CAJ | 학술논문

研究了几种生化难降解有机物在预臭氧化过程可生化性（BOD5/CODCr，即5天生化需氧量与化学耗氧量的比值）的变化情况，并提出了一个氧化度（即有机物的氧化程度，定义为：（4TOC-CODCr）/4TOC，其中 TOC为总有机碳）的概念。结果表明，在预臭氧化硝基苯、邻苯二甲酸二甲酯和磺基水杨酸模拟水样过程中，水样的氧化度和可生化性均有不同程度的提升，而且两者存在一定的正相关性。当体系氧化度大于0.65时，水样的BOD5/CODCr一般均在0.2以上，可直接进行生化处理。对某酸性化工废水进行了预臭氧化处理（Ti(Ⅳ)/H2O2/O3），120 min后CODCr和TOC的去除率分别达到了66.09%和34.09%，此时水样的氧化度从原来的0.346升至0.664， BOD5/CODCr值从原来的0.05升至0.332，显示了较好的正相关性。利用易测的氧化度来预判水样的可生化性，这对推广预臭氧化技术在实际难降解废水处理中的应用具有重要的实际意义。
연구료궤충생화난강해유궤물재예취양화과정가생화성（BOD5/CODCr，즉5천생화수양량여화학모양량적비치）적변화정황，병제출료일개양화도（즉유궤물적양화정도，정의위：（4TOC-CODCr）/4TOC，기중 TOC위총유궤탄）적개념。결과표명，재예취양화초기분、린분이갑산이갑지화광기수양산모의수양과정중，수양적양화도화가생화성균유불동정도적제승，이차량자존재일정적정상관성。당체계양화도대우0.65시，수양적BOD5/CODCr일반균재0.2이상，가직접진행생화처리。대모산성화공폐수진행료예취양화처리（Ti(Ⅳ)/H2O2/O3），120 min후CODCr화TOC적거제솔분별체도료66.09%화34.09%，차시수양적양화도종원래적0.346승지0.664， BOD5/CODCr치종원래적0.05승지0.332，현시료교호적정상관성。이용역측적양화도래예판수양적가생화성，저대추엄예취양화기술재실제난강해폐수처리중적응용구유중요적실제의의。
After studying changes of biodegradability (BOD5/CODCr, the ratio of biochemical oxygen demand after 5 days to chemical oxygen demand) of several refractory organic compounds before and after pre-ozonation a oxidative degree conception of organic compound, defined as (4TOC-CODCr)/4TOC, in which TOC refers to total organic carbon, has been put forward. The results show that after pre-ozonation the oxidative degrees and biodegradability of nitrobenzene, 1,2-dimethyl phthalate and sulfosalicylic acid solutions all increases, and that there is a positive correlation between the sample’s oxidative degree and their biodegradability. The BOD5/CODCr values of the samples can be more than 0.2 when its oxidative degrees are greater than 0.65, showing that these samples can be directly treated by biological treatment. The results of pre-treating acidic chemical wastewater by an advanced ozone-based oxidative process (Ti(Ⅳ)/H2O2/O3) show that the removal rates of CODCr and TOC were 66.09%and 34.09%after 120 min, respectively, and that the oxidative degree and BOD5/CODCr value of the acidic chemical wastewater increased from initial 0.346 and 0.05 to 0.664 and 0.332, respectively. There also is a good positive correlation between the oxidative degree and the BOD5/CODCr value. The results mentioned above indicate that the oxidative degree value can probably be used to evaluate the biodegradability of wastewater. Due to the determination of the oxidative degree is simple and fast, it will be of significance for common application of ozonation technology in pre-treatment of refractory wastewater.