【文章內(nèi)容簡介】 N ≤25mg/l 根據(jù)進水水質(zhì)和出水水質(zhì)的要求，顯然簡單的機械處理不能滿足要求，因此本工程將采用厭氧 —好氧生物處理的方式以達到上述要求。 According to the requirements of inlet and outlet water quality, apparently simple mechanical processing cannot meet the requirements of this project. Therefore, anaerobic + aerobic process is adopt to meet above requirements. 第三章 污水處理工藝的確定 青 島 國 橋 進 出 口 有 限 公 司 Qingdao ChinaBridge Import amp。 Export Co.,Ltd. 4 Chapter Three Wastewater treatment process 第一節(jié) 處理工藝選擇 Section One Treatment process 污水處理工藝的選擇直接關(guān)系到出水水質(zhì)指標(biāo)能否達到要求，關(guān)系到運行是否穩(wěn)定可靠，管理是否方便以及投資和運行成本的高低。因此，慎重選擇適當(dāng)?shù)奶幚砉に囀俏鬯幚碓O(shè)計的關(guān)鍵。 The choice of wastewater treatment process will directly affect to the outlet water quality, steadily running, management, investment and operation cost. Therefore, careful selection of appropriate treatment technology is the key for wastewater treatment. 糖蜜酒精廢水是高濃度、高溫度的有機廢水，因此簡單的機械和物化的方法不能保證污水處理的穩(wěn)定達標(biāo)排放，高濃度有機廢水如果直接進行好氧處理，勢必會造成能耗過高，從而增加污水處理的運行成本，而單獨的厭氧處理也不能直接達標(biāo)排放。 因此，本污水處理工程采用厭氧 +好氧的處理方法。 The molasses alcohol wastewater is anic wastewater with high concentration and high temperature. So simple mechanical and physicchemical method cannot guarantee the qualified discharge of wastewater. If directly use aerobic treatment for high concentrated anic wastewater, it will lead to high cost. And the anaerobic treatment alone cannot reach the requirement either. Therefore, the wastewater treatment project adopts anaerobic + aerobic treatment. 一、厭氧工藝的選擇 / Anaerobic process 目前應(yīng)用于高濃度廢水處理成熟的厭氧方案主要有 UASB 和 BIC,因此針對這兩種厭氧工藝進行比較如下： At present, there are two kinds of mature process, UASB and BIC, to dispose the high concentrated wastewater. therefore, pare the both processes as follows: （一） UASB 厭氧反應(yīng)器 / UASB anaerobic reactor UASB 即為上流式厭氧污泥床反應(yīng)器，為第二代厭氧反應(yīng)器的典型代表。整個反應(yīng)器主體可分為兩個區(qū) 域：反應(yīng)區(qū)和氣、液、固三相分離區(qū)。污水通過水泵提升到厭氧反應(yīng)器的底部，利用底部的布水系統(tǒng)將污水均勻地布置在整個截面上，同時利用進水的出口壓力和產(chǎn)氣作用，使廢水與高濃度的厭氧污泥充分接觸和傳質(zhì)，將廢水中的有機物降解。廢水在反應(yīng)區(qū)緩慢上升，進一步降解有機物。氣體、水、污泥在同時上升過程中，沼氣首先進入三相分離器內(nèi)部通過管道排出，污泥和廢水通過三相分離器的縫隙上升到分離區(qū)，污泥 在分離區(qū)沉淀濃縮并回流到三相分離器的下部，保持厭氧反應(yīng)器內(nèi)的生物量，沉淀后的出水通過管道排出罐外。 青 島 國 橋 進 出 口 有 限 公 司 Qingdao ChinaBridge Import amp。 Export Co.,Ltd. 5 UASB is upflow anaerobic sludge blanket reactor, it is the typical representative of the second generated anaerobic reactor. The whole reactor can be divided into two regions: reaction zone and threephase separation zone of gas, liquid and solid. Upgrade the wastewater to the bottom of anaerobic reactor by water pump, distribute the wastewater on the whole section by use of water distributor, meanwhile, utilize the outlet pressure and aerogenesis to make wastewater and high concentrated anaerobic sludge have