本文選題：給水污泥　切入點：脫水　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國不斷的發(fā)展,人們對自來水的需求量也隨著增多,因此給水處理所產(chǎn)生的污泥量也隨之增加,合理的將污泥資源化利用是目前急需解決的問題。磨盤山凈水廠的水處理量較大,凈水廠每日所生產(chǎn)的干泥量為28 t,若直接排放對給水污泥這一資源是很大的浪費。磨盤山水庫處于寒區(qū),其水質(zhì)特點為低濁度高色度水,污泥顆粒的粒徑在40?m-90?m之間,粒度非常細小,容易進一步資源化利用。對污泥的脫水特性進行研究,比較三種脫水劑PAM、PAC、PFC的脫水效果,得出濃度為0.2%的陽離子型聚丙烯酰胺投加量為3 m L時污泥含水率達到80%時,所需的投加量最少。將脫水至80%的污泥作為主要原料以膨潤土作為輔助原料進行陶粒的制備,得出原料比為70%:30%(含水率80%的給水污泥:膨潤土),焙燒溫度為1100℃條件下的陶粒對氨氮的吸附最好。利用最佳參數(shù)所焙燒的陶粒對廢水中的氨氮進行吸附試驗,研究了反應(yīng)時間對氨氮吸附的影響以及投加量對氨氮吸附的影響。試驗結(jié)果顯示隨著反應(yīng)時間的增加,陶粒對氨氮的吸附量也增加,但當達到某一臨界點時,吸附量基本沒有變化,該點為吸附的平衡濃度,為7.2013 mg/L;隨著陶粒投加量的增加,廢水中氨氮不斷的被吸附掉,其去除率升高,但吸附量卻隨著投加量的增加而不斷地降低。對飽和吸附的陶粒進行解吸再生試驗,結(jié)果表明用給水污泥制備的陶粒經(jīng)過四次解吸再生后還可以用于去除氨氮,由此可見污泥又進一步得到了資源化。將試驗數(shù)據(jù)與一級動力學(xué)模型和二級動力學(xué)模型進行擬合,得出給水污泥陶粒對氨氮的吸附符合二級動力學(xué)模型,是化學(xué)吸附。對其進行進一步分析得知顆粒內(nèi)擴散是吸附過程的限速步驟,但不是唯一的控速步驟。最后對陶粒制備的經(jīng)濟效益進行了系統(tǒng)的分析,進一步說明了其資源化利用的價值。
[Abstract]:With the continuous development of our country, people's demand for tap water is also increasing, so the amount of sludge produced by water treatment is also increasing. The rational utilization of sludge is an urgent problem at present. The water treatment capacity of Mopanshan Water purification Plant is large. The dry sludge produced by the water purification plant is 28 t per day. It is a great waste to discharge sludge to feed water directly. The water quality of Moanshan Reservoir is in cold area, its water quality is characterized by low turbidity and high color water, and the diameter of sludge granule is 40? M-90? The dewatering characteristics of sludge were studied, and the dehydration effects of three dehydrators, PAM- PAC- PFC, were compared. When the concentration of cationic polyacrylamide is 3 mL, the minimum amount of sludge is needed when the water content of sludge reaches 80 mL. The sludge with dehydration to 80% is used as the main raw material for the preparation of ceramsite with bentonite as the auxiliary raw material. The results show that the ratio of raw material to raw material is 70: 30 and the ratio of feed water sludge to bentonite is 80%. The best adsorption rate of ammonia nitrogen is obtained when the calcination temperature is 1100 鈩，

本文編號：1617634