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石化含油廢水處理工藝設計__本科畢業論文

石化含油廢水處理工藝設計__本科畢業論文

題 院 專 班 目: 系: 業: 級: A/O 工藝處理石化污水的設計 學生姓名: 指導教師: 論文提交日期: 論文答辯日期: 年 年 月 月 日 日 摘要 本設計的題目是設計一座化工污水處理廠。該污水處理廠位于某石 油化工廠內,其處理的污水量為 3.6 萬噸/天,初始的 BOD5 的濃度為 350mg/L,SS 的濃度為 450 mg/L。 本設計采用的工藝為 A/O 生物除磷系統,該工藝在污水處理方面屬 較為新穎的方法,技術較為成熟,較之普通的污水處理工藝有其不可比 擬的優點,在經濟和技術上都有明顯的優勢。出水指標能達到國家二級 排放標準。 該工藝的流程是:污水經粗格柵去除大體積的雜質,再經過調節池 對初進的污水進行整流和均質,由細格柵進入隔油池,主要是去除懸浮 于污水中的油類物質。接著污水進入厭氧池,可吸收去除一部分有機物, 并釋放出大量磷,設計為矩形反應池。污水又進入好氧池,使廢水中的 有機物得到好氧降解,同時污泥將大量攝取廢水中的磷。設計為推流式 矩形反應池。再經由配水井流入二沉池排放,二沉池的污泥經回流泵房 后剩余污泥通過污泥泵打入厭氧池,使得污水中的 BOD5、SS 達標排放。 同時,在此污水處理過程中產生的污泥量較少,經簡單的濃縮池濃縮、 脫水后外運。 本設計采用可靠的安全措施,合理布局,美化環境,把污水處理廠 建成一個花園式的廠區。 關鍵詞: 厭氧 好氧 A/O 生物除磷系統 Abstract:The title of this thesis is to design a small municipal sewage treatment plant. This plant lies in the suburb of some district. It can dispose 36,000 cube sewage every day. The primary concentration of BOD5 and SS is400mg/L and350 mg/ L. The process of this thesis is man-made wetland treatment system, which is a new pathway in the sewage treatment. The technique of this process is offer comparative advantages in economic and technology. The quality of disposed effluent is up to the second class of national standard. The first step of this process is screening, which removes big-sized trash. Then the comminuting device commutate and shred the solids in the sewage and the waste flow into the primary setting tank through the mesh grid ,The sewage go throughthe thin grill to the initial sinking pond, at this step the solid suspension which may precipitate in the sewage are removed . According to request and this craft characteristic which designs needed, take the spoke to flow the type sedimentation pond.Afterwards the sewage enters tires of the oxygen pond, may absorb removes part of organic matters, and releases the massive phosphorus. The interior design of the tires of the oxygen pond is the rectangle.When the sewage enters the oxygen pond,the organic matter in the waste water are degraded by the good oxygen, simultaneously the sludge massively will absorb the phosphorus in the waste water. Responded the pond design for pushspread the type rectangle response pond, the design specification is the same as the initially sinking the pond.Two sink the dirty mire of the pond was passed by dirty mire in surplus in empress in pump house in reflux the dirty mire pump beats in to lack to keep the pond , at which the BOD5 and SS of the waste are up to the national standard, Because less sludge was made during this process of treatment, so after conc

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