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氯代芳香化合物生物降解性能研究 总被引:3,自引:0,他引:3
本文研究了8种氯代芳香化合物的生物降解性能机理,试验结果表明:污水处理厂年取的未驯化污泥对所选氯代芳香化合物表现出抑制作用,氯苯,邻二氯苯,间二氯苯驯化污泥,除对二氯苯外,其驯化产生微生物均能有效降解或诱导降解所选基质,但对二氯苯仍难于降解,对二氯苯驯化的污泥可有效降解所选全部有机物,且其降解速率常数相应大于其他污泥的耗氧速率常数,在这几种驯化污泥中,对二氯苯驯化污泥对所选氯代芳香化合物的生物降解性能最好。 相似文献
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几种芳香化合物对苯并芘在泥浆反应器中降解的影响 总被引:6,自引:0,他引:6
苯并芘在土壤中难于被生物降解,其降解方式通常以共代谢方式进行.本研究考查了几种多环芳烃及2种单环芳香化合物对苯并芘降解的影响.先把几种芳香化合物投入到供试无污染土壤中进行3d的预培养,然后向土壤中加入苯并芘并使土壤在三角瓶内形成泥浆系统,放在摇床上培养.42d的实验表明,用菲对土壤进行预处Ζ理消除了苯并芘的降解滞后期,并提高了苯并芘的降解率.蒽、芘未能改变苯并芘的降解模式,而苯并蒽则相对抑制了苯并芘的降解.水杨酸和邻苯二甲酸同样消除了苯并芘降解的滞后阶段,且促进了苯并芘的降解,但质量差别未对苯并芘的降解产生影响. 相似文献
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In order to explore the biodegradation behavior of nonylphenolic compounds during wastewater treatment processing, two full-scale wastewater treatment plants were investigated and batch biodegradation experiments were conducted. The biodegradation pathways under the various operational conditions were identified from batch experiments: shortening of ethoxy-chains dominated under the anaerobic condition, whereas oxidizing of the terminal alcoholic group prevailed over the other routes under the aerobic condition. Results showed that the anoxic condition could accelerate the biodegradation rates of nonylphenolic compounds, but had no influence on the biodegradation pathway. The biodegradation rates of nonylphenol (NP) and short-chain nonylphenol polyethoxylates (NPnEOs, n: number of ethoxy units) increased from the anaerobic condition, then the anoxic, finally to the aerobic condition, while those of long-chain NPnEOs and nonylphenoxy carboxylates (NPECs) seemed similar under the various conditions. Under every operational condition, long-chain NPnEOs showed the highest biodegradation activity, followed by NPECs and short-chain NPnEOs, whereas NP showed relatively recalcitrant characteristics especially under the anaerobic condition. In addition, introducing sulfate and nitrate to the anaerobic condition could enhance the biodegradation of NP and short-chain NPnEOs by supplying more positive redox potentials. 相似文献
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InterfacialefectsofsuspendedparticlesonbiodegradationofN(2,4dimethylphenyl)N’methylformamidinehydrochlorideanddibutylphth... 相似文献
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微生物处理生物难降解有机物的进展 总被引:3,自引:0,他引:3
综述了国内外研究较多的几种生物难降解污染物微生物处理技术的进展和这些微生物的分离培养以及用遗传与基因工程技术创建高效菌株的研究。 相似文献
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