华东师范大学期末试卷(A) 200×-200×学年第二学期 课程名称:环境工程概论(双语) 学生姓名: 学号: 专业: 年级/班级: 课程性质:公共必修、公共选修、专业必修、专业选修 四五六七|八总分阅卷人签名 样题: 1. Please draw a schema tic diagram of the municipal wastewater treatment process and explain in de tails the principles involved in each treatment step (in English, 20%). 2. A rectangular settling tank has a wastewater flowrate of 3000m/d and dimensions of 3m deep by 5m wide by 10m long. The ss concentra tion of the wastewater is 200mg/L. Please determine its: lhydraulic retention time; (2)overflow rate(surface area);3 Ss loading rate If the ss removal efficiency is 50%, please determine the ss quantity removed daily (in Chinese, 20%) 3. What are the purposes of aeration in wastewater trea tment. List the types of aerators and discuss their advantages and disadvantages( in English, 15%). 4. What are the differences between aerobic biolog ical transformations(aerobic compost) and anaerobic biological transformations (anaerobic compost) of municipal solid wastes? (definition, reaction equation, biological conversion step corresponding organisms, environmental factors)(in Chinese, 20%) 5. Please discuss the purposes of microscopic observa tion of activated sludge for wasterwater biological treatment systems(in English, 10%) 6. Please list the four types of gravitational sedimenta tions and discuss their characteristics and occurrences in wastewater treatment(in Chinese, 15%) 标准答案 1.(1)flow diagram Influent Biological treatment channel sedimentation (activated sludge or clarifier isinfection effluent Waste les of each ste I Treatment unit Principles and functions it channels, Removing pollutants( rags, sticks, floatables, grit, grease华东师范大学期末试卷（A） 200×—200× 学年第二学期 课程名称：_环境工程概论（双语） 学生姓名：___________________ 学 号：___________________ 专 业：___________________ 年级/班级：__________________ 课程性质：公共必修、公共选修、专业必修、专业选修 一 二 三 四 五 六 七 八 总分 阅卷人签名 样题： 1. Please draw a schematic diagram of the municipal wastewater treatment process and explain in details the principles involved in each treatment step(in English, 20%). 2. A rectangular settling tank has a wastewater flowrate of 3000m3 /d and dimensions of 3m deep by 5m wide by 10m long. The SS concentration of the wastewater is 200mg/L. Please determine its:(1)hydraulic retention time; (2)overflow rate(surface area); (3)SS loading rate. If the SS removal efficiency is 50%, please determine the SS quantity removed daily(in Chinese, 20%). 3. What are the purposes of aeration in wastetwater treatment. List the types of aerators and discuss their advantages and disadvantages(in English, 15%). 4. What are the differences between aerobic biological transformations(aerobic compost) and anaerobic biological transformations(anaerobic compost) of municipal solid wastes?(definition, reaction equation, biological conversion step, corresponding organisms, environmental factors) (in Chinese, 20%) 5. Please discuss the purposes of microscopic observation of activated sludge for wasterwater biological treatment systems(in English, 10%) 6. Please list the four types of gravitational sedimentations and discuss their characteristics and occurrences in wastewater treatment(in Chinese, 15%). 标准答案 1. (1)flow diagram (2)principles of each step Treatment unit Principles and functions Screens, grit channels, Removing pollutants(rags, sticks, floatables, grit, grease, Influent Grit channel Primary sedimentation Biological treatment (activated sludge or biofilm) secondary clarifier disinfection effluent Waste sludge Screen