人工濕地工藝計算

人工濕地,,,,,,,,,,,,

一、地表流人工蘆葦濕地處理系統(tǒng),,,,,,,,,,,,

1、濕地面積設(shè)計計算,,,,,,,,,,,,

,,,處理水量Q=,2000,m3/d,,,,,,,

,,,原水BOD5＝,40,mg/l,,,,,,,

,,,出水BOD5＝,20,mg/l,,,,,,,

,,,,,,,,0.058268908,,,,

假定：,,,,,,,,,,,,

,,,污水中不可沉淀去除的BOD5份額α＝,0.53,,,,,,,,

,,,水溫為20℃時的生化反應(yīng)速率常數(shù)K20＝,0.0057,d-1,,,,,,,

,,,泩性生物比表面積Av=,18.85,m2/m3,,,,,,,

,,,濕地床水深H＝,10,cm,,,,,,,

,,,冬季H＝,30,cm,,,,,,,

,,,系統(tǒng)孔隙度n=,0.75,,,,,,,,

(1）水力停留時間t,,,,,,,,,,,,

水溫為,20,℃時,t=,0.114184683,(d),,,,,,,

水溫為,10,℃時,t=,0.296165661,(d),,,,,,,

水溫為,5,℃時,t=,0.476977758,(d),,,,,,,

(2)占地面積A,,,,,,,,,,,,

水溫為,20,"℃時,水深",10,cm,A=,2283.69366,(m2),,,,,

水溫為,10,"℃時,水深",20,cm,A=,2961.656606,(m2),L,B,,,

水溫為,5,"℃時,水深",30,cm,A=,3179.851721,(m2),80,50,4000,,

（3）布水管,,,,,,,,,,,,

,,,主管流速V＝,0.5,m/s,,,,,,,

,,,主管數(shù)量n=,2,個,,,,,,,

,,,主管管徑D1=,171.7209562,mm,,,,,,,

,,,實際選取D1＝,200,mm,,,,,,,

,,,校核實際流速V1＝,0.368601085,m/s,,>0.3m/s,,,,,

,,,支管數(shù)量n2=,384,,,,,,,,

,,,,L,H,V,,,,,,

,,配水渠進水孔,,500,300,0.154320988,,,,,,

,,,單根穿孔管長度=,4000,mm,,,,,,,

,,,穿孔管數(shù)量n=,384,根,,,,,,,

,,,穿孔管合計長度L＝,1536000,mm,,,,,,,

,,,穿孔間距=,200,mm,,,,,,,

,,,穿孔數(shù)量＝,7680,個,,,,,,,

,,穿孔孔徑＝,,5,mm,,,,,,,

,,穿孔管流速V=,,0.153583785,m/s,,,,,,,

,,,,,,,,,,,,,

(4）集水管,,,,,,,,,,,,

,,,主管流速V＝,0.5,m/s,,,,,,,

,,,主管數(shù)量n=,4,個,,,,,,,

,,,主管管徑D1=,121.4250526,mm,,,,,,,

,,,實際選取D1＝,150,mm,,,,,,,

,,,校核實際流速V1＝,0.327645409,m/s,,>0.3m/s,,,,,

,,,單根穿孔管長度=,480000,mm,,,,,,,

,,,穿孔管數(shù)量n=,8,根,,,,,,,

,,,穿孔管合計長度L＝,3840000,mm,,,,,,,

,,,穿孔間距=,500,mm,,,,,,,

,,,穿孔數(shù)量＝,7680,個,,,,,,,

,,穿孔孔徑＝,,10,mm,,,,,,,

,,穿孔管流速V=,,0.038395946,m/s,,,,,23,12,276

,,,,,,,,,,12,48,576

,,,,,,,,,,1.