不同旱厕滑道材料对粪便黏附特征影响

Influence of different aqua lavatory slide materials on the adhesion characteristics of feces

厕所革命是我国新农村建设的重要内容。卫生旱厕的新建与改建解决了寒旱地区水厕难以推广的问题,但在实际应用中时常碰到粪便黏附于进粪管的尴尬。本研究探讨了无水冲条件下由10种不同材料[聚四氟乙烯(PTFE)、超高分子量聚乙烯(UPE)、聚乙烯(PE)、聚对苯二甲酸乙二醇酯(PET)、丙烯腈-丁二烯-苯乙烯共聚物(ABS)、聚丙烯(PP)、聚碳酸酯(PC)、聚氯乙烯(PVC)、不锈钢板(SS)和水泥板(FS)]制成的滑道在不同角度和粪便类型下对粪便黏附性的影响。结果表明:粪便黏附率会随着滑道倾斜角度、粪便类型及材料种类的不同而发生改变。当滑道角度为75°时,对10种滑道材料进行试验,大部分粪便类型都能较为顺畅通过且无残留,UPE材料抗黏附性最好;在设定滑道角度为50°时,UPE的黏附率最小(17.24%)。综合考虑粪便类型、进粪管设置角度以及现有材料市场价格等因素,UPE是旱厕滑道材料的最佳选择。

The toilet revolution has significantly contributed to new rural construction. To overcome the challenges of building and rebuilding water toilets in cold and dry areas with extremely scarce resources and severe geographical conditions, sanitary dry toilets were constructed in place of water toilets. This study mainly analyzed the adhesion of feces on slides made of ten different materials(PTFE, UPE,PE, PET, ABS, PP, PC, PVC, SS, and FS)under the condition of no water flushing and discussed the fecal adhesion on the slides as a function of the angles and feces type. The results showed that the rate of fecal adhesion varied with angle, fecal type, and slide material type. At a 75° angle, the majority of feces types could pass smoothly without residue, with ultra-high molecular weight polyethylene(UPE)exhibiting the best adhesion resistance. At a 50° angle, the adhesion rate of UPE was the lowest(17.24%), and UPE was confirmed as the most adhesion-resistant slide material. Considering the feces type, setting angle of the fecal inlet pipe, and market price of the existing materials, UPE is suggested as the overall most favorable material tested for constructing a dry toilet slide.