Waste cooking oil was used to dry sewage sludge by fry-drying technology. The obtained oil-fried sludge, which contained waste cooking oil and sewage sludge, was converted into biofuel simultaneously via pyrolysis process in a fixed bed. The synergistic effects of sewage sludge and waste cooking oil on the pyrolysis products were also investigated. Comparing to pyrolysis of sludge, pyrolysis of oil-fried sludge can obtain 51.9% higher gas products, where H₂ and CH₄ yields were increased by 37.4% (up to 211 ml/g) and 163% (up to 155 ml/g), respectively. The lower heating value (LHV) of gas product from oil-fried sludge was 41.2% higher than that from sludge. The higher LHV of gaseous products can be beneficial to use for power generation and heating. This indicates that oil-fried sludge shows a potential feedstock can be converted into high valuable biofuel. Nevertheless, the experimental gas and tar yield values of oil-fried sludge were lower than calculated values, indicating that there is an anergy effect of interactions between SS and oil on gas and tar formations. This was because the oily materials layer inhibited the heat and mass transfer in the sludge pyrolysis process, and then hindering the conversion of sludge into gas and tar formation.

废食用油通过油炸干燥技术用于干燥污泥。所获得的包含废食用油和污水污泥的煎炸污泥通过固定床中的热解过程同时转化为生物燃料。还研究了污泥和废食用油对热解产物的协同作用。与污泥的热解相比，油污污泥的热解可得到高51.9％的气体产物，其中H ₂和CH ₄产量分别提高了37.4％（最高211 ml / g）和163％（最高155 ml / g）。油炸污泥产生的气体产品的较低热值（LHV）比污泥产生的气体的较低。气态产物的较高LHV可能有益于发电和加热。这表明油炸的污泥显示出潜在的原料可以转化为高价值的生物燃料。尽管如此，油污泥的实验气和焦油产率值低于计算值，表明SS和油之间的相互作用对气和焦油地层产生了无反应的影响。这是因为油性物质层在污泥热解过程中抑制了热量和质量的传递，从而阻碍了污泥向气体和焦油形成的转化。