本文選題：新型厭氧反應(yīng)器 + 低溫低負荷��； 參考：《山東大學(xué)》2017年碩士論文

【摘要】：新型過濾式厭氧生物膜反應(yīng)器結(jié)合了動態(tài)膜反應(yīng)器(DMBR)與生物膜反應(yīng)器的優(yōu)勢,結(jié)構(gòu)類似于DMBR,由膜組件上附著的動態(tài)膜完成反應(yīng)器固液分離的作用。不同于DMBR主要依靠反應(yīng)器內(nèi)懸浮污泥進行污染物去除的方式,新型反應(yīng)器的污染物去除同樣由動態(tài)膜完成,因為動態(tài)膜同時還是富含附著生長的微生物的生物膜。新型反應(yīng)器內(nèi)污水透過生物膜出水,污染物通過吸附降解和固液分離兩個過程同時完成。污水被水壓驅(qū)動透過生物膜出水,傳質(zhì)效率要高于傳統(tǒng)生物膜傳質(zhì)方式,提高了反應(yīng)器的污染物去除效率。由于反應(yīng)器內(nèi)無懸浮污泥存在,故大大緩解了膜污染問題,提高了反應(yīng)器運行穩(wěn)定性。新型反應(yīng)器使用低成本無紡布為膜組件的材料,孔徑大于微濾/超濾膜,故可以利用水頭高差自流出水,反應(yīng)器內(nèi)無需提供擾動,這兩點大大降低了反應(yīng)器運行能耗。由于厭氧處理低負荷污水所產(chǎn)出的能量較少,常用的中溫厭氧工藝會造成能量極大的浪費,本實驗采用低溫(18℃)環(huán)境運行。同懸浮生長的微生物相比,附著生長的微生物具有更好的環(huán)境適應(yīng)能力,能夠較快的適應(yīng)低溫環(huán)境。在低溫環(huán)境下,新型過濾式厭氧生物膜反應(yīng)器在HRT為12 h,出水通量為3.2 LMH的條件下連續(xù)運行了 122天。經(jīng)過微生物適應(yīng)低溫環(huán)境后,新型反應(yīng)器對于COD去除率穩(wěn)定在80%以上。由分析數(shù)據(jù)發(fā)現(xiàn),透過膜傳質(zhì)的方式較生物膜表面?zhèn)髻|(zhì),對于低溫環(huán)境擁有更快的適應(yīng)能力。同時我們對新型反應(yīng)器的過濾性能也進行了研究,在經(jīng)過了運行初期的跨膜壓差(TMP)快速上升之后,連續(xù)運行了 122天后,反應(yīng)器跨膜壓差(TMP)基本穩(wěn)定在8 cm·H_2O,在此期間無需進行任何的膜清洗,反應(yīng)器運行穩(wěn)定。新型反應(yīng)器的出水濁度一直維持在1.5 NTU以下,且無出水酸化現(xiàn)象發(fā)生,出水揮發(fā)性脂肪酸含量正常,平均為26.6 mg/L。HRT對于新型反應(yīng)器運行狀態(tài)的影響研究中,通過對比HRT分別為7.5 h和12 h的兩個新型反應(yīng)器的各種運行參數(shù)后發(fā)現(xiàn):HRT對于出水濁度的影響不大,兩個反應(yīng)器出水濁度均維持在1.8 NTU以下;對COD去除率來說,在微生物適應(yīng)了低溫環(huán)境后HRT的影響才開始顯現(xiàn)出來,在這個階段,HRT為12 h和7.5 h的COD去除率分比為77.4%和72.8%;新型反應(yīng)器在HRT更短即出水通量更大的條件下,透過膜傳質(zhì)的傳質(zhì)效率要大大高于出水通量較小的反應(yīng)器;HRT對反應(yīng)器過濾性能的影響較大,HRT為12 h和7.5 h的反應(yīng)器連續(xù)運行100天后跨膜壓差分別達到9.9和16.6 cm·H_2O。總體來看,新型過濾式生物膜反應(yīng)器基本上達到了低成本、低能耗、高效穩(wěn)定運行的要求,是一個具有很大發(fā)展?jié)摿Φ奈鬯幚砉に嚒?br/>[Abstract]:The new filter anaerobic biofilm reactor combines the advantages of the dynamic membrane reactor (DMBR) and the biofilm reactor. The structure is similar to that of the DMBR, and the dynamic membrane attached to the membrane module completes the solid-liquid separation of the reactor. Unlike DMBR, which mainly relies on suspended sludge to remove pollutants in the reactor, the removal of pollutants in the new reactor is also accomplished by the dynamic membrane, because the dynamic membrane is also a biofilm rich in attached and growing microorganisms. The wastewater in the new reactor passes through the biofilm effluent, and the pollutants are treated simultaneously by adsorption degradation and solid-liquid separation. The mass transfer efficiency of wastewater driven by water pressure through the biofilm effluent is higher than that of the traditional biofilm mass transfer method, which improves the removal efficiency of pollutants in the reactor. Because there is no suspended sludge in the reactor, the membrane fouling problem is greatly alleviated and the stability of the reactor is improved. The new reactor uses low cost non-woven cloth as the material of membrane assembly, and its pore diameter is larger than that of microfiltration / ultrafiltration membrane, so it can use the water head height difference self-flow effluent without providing disturbance in the reactor, which greatly reduces the running energy consumption of the reactor. Due to the low energy produced by anaerobic treatment of low-load wastewater, the commonly used medium-temperature anaerobic process will cause a great waste of energy, so this experiment is run in a low temperature of 18 鈩，

本文編號：1989966