Liu Gang-Jin, Liu Yi, Wang Zhi-Yong, Lei Yun-Hui, Chen Zi-Ai, Deng Liang-Wei
Biogas Institute of Ministry of Agriculture, Chengdu 610041, PR China.
Biogas Institute of Ministry of Agriculture, Chengdu 610041, PR China.
Waste Manag. 2015 Apr;38:449-54. doi: 10.1016/j.wasman.2014.12.015. Epub 2015 Jan 20.
An efficient way to avoid the pollution of swine wastewater is the application of dry anaerobic digestion, which needs rheological parameter for stirring and pipe designing. The rheological properties of this kind of sludge have been studied for many decades, yet their effects only solid concentration has been investigated widely. In this paper, the influences of temperature, organic and time-dependency on the efficiency of anaerobic digested swine manure were studied. The viscosity decreased with temperature arranged from 10 to 60 °C which caused increase in protein from 7.18 to 8.49 g/kg. 60 °C can make the digested swine manure with TS from 16.6% to 21.5% reach to the same rheology state. The added peptone decreased the viscosity because of its function of water-reducing admixture and air entraining mixture. Time-dependent experiment showed the decrease of shear stress over time. The first and the second yield stress of dry anaerobic digested swine manure were evaluated through time-dependent model.
避免猪废水污染的一种有效方法是采用干式厌氧消化，这需要流变参数来进行搅拌和管道设计。几十年来，人们一直在研究这种污泥的流变特性，但仅对其固体浓度的影响进行了广泛研究。本文研究了温度、有机物和时间依赖性对厌氧消化猪粪效率的影响。随着温度从10℃升至60℃，粘度降低，蛋白质含量从7.18克/千克增至8.49克/千克。60℃可使总固体含量为16.6%至21.5%的消化猪粪达到相同的流变状态。添加的蛋白胨因其减水剂和引气剂的功能而降低了粘度。时间依赖性实验表明，剪切应力随时间降低。通过时间依赖性模型评估了干式厌氧消化猪粪的第一和第二屈服应力。
