Generalized grey relational analysis on factors influencing reduction of SO42- by SRB
In order to investigate the main factors influencing the reduction of SO42- in sludge degraded by sulfate-reducing bacteria,a generalized grey relational evaluation model was constructed,and the importance of variables was ranked.The re-sults show that under certain conditions,the SO42- reduction rate increases first and then decreases with the rise of temperature and initial pH,and decreases with the rise of oxidation reduction potential.Meanwhile,the comprehensive correlation degrees of temperature,initial pH,and oxidation reduction potential are 0.690,0.755,and 0.537,respectively,and the magnitude of the factors influencing the SO42- reduction rate is in the order of initial pH＞temperature＞oxidation reduction potential.The results can provide theoretical support for controlling the release of hydrogen sulfide during sludge treatment,and can also provide ideas for avoiding or reducing human casualties and property damage caused by hydrogen sulfide production from sludge.
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