Research and Application of SBR Process for Treatment of Refractory Organics (I)


Abstract : Based on the analysis of the general characteristics of SBR process, the application status of SBR process in the treatment of refractory organics, paper printing and dyeing and other industrial wastewater, and the development of SBR process in basic researches such as mathematical model, sludge bulking mechanism and microbial characteristics were introduced. , And discussed the process control and control research of online control, process design and startup strategy.

Key words : SBR; refractory organics; research and application

1 Overview

At present, the object of SBR treatment of refractory organics covers almost all objects treated by other biological methods (see Table 1). Thomas F. Hess et al. [1] used SBR to treat wastewater containing 2,4-dinitrophenol (DNP) and studied the addition of different concentrations of glucose to improve the treatment of DNP. The additional carbon source can prolong the biological generation time, increase the concentration of DNP degrading bacteria in the sludge, and further improve the degradation effect of DNP. Basu SK [2] used SBR to treat self-contained wastewater containing 30 mg/L a-chlorophenol (2-CP), and studied the effect of glucose, phenol and other supplementary substrates on the treatment effect, and compared glucose and phenol. It is the treatment effect under the three conditions of dissolved organic carbon and no added substrate. The specific degradation rate of 2-CP can be increased from 3.96 mg2-CP/(gVSS·h) with no added substrate to 5.15, 8.19 mg 2-CP/(gVSS·h) with 20 g/L glucose and phenol. When the concentration of glucose and phenol increased to 40 mg/L, the specific degradation rate of 2-CP increased to 7.9 4 and 11.54 mg2-CP/(gVSS·h), respectively, and the addition of phenol was more degraded than 2-GP by glucose. The good promotion effect indicates that the type, nature, and concentration of the added exogenous substrate are important factors affecting the biodegradation rate of 2-CP.

Normal align=center> Table 1 Operating Modes for SBR-Responsible Refractory Organics

Normal > handle object

Normal > operating mode

Normal > processing result

Normal > Dinitrophenol containing wastewater

Normal > 48h=0.8h+44.8h+1.8h+0.6h+0

Normal >

Normal > Aniline organic wastewater

Normal > 24h=1h+5h+1h+1h+16h

Normal > Influent COD150 ~ 500mg/L, aniline 800 ~ 1800mg/L . Removal rate of 99%

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