrolysis was a suitable pre-treatment method. In the experiments, the raw was iron shavings and carbon. The follow factors were discussed respectively in the static state, such as Fe/C, pH, reaction time, temperature. The results showed that the remove-rates of COD_Cr was 40%⁵5% at the best conditions: normal water temperature (30℃),Fe/c is (9⁵):1, reaction time is 1 hour; pH is 4.On the other hand, Fenton reaction was applied in the internal-electrolysis as a deep oxidation treatment, which can enforce the reaction. When the concentration of H₂O₂ was 200mg/L, the remove-rate of COD_Cr was 65%. The dynamic experiments found out the best detain time was 10 min in the reactor. Through this process, BOD₅/COD_Cr of the wastewater was attained 0.40 from 0.25 and it established a solid base for the flowing SBR process.Second step, SBR was adopted to remove COD_Cr In the SBR process, through domestication the sludge were separated from the actived sludge to degrade contamination in the phosphnomycin pharmaceutical wastewater. The experiments were based on the condition of non-limit aerating and the time of filling in was 10 min, and the aerating time to the reactors was 8 hours. After treatment, the COD_Cr of the wastewater was below 190 mg/L. The experiments also showed the sludge in the SBR were good and had a low SVI. The relation of COD_Cr and DO was discussed, which made a primary path to control react process.