1. explain the difference between pretreatment,primrary treatment,secondary treatment, and tertiary treatment,and show how they are related. 前处理的目的是用於保护後续污水处理厂(WWTP)的单元设备，再一些旧都市废 水处理场中可能不包括调匀池。 初级处理的主要目的是去除废水中沉降或浮除下来的污染物，且应假设包含前 处理程序如:拦污栅、沉沙池及调匀池。 二级处理的主要目的是去除由初级处理程序流出的溶解性BOD5，并进一步去除 悬浮固体物，同样地二级处理应假设包含所有初级处理程序。 三级处理程序可能使用化学处理及过滤，或将二级处理放流水小心地灌注入土 壤中，利用土壤去除污染物，这些程序能够去除高达99%BOD5、磷、悬浮固体和细菌，及 95%的含氮物质，产生的放流水相当乾净。 2. for each type of decomposition(aerobic,anoxic,and anaerobic), list the electron acceptor,important end products, and relative advantages as a waste treatment process. Aerobic Anoxic Anarobic Electron acceptor O2 NO3- CO2 & organic compounds End products CO2,H2O N2,CO2,H2O CH4,CO2,H2O bacterial cells bacterial cells bacterial cells Odor potential Low Low High Ecosystem Healthy systems Upper Hypolimnion Sediments WWT Dilute wastes Denitrification Sludge Stabalization 3. sketch and label the bacterial growth curve for a pure culture. define or explain each phase labeled on the curve. http://imgur.com/3L3AIlW 迟滞期:细菌自我调整以适应新环境，开始合成新的原生质。 加速生长期:迟滞期末端，细菌开始分裂，使族群逐渐增加。 对数生长期:加速生长期末端，生物族群数量已经够大，且世代间的差异很小，细胞以固 定的生长速率分裂，族群数目呈几何数列增加。 静置期:由於基质被消耗或产生毒性副产物，始对数生长逐渐变小，因此当停止分裂或死 亡和生长速率达平衡时，生物族群会在某一点上成定值。 死亡期:静置期後，细菌开始快速的死亡。 4. define θc SRT,and sludge age, and explain their use in regulating the activated sludge process. average amount of time that microorganisms are kept in the system. It is used for controling microorganisms to degrade BOD most efficiently. 5. explain the purpose of the F/M ratio and define F and M in terms of BOD5 and mixed liquor volatile suspended solids. F = Food = organic materials = BOD5 M = microorganisms = mixed liquor volatile suspended solids Purpose: to determine return sludge volume 6. explain the relationship between F/M and θc. long SRT = low F/M short SRT = high F/M 7. define SVI. Sludge volume index: measurement of settleability of sludge and maintain sufficient concentration of activated sludge. -- 我准备好了 我相信考古题 我一定可以 --

※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 140.112.245.132 ※ 文章网址: http://webptt.com/cn.aspx?n=bbs/NTUBSE-B-101/M.1418737715.A.54A.html