freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

某城鎮(zhèn)污水處理廠初步設(shè)計畢業(yè)設(shè)計(參考版)

2025-06-25 22:00本頁面
  

【正文】 Denitrification is found, should reduce air, increasing the backflow or mud。 Such as water load should be reduced into water or step back flow。 When the aeration time is too long, high nitrification occurred in the pool, the nitrate concentration is high, in the second pond, prone to denitrification, produce nitrogen gas, sludge floating。 The sludge age slightly long, sludge aging, also easy to produce foam. With surface spray water or remove foam deforming agent, deforming agent monly used engine oil, kerosene, silicone oil, turnover of ~ mg/L. By increasing the sludge concentration in aeration or reduced air, also can effectively control the bubble. When the wastewater contains surface active material is large, easily removed by foam separation process or other method in advance. Also can consider adding a set of oil removal device. But the most important is the better water management, reduce the high oilbearing wastewater and other toxic wastewater into. Sludge upfloating problem When the oil content in waste water is too large, qualitative light, the whole System in the process of operation can39。 Chlorine bleaching powder and liquid (% ~ % in dry sludge dosing), inhibit filamentous fungi reproduction, bined with water sludge bulking control. Bubble problem Due to water with a large number of oil, processing System can39。 Can be adjusted by adding the nitrogen fertilizer, phosphate fertilizer, mixture of nutrient balance (BOD5: N: P = 100:5)。 Non filamentous bacteria mainly in wastewater sludge bulking sludge load at high temperature is low. Microbial load is high, the bacteria absorb a large amount of nutrients, because of the low temperature, metabolic speed is slow, product storage on a large amount of high viscosity polysaccharide substances, the adhered on the surface of the activated sludge in the water increase greatly, SVI value is very high, the formation of sludge bulking. Aiming at the cause of sludge bulking, can adopt different countermeasures: caused by a lack of oxygen, high water temperature, can increase air or cut into the water to lighten the load, or decrease the MLSS (control sludge return flow), reduce oxygen demand。 at the same time, nitrate and nitrite, ammonia was oxidized to at this point, the mixture in aerobic condition. By aeration zone in the downstream of the aerator, water turbulence state into a state of advection, maintained at a minimum velocity of flow, ensure that activated sludge in a suspended state ( m/s) average velocity. Microbial oxidation process consumes dissolved oxygen in water, until the value to zero in the DO, mixture in hypoxia state. 3. The CD method and application widely in the largespan tunnel, the CRD construction method in this System, BOD degradation is a continuous process, nitrification and denitrification occurred in the same pool. Because of the limitation of structure of the oxidation ditch can be effective for BOD, but phosphorus removal denitrification ability is limited. Carrousel Moseley oxidation ditch the influence factors of biological nitrogen removal Influence factors of phosphorus removal from Carrousel Moseley oxidation ditch is primarily a sludge age, nitrate concentration and substrate concentration. Research shows that when the total sludge age of 8 ~ 10 d, the lion39。