A part of organic matter can be relieved through leachate recirculation, but ammonia can be cumulated. Organic matter load of leachate recirculation was heavy, there was no evidence effect body of landfills settlement.

淋率液回灌对有机物负荷有一定的去除作用，对垃圾体沉降没有明显影响。

The features of flow field were investigated under various flow rate Q and incoming flow height Hin. The recirculation length and the length at which the flow reaches to uniform flow were measured.

考察了流量和进水口高度变化时的流场特征、回流区长度和达到均匀流速的长度变化情况。

The experimental data indicated that the perfusion culture, was excelled than that of the recirculation culture, and that the recirculation culture which had the characteristics of both perfusion and batch cultures was excelled than that of the batch culture.

表明灌流培养优于再循环培养；而再循环培养兼容批培养及灌流培养的特点，又优于批培养。

In the early term of recirculation, removal effect can reach stabilization in short term, and the removal ratio of ammonia nitrogen stabilizes over 96%.

回灌初期，去除效果在很短的时间内达到稳定，去除率稳定在96％以上。

While the recirculation ratio were 3, 5 and 7, removal ratios of SS were 90.6%, 86.9% and 76.3%. The operation performance of recirculating filter varied periodically in response to backwash, and the periods was 24h.

当负荷在3～8kgCOD／m~3·d之间时，出水COD浓度在40～170mg／L之间变化，可通过调节回流比的方法，克服COD容积负荷对循环滤池运行效能的影响；高水力负荷下，SS去除效果较差，当回流比从3、5增大到7时，SS去除率从90.6％、86.9％降到76.3％；滤池的运行效能随反冲洗的进行呈周期性变化，运行周期为24h。