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(2)Design should take full account of the protection of resources.According to technical feasibility and economic reasonableness to utilization the energy, water, land and other resources .
(3)Design should conscientiously implement the national economic construction principles and policies.These policies include industrial policy, technology policy, energy policy, environmental policy, etc.Correctly handle between various industries, between long-term and recent, production and other aspects of life, the relationship between.
(4)Engineering design to adhere to safe and reliable, quality first principle.Safe and reliable means after completion of the project, to maintain long-term safety normal production.
(5)Adhere to the principle of economical and reasonable.Financial resources in our country under the conditions of the project construction investment of the project objectives (product solutions, the scale of production), go to investment, short construction period, technical and economic indicators of the best results.
In recent years, a variety of coking wastewater treatment technology research is very active mainly physical, chemical, biochemical and physical,chemical method.Most major integrated coking plant using biochemical and physical,chemical treatment of coking wastewater.Combined with the design of wastewater characteristics, this design will be applied "Resident + materialization" approach to deal with.
Biochemical method is the use of microbial oxidation, decomposition, adsorption of organic pollutants in waste water treatment is the method most widely used in sewage treatment and effective method.In recent years, people from the microbial reactor and process research and development of several aspects of the activated sludge, biofilm, biological fluidized bed immobilized biological treatment technologies and biological nitrogen removal technology.The development of these technologies to achieve a majority of biodegradable organic matter treatment effluent quality has been greatly improved.The contrast comparison program, the design of the final selection process of .
process can be completed simultaneously organic removal, denitrification and phosphorus removal was excessive intake of other functions.Denitrification on the premise that should NH3-N be completely nitrification by aerobic tank accomplish this function, complete the anoxic denitrification capabilities combined anaerobic pond and aerobic pond complete phosphorus removal capabilities.
Key words: coking waste water； biochemical method；
目 录
1 绪论 1
1.1 我国工业污水处理现状及焦化废水处理的意义 1
1.2 我国焦化废水处理发展概况 2
1.3 本设计废水处理厂设计方案 3
1.3.1 设计任务 3
1.3.2方案设计依据标准 3
1.3.3本方案特点 4
2 废水处理工艺 5
2.1 焦化废水的组成及特点 5
2.2 目前焦化废水的处理方法 6
2.2.1 AB法工艺 6
2.2.2 延时曝气 7
2.2.3 序批式活性污泥法（SBR法） 7
2.2.4 生物脱氮工艺 7
2.2.5 生物膜法 9
2.3 本方案采用的处理工艺 10
3 焦化废水主要构筑物的设计 12
3.1预处理系统设计 12
3.1.1 调节池的设计 12
3.1.2 泵房设计 13
3.1.3 铁凝沉淀池的设计 15
3.1.4 加压溶气气浮法 18
3.2 工艺设计 19
3.2.1 工艺的原理 19
3.2.2 工艺的设计计算 20