清华大学博士论坛会议论集16——环境、污水、能源.docVIP

第三届全国博士生学术会议 暨环境科学与工程新理论、新技术学术研讨会 连续流双污泥－诱导结晶工艺脱氮除磷试验研究 史静，吕锡武*收稿日期： 收稿日期：2009- 07 - 28 基金项目：江苏省科技厅太湖水专项（BS2007114）；江苏省科技支撑计划（BS2008667）；教育部科学研究重大项目（308010）。 作者简介：史静（1984～），女，博士研究生，主要研究方向为生活污水除磷脱氮技术和装备。E-mail：shijing_seu@163.com 通讯联系人：E-mail：xiwulu@ （东南大学能源与环境学院，南京 210096） 摘要：针对传统污水处理脱氮除磷工艺碳源不足、聚磷菌与硝化菌泥龄矛盾、磷资源无法有效回收利用等问题，开发出“双污泥－诱导结晶”新型工艺，对其连续流脱氮除磷和去除有机物的性能进行了考察。结果表明：当进水COD为152～237mg?L-1，TP为3.92～7.68mg?L-1，TN为31.3～50.5mg?L-1，C/N比约为3.91～5.21时，COD、TN和TP平均去除效率分别为93.2%、71.2%和95.7%。厌氧段COD去除量约占系统COD去除总量的85.9%。结晶在除磷过程中起着重要作用，在侧流比为33.3%的情况下，结晶除磷量平均约占总除磷量的81.5%。TN的去除主要由缺氧池承担，厌氧池、硝化池、缺氧池、后置曝气池TN去除量约占系统TN去除总量的31.7%、11.4%、54.9%和2.0%。后置曝气池对超越污泥中COD和氨氮的去除有重要作用。 关键词：反硝化除磷；双污泥；结晶；脱氮除磷 Nitrogen and Phosphorus Removal in a Continuous-Flow Two-Sludge and Induced Crystallization Process Shi Jing , LU Xi-wu (School of Energy Environment, Southeast University, Nanjing 210096, China) Abstract: To solve the problems of traditional nitrogen and phosphorus removal processes, like lack of carbon source, SRT contradictions and low efficiency of phosphorus reuse and recovery, a two-sludge and induced crystallization process was invented. Based on a lab-scale experiment, the characteristics of phosphorus, nitrogen and organic matter removal in the process were studied. The results indicated that under the condition of influence COD, TN, TP and C/N were 152～237mg?L-1, 3.92～7.68mg?L-1, 31.3～50.5mg?L-1 and 3.91～5.21, the average removal efficiencies of COD, TN, TP were 93.2%, 71.2% and 95.7% respectively. The removed COD amount in the anaerobic reactor was about 85.9% of the total removed COD amount. The induced crystallization reactor played a key role in phosphorus removal. About 81.5% of the total removed phosphorus was taken up by crystallization. The proportion of the TN removal amount for the anaerobic reactor, aerobic reactor, anoxic reactor and post-aeration reactor were 31.7%, 11.4%, 54.9% and 2.0% respectively, and the anoxic reactor took the most. The post-aeration reactor undertook th