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With the rapid development of China's economic construction, everywhere, to strengthen the construction of urban drainage and sewage treatment facilities, and more urban sewage treatment plant is put into operation, will inevitably produce a large number of high moisture content of the sludge. These untreated sludge of any stacked and emissions to the environment caused by pollution, disposal costs usually associated with sewage treatment costs. Thus, how are large, complex composition of the sludge, scientific processing, so that it and harmless resources, which has become one of the topics of our country and the world environmental community is deeply concerned. Muddy for of Xi'an Sewage Treatment Plant sludge characteristics of its two-phase anaerobic digestion process, the stable operation of data with single-phase anaerobic digestion treatment results were compared, and a theoretical analysis. The results showed that the treatment of the two-phase anaerobic reactor system: sludge in short residence time (12.35d, which acidogenic phase 1.25d, methanogenic phase 11.1d), higher organic loading (about 2.65kgVS / m 3 · d) stable operation system VS removal rate of 38.87% COD removal efficiency of 43.45%, pH 7.5, the gas production rate of 6.33L / L · d, units VS gas production rate of 3.00 L / g. By comparison, the residence time of the two-phase anaerobic digestion system is half of the ordinary single-phase anaerobic treatment system, while the the sludge organic load to 2 times the ordinary anaerobic reactor pool (ordinary anaerobic reactor pool residence time of 15.07 ~ 25d , the organic load of 0.6 ~ 1.5kgVS / m 3 · d). Same hydraulic retention time, the removal rate of the two-phase system, the treatment effect; VFA content of the mud, high stability, shock load capability; gas production well, only the production of methane gas phase The yield was 1.17 times the single-phase, up to 72.18% of the methane content of the gas produced. Thermal analysis shows that, in addition to years of extreme temperatures, usually two-phase anaerobic digestion to meet their own digestion treatment outside there is a surplus of heat consumption. At the same time, on an experimental basis, the papers of the two-phase anaerobic digestion Eckenfelder kinetic analysis derived acidogenic phase factor: K 2 = 0.0178 g -1 · d < sup> -1 , S n = 22.2022g / L, Y = 4.6425gVSS/gCOD, K d = 0.902d -1 ; methanogenic phase coefficient: K 2 = 0.0058g -1 · d -1 the S n = 17.5345g / L, Y = 4.0096gVSS/COD, K d = 0.2181d -1 .
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