【摘要】：厭氧生物處理技術(shù)是一種具有處理負(fù)荷高、能耗低、產(chǎn)泥量小和能夠產(chǎn)生甲烷氣體等優(yōu)點(diǎn)的廢水處理技術(shù)。隨著高濃度有機(jī)工業(yè)廢水排放量的增多,厭氧反應(yīng)器被廣泛應(yīng)用于高濃度有機(jī)廢水的處理。人們逐漸開(kāi)發(fā)出了形式多樣的厭氧反應(yīng)器。淀粉廢水作為高濃度有機(jī)廢水,具有很強(qiáng)的可生化性,采用新型的厭氧反應(yīng)器處理淀粉廢水逐漸成為人們研究的熱點(diǎn)。厭氧序批式反應(yīng)器(ASBR)作為第三代厭氧反應(yīng)器,因具有投資省、操作靈活、穩(wěn)定高效等優(yōu)點(diǎn)而越來(lái)越引起人們的關(guān)注。但是其啟動(dòng)時(shí)間長(zhǎng)及形成顆粒污泥粒徑小等缺點(diǎn)限制了該技術(shù)的推廣和應(yīng)用。本實(shí)驗(yàn)通過(guò)自制ASBR反應(yīng)器,采用人工配制淀粉廢水為基質(zhì)進(jìn)行啟動(dòng),探討處理高濃度淀粉廢水運(yùn)行的狀況。探索ASBR反應(yīng)器快速啟動(dòng)的方法,探究高效穩(wěn)定、操作方便、經(jīng)濟(jì)合理的處理高濃度淀粉廢水的運(yùn)行工藝方法。在ASBR反應(yīng)器啟動(dòng)的試驗(yàn)中,分別接種二沉池的剩余污泥和上流式厭氧污泥床反應(yīng)器(UASB)中厭氧污泥于相同的ASBR反應(yīng)器A和B中。在恒溫35℃、無(wú)攪拌、無(wú)任何添加物和添加一定堿度的條件下,采用逐漸增加進(jìn)水COD濃度和減少水力停留時(shí)間的方法馴化污泥,逐步啟動(dòng)反應(yīng)器。當(dāng)進(jìn)水COD達(dá)到5000 mg/L,容積負(fù)荷為5.16 g/(L·d)時(shí),兩個(gè)反應(yīng)器A和B的COD去除率分別達(dá)到86.0%和91.7%;A和B的污泥實(shí)現(xiàn)了顆�；�,污泥濃度最后分別達(dá)到21.6 g/L和24.5 g/L,污泥粒徑也分別達(dá)到1.1 mm和1.4 mm,由反應(yīng)器中顆粒污泥的形態(tài)和反應(yīng)器的運(yùn)行狀態(tài)說(shuō)明A和B啟動(dòng)成功,分別耗時(shí)75 d和61 d,實(shí)現(xiàn)了ASBR的快速啟動(dòng)。利用啟動(dòng)成功的A反應(yīng)器進(jìn)行處理高濃度淀粉廢水的試驗(yàn),繼續(xù)增加進(jìn)水的COD濃度,從5000 mg/L升高到10000 mg/L過(guò)程中,容積負(fù)荷變?yōu)?0.1 g/(L·d),期間COD去除率發(fā)生波動(dòng),通過(guò)改變進(jìn)水負(fù)荷最終穩(wěn)定在8.1g/(L·d),COD濃度8000 mg/L,去除率高達(dá)92.8%,p H值于6.8~7.2之間波動(dòng)。反應(yīng)器平穩(wěn)高效運(yùn)行一個(gè)月后,反應(yīng)器內(nèi)的顆粒污泥粒徑達(dá)到了3~5mm,污泥濃度21.84 g/L,污泥的最大沉降速度高達(dá)46 m/h,反應(yīng)器的平均產(chǎn)氣量達(dá)到402 L/kg COD,處理高濃度淀粉廢水時(shí)ASBR反應(yīng)器實(shí)現(xiàn)了高效穩(wěn)定運(yùn)行,培養(yǎng)出的顆粒污泥性能好、活性高。綜上所述,ASBR用于處理淀粉廢水時(shí),反應(yīng)器啟動(dòng)成功后能夠形成性能良好的顆粒污泥,反應(yīng)器處理高濃度淀粉廢水時(shí)表現(xiàn)出良好的運(yùn)行狀態(tài),該實(shí)驗(yàn)對(duì)ASBR在工業(yè)實(shí)踐的應(yīng)用方面提供了理論基礎(chǔ),對(duì)降低處理高濃度淀粉廢水處理的成本具有很大的指導(dǎo)意義。
[Abstract]:Anaerobic biological treatment is a kind of wastewater treatment technology which has the advantages of high load, low energy consumption, low sludge production and the ability to produce methane gas. With the increase of high concentration organic industrial wastewater, anaerobic reactor is widely used in the treatment of high concentration organic wastewater. A variety of anaerobic reactors have been developed. Starch wastewater, as an organic wastewater with high concentration, has strong biodegradability. The treatment of starch wastewater with a new anaerobic reactor has gradually become a hot research topic. As the third generation anaerobic reactor, (ASBR) has attracted more and more attention because of its advantages of low investment, flexible operation, stability and high efficiency. However, the long start-up time and the small particle size of granular sludge restrict the popularization and application of the technology. In this experiment, a self-made ASBR reactor was used to start the treatment of high concentration starch wastewater with artificial starch wastewater as the substrate. To explore the method of rapid start up of ASBR reactor and to explore the operation method of treating high concentration starch wastewater with high efficiency and stability, convenient operation and reasonable economy. In the start-up test of ASBR reactor, the excess sludge from secondary settling tank and (UASB) from upflow anaerobic sludge bed reactor were inoculated in the same ASBR reactors A and B, respectively. Under the condition of constant temperature 35 鈩，

本文編號(hào)：2278961