内循环厌氧反应器（Internal Circulation Reactor，简称IC）是在UASB反应器基础开发成功的第三代超高效厌氧反应器，具有占地面积小、高径比大、有机负荷高、出水稳定和耐冲击负荷能力强等特点。 本文采用分散-水解酸化-沉淀作为IC反应器的预处理，对IC反应器处理养殖废水启动和运行进行中等规模的研究。研究表明IC反应器对养殖废水具有比较好的处理效果。 在35±1℃，强制动力内循环量6m3/h~12m3/h，ORP≤-250mv下，采用先稳定COD浓度（2000mg/l）提高容积负荷（0.63KgCOD/（m.d）~2.01KgCOD/（m3.d））后提高进水浓度和提高容积负荷方式启动，经历130天启动完成。启动过程的稳定阶段,进水COD浓度8400mg/l以上，容积负荷在8.4KgCOD/m3?d 以上时，COD去除率在84%以上，产气量高于107 m3/d，内循环量超过236 m3/d，并形成了粒径在0.5mm~2.0mm的强度较大的黑色颗粒污泥。 在35±1℃，强制动力内循环量12m3/h左右，ORP≤-250mv下，分两个阶段对IC反应器运行工况研究。研究表明，承受的最高进水浓度为8962.2mg/L，此时平均容积负荷为11.46kgCOD/（m3.d），COD的平均去除率为82.76%；系统运行期进水COD浓度不得高于9000 mg/L，进水容积负荷不得高于11.50COD/（m3.d）；容积负荷与容积产气率成二次曲线关系，最高容积产气率是4.9 m3/（m3.d）。

The Internal Circulation Reactor(IC reactor)，which was the third generation ultra.high.rate anaerobic reactor developed successfully on the UASB reactor,Has somefeatures that are a small footprint，big high-diameter ratio,high organic load,Drainage stability and Strong resistance impacted capacity of organic load. In this paper, fragmented-Hydrolytic Acidification-sediment are used as a pretreatment of IC reactor . And study the Start and operation of Pilot.scale IC reactor treated Aquaculture wastewater.The research indicates that IC reactor has a relatively good breeding wastewater treatment efficiency. In 35±1℃,the volume of mandatory driving force internal circle of 6m3/h~12m3/h,and ORP ≤-250mv, the startup that is completed in 130 days . The author adopted to stabilize the first concentration of COD (2000mg/L) and increase the volume load (0.63 KgCOD/(m3.d )~ 2.01KgCOD/(m3.d)) and improve concentration and enhance the volume load. In the stable section of the startup,the concentration of COD is above 8400mg/l, the volume load is above8.4KgCOD/m3?d, the rate of removal COD is above84%, the gas production rate is above107 m3/d,the Internal circulation is above 236 m3/d .The black Granular Sludge was formated that the range of grain diameter was from 0.5 millimetre to 2 millimetre,was stronger. In35±1℃,the volume of mandatory driving force internal circle of 12m3/h or so,ORP≤-250mv , The author studied IC reactor run under the two phases . The studies have shown that the system can bear the highest concentration of water 8962.2mg/L. then the average volume load is 11.46kgCOD/(m3 ?d), and the rate of removal COD was 82.76%. the waterlogged concentration of COD of the system shoud not exceed 9000mg/L, the waterlogged volume load of the system shoud not exceed 11.50kgCOD/(m3 ?d). The volume load and the Gas yield of volume assume quadratic curve.The maximum Gas yield of volume was 4.9 m3/(m3 ?d).