焦化废水处理设计说明书详解.doc

1200t/d焦化废水处理工程设计 张汉德 摘要 本设计是1200t/d焦化废水的处理设计，在本设计的原水含有化学需氧量CODCr为2800-4000mg/L，生化需氧量BOD5800-1200mg/L,悬浮物SS200-500mg/L, pH6-9, 氨氮NH3+-N300-800mg/L。处理后水质要求达到《污水综合排放标准》。 本设计选定了A2/O（厌氧—缺氧—好氧）处理工艺对焦化废水进行处理。通过格栅、气浮浮选去除油粒等杂质，然后再通过 A2/O 生化法进行脱氮处理，生化出水进入混凝反应器进一步去除COD，经过后续的平流沉淀池和混凝沉淀池处理后，保证出水水质符合要求。而污泥则统一交于专业的环保公司处理。 经过处理后，出水将会达到化学需氧量CODC=60mg/；生化需氧量BOD5=20mg/L；悬浮物SS=20mg/L；氨氮NH3+-N =15mg/L；pH =6-9。符合本设计要求的标准。 通过设计计算确定了各构筑物的尺寸以及设备的选型，对系统的操作和控制做出说明，并对此项目投资及运行费用作出了概算。 经过计算，本设计的土建费用达到134832.48元元元 关键：1200t/d of coking wastewater treatment engineering design  Zhang Hande Abstract  The design is 1200t / d of coking wastewater treatment design, in the design of the raw water contains a chemical oxygen demand CODCr for 2800-4000mg / L, biochemical oxygen demand BOD5 800-1200mg / L, suspended solids SS 200-500mg / L, pH6 -9, ammonia NH3+-N 300-800mg / L. Required water quality treatment, Integrated Wastewater Discharge Standard.  The design selected A2 / O (anaerobic - anoxic - aerobic) process for coking wastewater treatment. Through the grille, air-flotation to remove impurities such as oil tablets, and then through the A2 / O nitrogen removal method to deal with chemical and biological, chemical and biological reactor effluent into the coagulation further remove COD, after a follow-up to the stratosphere and mixed sedimentation tanks condensate after sedimentation tanks to ensure water quality meets the requirements. The sludge is uniform in cross-professional company to deal with environmental protection.  After treatment, the water will reach the chemical oxygen demand CODCr = 60mg /L; Biochemical Oxygen Demand BOD5 = 20mg / L; suspended solids SS = 20mg / L; Ammonia NH3+-N = 15mg / L; pH = 6-9 . Design requirements in accordance with the standards. Through the design and calculation to determine the size of the structures, as well as equipment selection, system operation and control of explanation, and the project investment and operating cost estimates made.  After c