The Technology Research And Engineering Application Of The Second Sewage Treatment Plant Of Chuzhou Anhui

This topic mainly analysis the second inlet water quality of water and sewage treatment of chuzhou city of anhui index properties, purpose is through the research on water quality and analyzing the running flow field of advanced computer simulation technology in engineering analysis, find suitable for the treatment process, the study on sewage treatment process and computer play a reference role in engineering application and the demonstration:1, in view of wastewater quality and water quality requirements, the system analysis to determine the core process; 2, 3 d model was applied, the oxidation ditch has carried on the dynamic simulation of flow field; 3, systematic process of engineering design and field sampling analysis of the project operation, verify the rationality of the design parameters and design, etc. 4, in engineering economic analysis.Paper for more than four research content was studied, this paper mainly got the following results:1. Through the analysis of the wastewater quality and quantity of chuzhou determine its design total scale of 150000 m3 / d, one of the phase of the project is 50000 m3 / d; Predict the water quality of CODcr 400 mg/L, BOD5, 200 mg/L, SS 250 mg/L, TN 35 mg/L, NH3- N 40 mg/L, TP 3 mg/L. Through analysis and comparison, this topic type wastewater treatment using improved biological denitrification and phosphorus removal oxidation ditch process(that is, the improved oxidation ditch process), the processed water quality meet the national "(GB18918-2002)urban sewage treatment plant pollutant discharge standard" level 1(B) standards; Concentrated sludge dewatering sinotrans disposal after drying to the moisture content is below 50%.2. Part of the secondary sewage treatment using a modified type of nitrogen and phosphorus oxidation ditch wastewater treatment craft, the law is in an ordinary card [21] Brussels oxidation ditch before adding a anaerobic zone and anoxic zone, and in anaerobic anoxic zone set up more water and form a good nitrogen removal effect of wastewater treatment process, it combines the A2/O method and the method of oxidation ditch, the advantages of good water quality and shock load capacity is strong, not easy to happen, high nitrogen removal efficiency, sludge bulking sludge are stable, The average flow velocity in the 0.36 m/s,power consumption province, easy to automatic control, etc. Used in the design of 3D model building, the oxidation ditch for the dynamic simulation of the flow field and fluid simulation software is a computer technology and the successful experience of sewage treatment process.3. The design of sewage system USES "pretreatment(thickness of grating with + aeration settling pool) + improved oxidation ditch peripheral radial flow sedimentation tank + week + uv disinfection technology, the system technical route mature, denitrification and phosphorus removal effect is good, stable operation, cost saving, etc.Design part adopts integrated mechanical concentrated sludge dewatering sludge treatment process, short process flow, the method system of high degree of automation; Cover an area of an area small, no need for new covers and civil engineering; Equipment is simple, safe and reliable; Less investment, low operating cost.4. The project total investment 97.1094 million yuan, the unit water business cost 0.62 yuan/m3.5. Since the project built and put into trial operation in 2013, the measured value is close to the water design index, design of the water completely. 2013 statistical data of the measured average water CODcr 280mg/L,BOD5140mg/L,SS 230mg/L,TN 28mg/L,NH3-N 35mg/L,TP 2.3mg/L. Treatment effect is good, the improved oxidation ditch running effect stable, is a successful engineering design practice.