分段进水脱氮工艺试验分析-市政工程专业论文.docxVIP

西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 翻udy aod Analysis 00 诞e feed Nitrogeo Removal Activated Sludge Procωs Speeialty: Envirorunental Engineering Name: Huang Libin Ins仕uctor: Prof. Peng Dangcong ABSTRACf The continuous influent step-feed anoxic/oxic reactor and step-feed Sequencing Batch Reactor were conducted for treating municipal w部;  tewater at Beishiqiao 臼wage purification 臼nter in Xian. The removal effi民t ofthe 0咆anic matt衍， the charact回到ic of nitrogen removal 创KI transformations of various pollutants in the reactor is mainly discus优din 由is 创ud)巳 ηle results of ∞ntinuous influent anoxic/oxic reactor as follows:ηle design influent f10w is 160νh and splitting to four points in the ratio of 4:3:2:1，也e AJO volume ratio is set on 1:3 for each p臼s. 50% rate of return activated sludge 俱AS)， 7.5-hour hy，创.ulic retention time (HRT)and 12也y sludge retention time (SRT). Wi也 the coilditions，the average removàl effiCiency of TCOD，SCOD，NH3-N，TN ànd TP can reach t090.31%， 81.53% 97.24%，66.29% and 80.13%. The results of sequencing batch reactor 臼follows:ηle desisn ínf1uent f10w is 5L ín a period and splittirig to three points iil the ratio of 4:3:3 and 12-day sludge retention time(SRT)， 18 hour hydraulic retention time (HR1η).Under the conditions，the average removal e cieticy ofTCOD，SCOD，NH3-N，TN and TP can reach to 91.05%，85.03%， 97.7佛也， 68.29% 血d83.73%. Batch experlments 缸e operated 岛r the ∞ntinuous influent anoxic/oxic reactor to determine the specific oxygen uptake rate，the specific ammonium uptake rate and the 叩创且cdeni创直叫onr晦.The results are 35.09 mgO灿怔;VSSh，5.81 mgNH3-N1快也;VSS.h and 21.22 mgNO-3-N/阶1LVSS.h respectively. They show that the activated sludge has high activity in the rnixed liquid. In concJusion，the two types of step-feed process are an effective technology of II \l. nutrient removal for municipal w臼tewater treatment.Because of the di能rences in HRT between the continuous inf1uent 如p在ed anoxic/oxic r .ctor and step-feed Sequencing Batch Reactor，the