双沟镇A2O-MBR设计方案.doc
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1、【精品文档】如有侵权,请联系网站删除,仅供学习与交流双沟镇A2O-MBR设计方案.精品文档.毕 业 设 计(论 文)双沟镇污水处理工程初步设计专业年级 06级给水排水工程 学 号 06142207 姓 名 潘 兴 华 指导老师 操 家 顺 评阅老师 二一年六月中国 南京摘要随着社会的发展,国家对城市污水排放的要求越来越高。为改善双沟镇的水体环境,使双沟镇的污水能够得到全面的收集和完善的处理,拟建设一污水处理厂,设计中污水厂服务的人口为近期5万人,远期11万人。设计管网服务的面积为1712.13公顷,工程总造价为10950.15万元。排水管网设计时,根据城镇的地形趋势,将整个城镇划分成了四个排水
2、区域,然后通过提升泵站将各区的污水提升至污水处理厂。污水厂设计规模为:近期2万吨/d,远期6万吨/d。设计进水水质为:悬浮物(SS):239mg/L;五日生化需氧量(BOD5):317mg/L;化学需氧量(CODcr):221mg/L;总氮(TN):32mg/L;总磷(TP):4mg/L;氨氮(NH3-N):30mg/L。设计出水标准达到城镇污水处理厂污染物排放标准(GB18918-2002)一级A标准,即:悬浮物(SS)10mg/L;五日生化需氧量(BOD5)10mg/L;化学需氧量(CODcr)50mg/L;总氮(TN)15mg/L;总磷(TP)0.5mg/L;氨氮(NH3-N)5mg/L
3、。为达到出水标准,本设计采用A2/O-MBR工艺处理双沟镇的污水。与传统活性污泥工艺相比,MBR对含碳有机物的去除有以下特点:去除率高,一般大于90%,出水达到回用水的指标;污泥负荷(F/M)低;所需水利停留时间(HRT)短,容积负荷高,刚冲击负荷能力强。而膜生物反应器用膜组件替代了传统的二沉池进行固液分离,由于膜的高截留率并将浓缩污泥回流到生物反应器内,而使生物反应器内具有很高的微生物浓度和很长的污泥停留时间,所以MBR法可以在比传统活性污泥法更短的水力停留时间内达到更好的去除效率。本设计的理念是利用MBR膜池代替传统工艺中的二沉池,在A2/O生物池对污水进行脱氮除磷的基础上,膜池达到进一步
4、深度处理的效果。为解决出水中总磷的含量不太稳定的问题,在膜池的进水端进行加药除磷。设计中主要构筑物包括粗格栅、提升泵房、细格栅、旋流式沉砂池、A2/O生物池、MBR膜池、接触消毒池、贮泥池、脱水机房等。市政污水管网收集的污水经中格栅拦截较大的悬浮物和漂浮物后,由污水泵房提升至细格栅和旋流式沉砂池去除比重较大的无机颗粒,在经过生物池脱氮除磷后再通过膜池对污水中剩余的有机物质及氮磷进一步降解去除,处理后的污水经氯消毒后排放。在整个处理工程中,污泥回流比为100%,其余的由污泥脱水机房浓缩脱水后外运。在该处理工艺下,最终排放的污水达到国家一级A标准,符合设计要求。 关键词:污水处理,A2/O-MBR
5、工艺,一级A标准ABSTRACTWith the development of our society, the standard of the urban sewage discharge that the state requires are higher and high. To improve the environment shuanggou town s water , collect this water comprehensively and deal with it comprehensively,the state plans to build a sewage treat
6、ment plant.In this design the wastewater treatment plant services a population of 5 million people recently and 11 million long-term . The pipe network services 1,712.13 hectares and the total cost of the project is 109.5015 million dorall. During the design of the pipe network, we divide the entire
7、 town into four drainage areas according to the urban terrain, and then upgrade the sewage to the sewage treatment plant by pump.The design scale of this wastewater treatment plant is 20,000 tons / d for recent and 60,000 tons / d for long-term. Design quality of enter water are: suspended solids (S
8、S): 239mg / L; the oxygen demand for biochemistry in the 5 days (BOD5): 317mg / L; oxygen demand for biochemistry in the 5 days (BOD5): 317mg / L; oxygen demand for chemistry (CODcr): 221mg / L; total nitrogen contents (TN): 32mg / L; total phosphorus contents (TP): 4.0mg / L; ammonia nitrogen conte
9、nts (NH3-N): 30mg / L. The designed effluent standards can achieve to grade A standards ,which comes from Municipal Wastewater Treatment Plants Emission Standards of Pollutant (GB18918-2002).Namely: suspended solids (SS) 10mg / L; the oxygen demand for biochemistry in the 5 days(BOD5) 10mg / L; oxyg
10、en demand for chemistry (CODcr) 50mg / L; total nitrogen contents (TN) 15mg / L; total phosphorus contents (TP) 0.5mg / L; ammonia nitrogen contents (NH3-N) 5mg / L.To achieve the effluent standards, the design uses A2/O-MBR Process to treat the urban sewage water of shuanggou . Compared with conven
11、tional activated sludge process, MBR process has the following characteristics on the removal of organic carbon :Removal rate is high that can be generally greater than 90% and the effluent water can reach the target of reuse water; sludge loading (F / M) is low; hydraulic retention time (HRT) that
