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首页> 外文期刊>Journal of Environmental Science and Health >Enzyme pretreatment of fats, oil and grease from restaurant waste to prolong septic soil treatment system effectiveness
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Enzyme pretreatment of fats, oil and grease from restaurant waste to prolong septic soil treatment system effectiveness

机译：酶预处理餐厅废物中的油脂，油脂以延长化粪池土壤处理系统的有效性

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摘要

When a fast-food restaurant's wastewater containing fats, oil and grease (FOG) is discharged into a collection system, it builds up over time and clogs pipes. Similarly, when such wastewater flows into a septic soil treatment system, it adheres to the surface of inlet pipes, gravel/distribution media and soil, restricting the flow and eventually clogging the septic soil treatment system. In this study, an enzymatic pretreatment system was tested on wastewater from a fast-food restaurant to determine its effectiveness in preventing septic soil treatment system clogging. This system used aeration equipment, baffles and a one-time inoculum that excretes enzymes to reduce the molecular weight and number of double bonds associated with FOG. FOG containing triglycerides having lower molecular weights and fewer double bonds are less sticky. The enzymatic pretreatment system was found to cause these changes as verified by measuring the types of triglycerides (compounds in FOG) using liquid chromatography/mass spectrometry. A unique bench-scale septic soil treatment system (soil trench) was also used. Each contained six soil moisture sensors to enable the determination of moisture saturation trends among the five tested conditions: sanitary wastewater only, a combination of sanitary and kitchen wastewater, enzymatically pretreated sanitary and kitchen wastewater, kitchen wastewater, and enzymatically pretreated kitchen wastewater. For all influent types, a significant amount of FOG and other pollutants were removed, regardless of the initial concentrations. Moisture sensor readings showed differences among the tested conditions, indicating that septic soil treatment system clogging was delayed. Inspection of the influent pipe and gravel at the end of testing verified these differences as did the measurements of volatile solids.
机译：当一家快餐店的废水中所含的油脂，油脂（FOG）排放到收集系统中时，随着时间的推移会堆积并堵塞管道。同样，当这些废水流入化粪池土壤处理系统时，会粘附在进水管，砾石/分配介质和土壤的表面上，从而限制了流量并最终堵塞了化粪池土壤处理系统。在这项研究中，对一家快餐店的废水进行了酶预处理系统的测试，以确定其在防止化粪池土壤处理系统堵塞方面的有效性。该系统使用了曝气设备，挡板和一次性接种物，该接种物会排出酶，以降低分子量和与FOG相关的双键数量。包含具有较低分子量和较少双键的甘油三酸酯的FOG粘性较小。通过使用液相色谱/质谱法测量甘油三酸酯（FOG中的化合物）的类型，证实了酶促预处理系统会导致这些变化。还使用了独特的台式规模化粪池土壤处理系统（土壤沟渠）。每个传感器都包含六个土壤湿度传感器，可以确定五个测试条件中的水分饱和度趋势：仅卫生废水，卫生和厨房废水的组合，经过酶预处理的卫生和厨房废水，厨房废水以及经过酶预处理的厨房废水。对于所有进水类型，无论初始浓度如何，都会去除大量的FOG和其他污染物。湿度传感器的读数显示出测试条件之间的差异，表明化粪池土壤处理系统的堵塞被延迟了。测试结束时检查进水管和砾石，证明了这些差异，挥发性固体的测量也是如此。

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