Counterexamples to a conjecture of M. Pellegrini and P. Shumyatsky

Response surface methodology (RMS) modelling to improve n‐dodecane degradation using Debaryomyces hanseniiLAF‐3 in a simulated desalter effluent

“…[ 7 ] Petroleum refineries usually leave a high concentration of oil, in both miscible and immiscible forms, in the effluent. [ 8 ] Hence, different separation technologies have been developed to treat petroleum effluent; nevertheless, petroleum wastewater, after using primary and conventional separation technology, does not meet environmental limits. [ 8 ]…”

“…[ 8 ] Hence, different separation technologies have been developed to treat petroleum effluent; nevertheless, petroleum wastewater, after using primary and conventional separation technology, does not meet environmental limits. [ 8 ]…”

“…[7] Petroleum refineries usually leave a high concentration of oil, in both miscible and immiscible forms, in the effluent. [8] Hence, different separation technologies have been developed to treat petroleum effluent; nevertheless, petroleum wastewater, after using primary and conventional separation technology, does not meet environmental limits. [8] To solve this problem, other separation methods, such as reverse osmosis, membranes, and absorbents, have been investigated, but the formation of secondary pollutants, low separation efficiency, and high energy consumption limit their practical application.…”

“…[8] Hence, different separation technologies have been developed to treat petroleum effluent; nevertheless, petroleum wastewater, after using primary and conventional separation technology, does not meet environmental limits. [8] To solve this problem, other separation methods, such as reverse osmosis, membranes, and absorbents, have been investigated, but the formation of secondary pollutants, low separation efficiency, and high energy consumption limit their practical application. [8] Besides separation, bioremediation is another viable option for removing contaminants from petroleum effluent, which has received a great deal of attention due to its cost effectiveness and its lower energy consumption and labour requirement.…”

“…[8] To solve this problem, other separation methods, such as reverse osmosis, membranes, and absorbents, have been investigated, but the formation of secondary pollutants, low separation efficiency, and high energy consumption limit their practical application. [8] Besides separation, bioremediation is another viable option for removing contaminants from petroleum effluent, which has received a great deal of attention due to its cost effectiveness and its lower energy consumption and labour requirement. [9,10] The use of microbes could be an economically attractive and environmentally friendly treatment for desalter effluent, and the obtained by-products, such as biogas, could make this process more economically viable.…”