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-文庫吧
2025-04-16 22:50 本頁面
【正文】 負(fù)電荷，從而消除了一些陽離子聚合物的需求。 不同的機(jī)制導(dǎo)致不同的空調(diào)需求。氯化鐵和明礬是更有效地消除較大規(guī)模的蛋白質(zhì)和多糖分子（大于 30K）。無機(jī)混凝劑，也更有效的生物聚合物和化學(xué)需氧量釋放更大。應(yīng)考慮使用無機(jī)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(shí)發(fā)生。 其次是用明礬和陽離子高分子絮凝劑大大降低空調(diào)化學(xué)學(xué)院站成本的空調(diào)溫曝氣相結(jié)合。成本相近或低于，需要溫厭氧消化。 濾 液 回收 化學(xué)需氧量明顯減少，廠內(nèi)發(fā)泡大學(xué)是很大程度上消除了采用組合的中溫曝氣和利用明礬。 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。 effects of magnesium on settling properties。 effects of sodium, potassium, calcium and magnesium on effluent quality。 effect of solids retention time on effluent quality。 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, dewatering, magnesium, ammonium. Introduction Activated sludge is p
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