[14],化學(xué)工業(yè)出版社,2003[12]().北京,中國建筑工業(yè)出版社,2000[10].《給水排水》,2000[8],化學(xué)工業(yè)出版社,2002.[7][6][5]中國市政工程西南設(shè)計研究院主編::中國建筑工業(yè)出版社,20012002 [3]《室外排水設(shè)計規(guī)范》GB50014-2006感謝所有幫助過我的人!他們在日常的學(xué)習(xí)生活中給予了我很多幫助,幫我度過了一個個難關(guān),點(diǎn)點(diǎn)滴滴見真情,他們是我的好同學(xué)好朋友。我衷心祝愿給排水教研室的每一位老師,身體健康,事業(yè)有成,桃李滿天下!尤其對各門專業(yè)基礎(chǔ)課及專業(yè)課有了更深的認(rèn)識,為我以后的學(xué)習(xí)和幫助有了堅強(qiáng)的基礎(chǔ),也為我更好的從事本專業(yè)工作樹立了信心。其次,感謝三年來給予我教育的老師們。你給我們留下了深刻的印象;在給予我設(shè)計上的指導(dǎo)時,老師科學(xué)的思考方法和嚴(yán)謹(jǐn)?shù)闹螌W(xué)態(tài)度使我受益匪淺、終生難忘。謝 辭在我三個多月的畢業(yè)設(shè)計生活中,老師和同學(xué)們給予了我很多的幫助,在此我向他們表示衷心的感謝!根據(jù)設(shè)計資料,水量,以及泰安市的經(jīng)濟(jì)狀況,選用A2/O工藝較為適合。但從總體來看其運(yùn)行費(fèi)用低,勿需投藥;總水力停留時間少于其它同類工藝;在厭氧(缺氧)、好氧交替A2/O工藝對BODCOD、SS、氮、磷都有很高的去除效果。 在主要處理構(gòu)筑物的計算階段,本設(shè)計主要對污水及污泥工藝中的主要夠處理構(gòu)筑物進(jìn)行了設(shè)計計算。設(shè)計的主要內(nèi)容包括該處理廠的污水及污泥處理工藝的比選確定,主要處理構(gòu)筑物的設(shè)計計算兩大部分。不過這對我而言也是一筆寶貴的財富,使我有機(jī)會綜合運(yùn)用大學(xué)三年所學(xué)的專業(yè)知識,全面了解工程設(shè)計的一般步驟和常用方法,更使我深刻的體會到了作為一名工程技術(shù)人員所應(yīng)有的科學(xué)、嚴(yán)謹(jǐn)、認(rèn)真的精神。 表43二沉池至污泥回流泵房鹽城水頭損失計算表管 道名 稱流 量Q(m3/s)管徑 DN(mm)流速(m/s)坡 降1000i管長m水頭損失m二 沉 池排 泥 管60020,二沉池至污泥泵房的水頭損失為:+=,污泥泵房的睡眠標(biāo)高為:=41 結(jié) 論經(jīng)過緊張的設(shè)計計算,本次畢業(yè)設(shè)計終于完成。1. 各處理構(gòu)筑物間連接管渠的長度:表42各處理構(gòu)筑物間連接管渠的長度管渠名稱長度(m)管渠名稱長度(m)出廠管入河至接觸池90初沉池至沉砂池30接觸池至二沉池20沉砂池至細(xì)格柵20二沉池與反應(yīng)池60細(xì)格柵至提升泵房15反應(yīng)池至初沉池35提升泵房至中格柵15河流洪水位標(biāo)高:113m跌水位:跌水井水位:出水廠管總損失:90=接觸池出水管總損失:20=接觸池出水口的損失:合計:接觸池水位:接觸池進(jìn)口損失;合計:混合池水位:混合池進(jìn)水口損失:混合池入水管總損失:60=二次沉淀池出水口損失:合計:二次沉淀池出水總渠起端水位與集水槽出水口水位相同,二次沉淀池集水槽堰上水頭:自由跌水:合計:二次沉淀池水位:二次沉淀池進(jìn)水頭部的損失:二次沉淀池進(jìn)水管總損失:10=集泥配水井內(nèi)出口損失:合計:集泥配水井內(nèi)井水位:集泥配水井進(jìn)口損失:總損失:25=合計:曝氣池積水槽水位:曝氣池集水槽堰上水頭:自由跌水:合計:曝氣池水位:曝氣池進(jìn)水口損失:合計:曝氣池配水口水位:配水進(jìn)出水損失:合計:配水井井內(nèi)水位:配水井進(jìn)口損失:輻流式初沉池出水管損失:30=輻流式初沉池配水口水位:配水井進(jìn)口損失:沉砂池出水總管損失:20=平流沉砂池出水總渠起端與集水槽出水口水位相同,其水位為:沉砂池出水堰的堰上水頭:自由跌水:合計:沉砂池水位:細(xì)格柵過柵水頭損失:細(xì)格柵前水位:中格柵柵后的水面標(biāo)高中格柵前城市污水主干管的水面標(biāo)高為 ,則中格柵柵后的水面標(biāo)高為:?=,中格柵柵后水深為 ,則污水提升泵所需靜揚(yáng)程為:H′=?=。3)污水流經(jīng)量水設(shè)備的水頭損失。表41各構(gòu)筑物污水水頭損失計算表構(gòu)筑物名稱水頭損失(cm)構(gòu)筑物名稱水頭損失(cm)格柵10~25雙層沉淀池10~20沉砂池10~25曝氣池污水潛流池入池25~50輻流沉淀池50~60污水跌入水池50~150厭氧池10~20混合池和接觸池10~302)污水流經(jīng)連接前后兩處構(gòu)筑物管渠(包括配水設(shè)備)的水頭損失。在作初步設(shè)計時可按下表所列數(shù)據(jù)估算。為了降低運(yùn)行費(fèi)用和便于維護(hù)管理,污水在處理構(gòu)筑物之間的流動,以重力流考慮為宜(污泥流動不在此例)。(3)在作高程布置時,還應(yīng)注意污水流程與污泥流程積極配合。 高程布置方法(1)選擇兩條距離較低,水頭損失最大的流程進(jìn)行水力計算。但同時考慮到構(gòu)筑物的挖土深度不宜過大,以免土建投資過大和增加施工上的困難。而應(yīng)選取經(jīng)常出現(xiàn)的高水位作為排放水位,當(dāng)水體水位高于設(shè)計排放水位時,可進(jìn)行短時間的提升排放。 (5)需要排放的處理水,在常年大多數(shù)時間里能夠自流排放水體。 (3)預(yù)處理構(gòu)筑物之間跌水等浪費(fèi)水頭的現(xiàn)象,充分利用地形高差,實現(xiàn)自動流水。 高程布置原則(1)算管道沿程損失,局部損失,各處理構(gòu)筑物,計量設(shè)備及聯(lián)絡(luò)管渠的水頭損失;考慮最大時流量,雨天流量和事故時流量的增加,并留有一定余地;還應(yīng)考慮當(dāng)某作構(gòu)筑物停止運(yùn)行時,與其并聯(lián)運(yùn)行的其余構(gòu)筑物及有關(guān)的連接管渠能通過全部流量。污水處理廠污水處理高程布置的主要任務(wù)是:確定各構(gòu)筑物和泵房的標(biāo)高,確定處理構(gòu)筑物之間連接管(渠)的尺寸及其標(biāo)高,確定污水提升泵的揚(yáng)程。(1) 處理構(gòu)筑物的布置應(yīng)緊湊,節(jié)約土地并便于管理;(2) 處理構(gòu)筑物的布置應(yīng)盡可能按流程順序布置,以避免管線迂回,同時
點(diǎn)擊復(fù)制文檔內(nèi)容
環(huán)評公示相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號-1