英语翻译本次毕业设计题目为城市污水处理厂的初步设计,处理量为26000m3/d.污水处理工艺流程选择是根据原水水质、出水

英语翻译
本次毕业设计题目为城市污水处理厂的初步设计,处理量为26000m3/d.污水处理工艺流程选择是根据原水水质、出水水质要求,污水处理厂规模、污泥处置方法及当地的温度、工程地质、征地费用、电价等实际条件和要求,选择切实可行且经济合理的处理工艺方案,经全面比较后优选出最佳的总体工艺方案和实施方式.
本次设计采用A2/O工艺.A2/O工艺亦称A-A-O工艺,是英文Anaerobic-Anoxic-Oxic第一个字母的简称（生物脱氮除磷).按实质意义来说,本工艺称为厌氧-缺氧-好氧法,生物脱氮除磷工艺的简称.其构造是在A/O工艺的厌氧区之后、好氧区之前增设一个缺氧区,好氧区具有硝化功能,并使好氧区中的混合液回流至缺氧区进行反硝化,使之脱氮.污水在流经三个不同功能分区的过程中,在不同微生物菌群作用下,使污水中的有机物、氮和磷得以去除,达到同时进行生物除磷和生物除氮的目的.经过处理,污水水质达标,其中出水的BOD5的值18mg/L；出水的CODCr的值为51mg/L；出水的NH3-N的值为6mg/L；出水的TP的值为0.25mg/L.

The graduation design topic for preliminary design of urban sewage treatment plants, onyx 26000m3 / d for. Sewage treatment process selection is based on raw water quality, outlet water quality requirements, sewage treatment plant scale, sludge disposal method and the local temperature, engineering geology, the land cost, electricity price actual conditions and requirements, the choice is feasible and economic and reasonable process scheme selection by compared all-round, after the best overall technical scheme and implementation ways.
This design USES A2 / O process. A2 / O process also say A - A - O craft, is English Anoxic Oxic Anaerobic - the first letters - as (biological nitrogen phosphorus). According to the essence sense, this process is called anaerobic - aerobic method, oxygen - biological nitrogen phosphorus removal process abbreviation. Its construction is in the A/O process, after the anaerobic zone aerobic area, add A anoxia area before aerobic area, and with nitration function of aerobic zone backflow to anoxia area mixture of denitrification, take off nitrogen. Sewage flows through three different functional partition in the process of microbe groups in different under the action of organic matter, sewage, nitrogen and phosphorus removal, achieve simultaneously to biological phosphorus removal and biological nitrogen purposes. Except After treatment, the wastewater quality standards, including the value of the effluent BOD5 18mg/L; The value of the CODCr water for 51mg/L; Out of the water for the value of the form-nh3 - N 6mg/L; The value of the water for the TP 0.25 mg/L