【摘要】：針對(duì)農(nóng)田退水中NO3--N占比高、碳氮比低的問(wèn)題,提出PS-SFW(Phragmites australis and sulfur combined surface flow constructed wetland,蘆葦碳源-硫耦合表面流人工濕地),對(duì)其強(qiáng)化農(nóng)田退水脫氮的可行性進(jìn)行了研究,并與SFW0(無(wú)蘆葦碳源-硫填充的常規(guī)表面流濕地)進(jìn)行對(duì)比,重點(diǎn)研究了HRT(水力停留時(shí)間)為3、2、4 d條件下S/C(質(zhì)量比,分別為0.32、0.56)對(duì)PS-SFW脫氮效能的影響.結(jié)果表明,HRT為3 d(第29~40天)時(shí),PS-SFW0.32(S/C比為0.32)、PS-SFW0.56(S/C比為0.56)和SFW0的w(NO3--N)分別為55.9%±11.0%、66.0%±10.0%和7.0%±3.0%,w(TN)分別為36.9%±1.0%、40.3%±3.0%和4.5%±2.0%,PS-SFW0.56對(duì)TN和NO3--N去除效能高于PS-SFW0.32,遠(yuǎn)高于SFW0;HRT為4 d時(shí)(第41~81天)及HRT為3 d(第130~149天)時(shí),PS-SFW0.32、PS-SFW0.56、SFW0的w(NO3--N)為66.3%±5.0%、90.5%±4.0%、14.4±4.0%和53.4%±3.0%、62.9%±10.0%、48.5%±5.0%,w(TN)為55.5%±5.0%、75.4%±5.0%、14.4%±3.0%和48.8%±2.0%、57.5%±6.0%、44.1%±5.0%,PS-SFW0.56對(duì)NO3--N和TN的去除效能均優(yōu)于PS-SFW0.32,并且優(yōu)于SFW0.HRT為2 d(第82~129天)時(shí),PS-SFW0.32、PS-SFW0.56、SFW0的w(NO3--N)為47.7%±7.0%、46.6%±6.0%和26.8%±4.0%,w(TN)為37%±6.0%、36.6%±6.0%和24.0%±3.0%,PS-SFW0.32、PS-SFW0.56對(duì)氮的去除效能接近,但仍優(yōu)于SFW0.研究顯示,PS-SFW運(yùn)行條件應(yīng)優(yōu)選S/C為0.56、HRT為4 d.
[Abstract]:Aiming at the problems of high ratio of NO3--N and low ratio of carbon to nitrogen in returning water of farmland, the authors put forward the PS-SFW (Phragmites australis and sulfur combined surface flow constructed wetland, Reed surface flow constructed wetland with carbon source-sulfur coupling), and studied the feasibility of strengthening the denitrification of farmland water for denitrification. Compared with SFW0 (conventional surface flow wetland without Reed carbon source-sulfur filling), the effect of S / C (mass ratio, 0.32 ~ 0.56) on the denitrification efficiency of PS-SFW was studied under the condition of HRT (hydraulic retention time) of 3? 緇撴灉琛ㄦ槑,HRT涓，

本文編號(hào)：2274999