Abstract：In this paper, the influence of flow on the bed characteristics is researched, variation of the production load of the fluidized bed anaerobic reactor, the influence of the flow on the bed expansion rate, gas production of each component, the relative content of the gas produced, the size of granular sludge and the influence of the gas produced on the bed expansion rate are obtained. The key pilot scale equipments are selected on the basis of calculation and the process flow is designed. Research shows that: actual minimum fluidization flow, 3.73～4.16mL·min-1, is in good consistency with minimum fluidization flow, 3.864mL·min-1, in theory. Within a certain range of the flow, large flow is help to production load. When the flow is 11.2mL·min-1, the maximum production load is 4.66mg·L-1·min-1. Improving the flow properly is help to gas production of each component, but influence of flow on the relative content of the gas produced is not significant, the content of CH4 is almost 7 times than CO2. The bed expansion rate in cold model test is obviously higher than it in hot model test due to the gas produced. Within a certain range of the experiments, the difference value of bed expansion rate in the tests becomes larger when improving the flow. Improving the flow properly is help to the growth of the granular sludge.
Keywords：Granular sludge; Flow; Reactor; Technology design
