鼠李糖脂对石化废水中多环芳烃（PAHs）和 COD 成分的好氧去除的影响。
Effect of rhamnolipid on the aerobic removal of polyaromatic hydrocarbons (PAHs) and COD components from petrochemical wastewater.
机构信息
Environmental Engineering Department, Engineering Faculty, Dokuz Eylul University, Buca Kaynaklar Campus, 35160 Izmir, Turkey.
出版信息
Bioresour Technol. 2010 Feb;101(3):914-24. doi: 10.1016/j.biortech.2009.09.022. Epub 2009 Sep 26.
The removal efficiencies of 15 PAHs and some COD components (inert, readily degradable, slowly degradable and metabolic products) from a wastewater taken from a petrochemical industry treatment plant (Izmir, Turkey) have been determined using an aerobic completely stirred tank reactor (CSTR). Addition of rhamnolipid surfactant (15 mg l(-1)) increased the removal efficiencies of PAHs and soluble COD from 72% and 90% to 80% and 99%, respectively. The rhamnolipid treatment caused a significant increase of 5- and 6-ring PAH degradation. The soluble COD removal efficiency was 93%, in CSTR reactors with rhamnolipid added. The inert COD removal efficiency was 60% in a CSTR reactor containing rhamnolipid. Batch tests showed that removal arising from the adsorption of the PAHs was low (between 1.88% and 4.84%) while the removal of PAHs from the petrochemical industry wastewater via volatilization varied between 0.69% and 5.92%. Low sorption capacity (K(p)) values for refinery activated sludge (approximately 2.98 l g(-1)) confirmed that bio-sorption was not an important mechanism controlling the fate of PAHs in aerobic CSTR reactors. Models proposed to simulate the PAH removal indicated that 94% of the PAHs were removed via biodegradation.
采用好氧完全搅拌罐式反应器（CSTR），测定了取自土耳其伊兹密尔一家石化厂处理厂的废水的 15 种 PAHs 和一些 COD 成分（惰性、易降解、慢降解和代谢产物）的去除效率。添加鼠李糖脂表面活性剂（15mg/L），使 PAHs 和可溶解 COD 的去除效率从 72%和 90%分别提高到 80%和 99%。鼠李糖脂处理使 5 元和 6 元环 PAH 的降解明显增加。在添加鼠李糖脂的 CSTR 反应器中，可溶解 COD 的去除效率为 93%。含有鼠李糖脂的 CSTR 反应器中，惰性 COD 的去除效率为 60%。间歇试验表明，PAHs 的吸附去除率较低（在 1.88%至 4.84%之间），而通过挥发从石化废水中去除 PAHs 的效率在 0.69%至 5.92%之间变化。炼油厂活性污泥的低吸附容量（K（p）值约为 2.98L/g）证实，生物吸附不是控制好氧 CSTR 反应器中 PAHs 命运的重要机制。提出的模拟 PAH 去除的模型表明，94%的 PAHs 通过生物降解去除。
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