12、required is short. Whats more, it has high-volume load and strong capability of shock load. Membrane Biological Reactor replaces the traditional secondary separation of solid with membrane in order to separate solid and liquid. As the film has high retention rate and it can return the concentrated s
13、ludge back to the bioreactor so that the bioreactor can have microorganism with high concentration and a long sludge retention time. Compared with conventional activated sludge process the MBR process can achieve better removal efficiency with shorter hydraulic retention time. The concept of this de
14、sign is replacing the secondary settling tank in the traditional process with MBR membrane pool. On the basis of the A2 / O biological sewage pools removal for nitrogen and phosphorus, membrane pool has the further treatment function. To solve the problem that the content of total phosphorus in effl
15、uent is not stable, we add specific pharmaceutical to the intake department of membrane pool for removing phosphorus.The main structures of the treatment process include medium bar screen, sewage pumping station, thin bar screen, Vortex-type grit chamber, A2 / O biological pool, MBR membrane pool, C
16、hlorine concentration tank, Storage basins ,sludge dehydration shop etc. In preliminary treatment, the original water enters medium screening in order to remove heavy solids and floatable materials, in case that it influences the working of the following devices and the pipelines. Then it enters vor
17、tex-type grit chamber, which is used to remove bigger inorganic sand of heavy density after the wastewater is pumped into the thin screening. Afrer this the wastewater goes to the A2 / O biological pool for organics, nitrogen and phosphorus removal .Then the wastewater goes to MBR membrane pool for
18、the remaining organic matter , nitrogen and phosphorus to treat deeply. At last the wastewater enters Chlorine concentration tank and is discharged.100% of sludge are recycled to the oxidation ditch and the rest are pumped to sludge dehydration shop to discharge after thickening and dehydration.Unde
19、r this process for wastewater treatment, the effluent standards can reach grade A. Keywords: Sewage treatment, A2/O-MBR process,Grade A standards目录第一篇 概述31概述31.1设计任务31.2设计依据31.3 区域概况31.4自然条件31.5给排水现状和规划31.6工程建设的必要性和工程内容3第二章 说明书31 排水体制确定32排水管网设计32.1污水管网布置原则32.2设计依据32.3污水管网系统方案32.4污水管网水力计算方法32.5管网工程量3
20、3污水处理厂设计33.1设计规模及处理程度的确定33.2污水处理厂的工艺选择33.3污水处理厂的工艺设计33.4污水处理厂厂区设计34.工程概算与成本分析34.1 工程概况及编制依据34.2 造价估算35环境保护,安全生产和编制管理35.1环境保护35.2 安全生产和消防措施35.3 编制管理36 工程效益分析36.1环境效益36.2 社会经济效益37 存在问题与建议37.1 存在问题37.2 建议3第三章 设计计算书31处理规模、处理程度、管网设计计算31.1 污水处理规模的计算31.2工业废水量计算31.3污水厂设计规模的确定31.4污水处理程度的计算31.5排水管网的水力计算32 污水处
21、理构筑物设计计算32.1泵前中格栅32.2污水提升泵房32.3泵后细格栅32.4沉砂池32.5配水井32.6生物池设计计算32.7 MBR膜池32.8接触消毒池与加氯间32.9 加药除磷的计算33 污泥处理构筑物设计计算33.1回流污泥和剩余污泥33.2.污泥贮泥池33.3脱水机房34 高程计算34.1 污水处理构筑物高程布置34.2污水处理构筑物高程布置3第五章 英语论文翻译3英文:3中文翻译:3第六章 小论文(A2/O-MBR工艺处理城市污水)36.1 A2/O系统36.2膜生物反应器(MBR)36.3设计工艺及问题3第一篇 概述1概述1.1设计任务根据双沟镇总体规划及相关资料进行城市污水
22、处理工程设计,具体内容有:(1).污水收集管网系统设计(2).污水处理工艺设计(3).污水处理构筑物设计(4).污泥处理构筑物设计1.2设计依据(1)室外排水设计规范(GB500142006); (2)投资估算指标(第二册,排水工程)中国建筑工业出版社; (3)建筑制图标准汇编中国建筑工业出版社,1996; 1.3 区域概况双沟镇中心地理坐标为东经1181838,北纬331338。镇域面积86平方公里,人口5.10万,辖9个行政村、8个居委会和1个小农场,可耕地面积4.2万亩。近年来,双沟镇在上级党政组织的正确领导下,坚持“工业突破、城镇带动、创业富民、维护稳定”的发展思路,立足镇情,突出重点
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