污水處理外文翻譯---絮凝：污泥性質(zhì)和廢水處理的影響-環(huán)境工程-wenkub
2023-05-18 22:50:59 本頁面
【正文】 子 。 bruus 等人。因此，除了規(guī)定的化學(xué)品在工業(yè)過程和廢水預(yù)處理的廢水進入激活污泥盆地的陽離子組成。希金斯和諾瓦克（ 1997年 b）評估從七個工業(yè)設(shè)施的陽離子和發(fā)現(xiàn)，時的上chargeequivalent 的基礎(chǔ)上的單價超過二價陽離子比（ M / D） 2，在脫水性能（具體到過濾阻力）發(fā)生惡化。 工業(yè)體系研究含有高濃度的鈉離子（平均為 2020毫克 /升）加入氫氧化鈉預(yù)處理步驟，以防止醋酸的揮發(fā)。工業(yè)廢水處理系統(tǒng)被發(fā)現(xiàn)有極端貧困的沉降和脫水性能由于高濃度的鈉離子。該實驗室的研究是一個有效的田間試驗的序幕。前一個時間差可以預(yù)計實現(xiàn)沉降性能的改進?？磥?，銨離子活性污泥絮體在類似的方式，以鈉離子相互作用，導(dǎo)致可溶性蛋白的釋放和脫水性能惡化。如果需要進一步改善，長期戰(zhàn)略是必不可少的。 結(jié)論 2 實驗室和現(xiàn)場進行了研究，評估調(diào)節(jié)選項 ATAD 污泥脫水。無機空調(diào)消除陰離子 biocolloids 有效。前凝血與無機調(diào)理污泥將減少溶液中的負電荷，從而消除了一些陽離子聚合物的需求。應(yīng)考慮使用無機化學(xué)混凝劑，在消化過程中釋放大量的蛋白質(zhì)，多糖和 COD 時發(fā)生。 BIOFLOCCULATION: IMPLICATIONS FOR ACTIVATED SLUDGE PROPERTIES AND WASTEWATER TREATMENT ABSTRACT Studies were conducted to determine the role of bioflocculation in the unit processes. Laboratory and fullscale studies revealed that bioflocculation is important in determining settling, dewatering, effluent and digested sludge properties(activated sludge properties) and may be vital to the function of all processes related to the above properties. In these studies, it was shown that divalent cations such as calcium and magnesium improved activated sludge properties, whereas monovalent cations such as sodium, potassium and ammonium ions were detrimental to these properties. The divalent cations promoted bioflocculation through charge bridging mechanisms with negatively charged biopolymers (mainly protein and polysaccharide). It was found that oxidized iron plays a major role in bioflocculation and determination of activated sludge properties through surface interactions between iron and biopolymers. Oxidized iron was effective in removing colloidal biopolymers from solution in coagulation and conditioning studies. The research included experiments evaluating effects of potassium and ammonium ions on settling and dewatering properties。 and evaluation of floc properties during aerobic and thermophilic digestion. A floc model is proposed in which calcium, magnesium and iron are important to bioflocculation and the functionality of aeration tanks, settling tanks, dewatering equipment and aerobic or anaerobic digesters. It is shown that activated sludge floc properties affect wastewater treatment efficiency. Keywords ： Cation, activated sludge, settling, dewate
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