Efficiency Research Of Sludge Drying Reed Bed Treatment Residual Sludge

Excess activated sludge disposal problem always has been an important part of the sewage treatment.How to treat the residual sludge more environmental protection,convenience, low energy, more economic and effective became each countries' way out. The sludge drying reed bed emerged at the historic moment,which is used to treat residual sludge.The technology has been studied for quite a long time in foreign countries,however the study of sludge drying reed bed in our country just rise.In this paper, in order to better understand the reed bed running mechanism, then study reed bed.They began to collect the sludge pool surface and the bottom of the sludge and some other indicators,such as the moisture content of sludge, sludge and organic matter, sludge polysaccharides, sludge TP .They analyzed them and concluded that: compared with no ventilation bulrush pool ,the reed grow in ventilation reed pool is the most dense; When examining sludge dehydration nature, it can be concluded that the surface of the sludge moisture content is generally less than that of the bottom sludge , and in terms of three pools,2 # the best dehydration properties about Reed ventilation sludge drying bed is 2 # pool,followed by 3 # pool, 1 # pool dehydration performance is the worst, it proved that reeds and ventilation condition is advantageous to the sludge dewatering; In terms of TP removal effect in the sludge, 2 #pool> 3 #pool > 2 # pool, and the total phosphorus content of the bottom sludge is lower than that of the surface; In terms of the degradation of the organic matter in sludge, 2 #pool> 3 #pool > 1 # pool, the underlying organic matter content of the sludge is below the surface of the sludge; According to the fitting analysis among the moisture content of sludge, the sludge organic matter, sludge polysaccharide, the sludge TP and temperature, it can be seen the five indicators influence each other.Greenhouse gases produced in the course of sludge stabilization process were collected and analyzed in three ponds. The results indicated that the sequence of CH4 daily emissions was 2# >3# >1# and the sequence of CO2 daily emissions was 1#>3#>2#. For each time point of CH4 a day, the emissions were the highest during 14:00 to 16:00. And for each time point of CO2 a day, the emissions of 1# were rising continuously as time went by. What' s more, the highest emissions of 2# and 3# appeared at 8:00 and the lowest appeared at 10:00 or so.Besides, the influence conditions were discussed by fitting analysis of sludge moisture content,organic matter, temperature with CH4 and CO2.