enough contact and mass transfer, and finally degrade the anic matter in wastewater. The wastewater slowly rise in the reaction zone and further degrade the anic pounds. In the ascent process of gas, water and sludge, the biogas first enter the threephase separator and then discharge through pipeline, meanwhile, the sludge and wastewater upgrade to the separation zone through the gap. The sludge concentrate and return back into the down part of threephase separator to keep the biomass in anaerobic reactor, and the water after precipitation drainage through pipe. （二） BIC 厭氧反應(yīng)器 / BIC anaerobic reactor BIC 為我公司自主開發(fā)研究的內(nèi)外雙循環(huán)厭氧反應(yīng)器，代表了當(dāng)今厭氧反應(yīng)器的最高水平。它是由布水器、提升裝置、三相分離器、氣液分離器、罐體及出水系統(tǒng)等組成。 BIC is internal and external double loops anaerobic reactor, researched and developed by our own pany. It represents the highest level of present anaerobic reactor, posed by water distributor, upgrading device, threephase separator, gasliquid separator, tank, water discharge system, etc. 可以理解 BIC 是由上、下兩個 UASB 組成的兩個反應(yīng)室，下反應(yīng)室負荷高，上反應(yīng)室負荷低，在反應(yīng)器內(nèi)部，對應(yīng)分為三個反應(yīng)區(qū)。 That is, the BIC is two reactors posed by upper and lower UASB. The lower reactor has high load and the upper reactor has lower load. Inside the reactor, there are three reacting areas. 分離區(qū) 反應(yīng)區(qū) UASB 反應(yīng)器結(jié)構(gòu)示意圖 出水 進水 沼氣 布水系統(tǒng) 三相分 離器 青 島 國 橋 進 出 口 有 限 公 司 Qingdao ChinaBridge Import amp。 Export Co.,Ltd. 6 ① 高負荷區(qū)：借助于本公司的專利防堵 塞的布水系統(tǒng)，高濃度的有機廢水均勻進入反應(yīng)器底 部，完成與反應(yīng)器內(nèi)污泥的充分混合，由于內(nèi)循環(huán)作 用、高的水力負荷和產(chǎn)氣的攪動，導(dǎo)致反應(yīng)器底部的 高濃度的顆粒污泥呈良好的流化狀態(tài)，使廢水 與污泥 能夠充分接觸，如此良好的傳質(zhì)作用和較高的污泥活 性保證了BIC反應(yīng)器具有較高的有機負荷和有機物去 除率。 ① Highload area: With the pany39。s patented anticlogging water distribution system, high concentrated anic wastewater enters into the bottom of reactor, carry out the fully mixed with sludge. Due to the internal cycle affection, high water load and gas stirring, the high concentrated granular sludge is in good flow status, the wastewater and sludge will fully contact. Therefore, good mass transfer and high sludge activity ensure the anic load and removal rate for BIC reactor. ② 低負荷區(qū)：低負荷區(qū)也是精處理區(qū)， 在這個反應(yīng)區(qū)內(nèi)水力負荷和污泥負荷較低，因此可以 有效的對廢水中的有機物進行精處理。 in which ② Low load area: It is polishing unit, area, the hydraulic load and sludge load is lower. So the anic matter will be effectively removed from the wastewater. ③ 沉降區(qū)： BIC反應(yīng)器頂部為污泥沉降區(qū)，有機物已基本去 除，廢水中的少量懸浮物在本區(qū)內(nèi)進一步進行沉降，保證 BIC出水水質(zhì)。 ③ Settlement area: The top area of BIC reactor is settlement area. The anic matter has been basically removed and small amount suspended matter in wastewater will have further settlement, which ensures the BIC out