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1 Energy Saving Concepts for WWTPs 污水处理厂的能源消耗环节曝气系统的节能潜力案例解析 : 美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂 Energy consumers at WWTPs potential for energy savings of aeration systems case study, WWTP Jackson Pike, Columbus, Ohio, USA

2 introduction Wastewater Treatment Plant 污水处理厂 consumers of electrical power in wwtps 污水处理厂的能源消耗环节 Sewage network Mechanical treatment Biological treatment 污水管网物理处理生物处理 sewer screen grit & grease primary clarifier aeration tank clarifier membrane 污水管道格栅 removal 初沉池曝气池二沉池沉砂池污泥浓缩 sludge thickener 消化 digester gas tank 气罐 post thickener CHP 发电机组 dewatering 其他污泥焚烧 sludge incineration 污水处理厂能量消耗总计污泥调理脱水 Sludge treatment 污泥处置 Incineration 焚烧

introduction Wastewater Treatment Plant 污水处理厂 consumers of electrical power in wwtps 污水处理厂的能源消耗环节 Mechanical treatment Biological treatment 物理处理生物处理 sewer screen grit & grease primary clarifier

3 introduction Wastewater Treatment Plant 污水处理厂 consumers of electrical power in wwtps 污水处理厂的能源消耗环节 Mechanical treatment Biological treatment 物理处理生物处理 sewer screen grit & grease primary clarifier aeration tank clarifier membrane 污水管道格栅 removal 初沉池曝气池二沉池沉砂池污泥浓缩 sludge thickener 消化 digester gas tank 气罐 post thickener CHP 发电机组 dewatering 污泥焚烧 sludge incineration 污水处理厂能量消耗总计污泥调理脱水 Sludge treatment 污泥处置 Incineration 焚烧

4 introduction 节能潜力污水处理厂的能源消耗环节 potential for energy savings: consumers of electrical power in wwtps 生物处理过滤污泥处理基础设施建设污水泵机械处理 Example: wwtp of 100,000 P.E. Handbuch: Energie in Kläranlagen, Nordrhein-Westfalen

5 power production Wastewater Treatment Plant 污水处理厂 consumers of electrical power in wwtps 污水处理厂的能源消耗环节 Sewage network Mechanical treatment Biological treatment 污水管网物理处理生物处理 sewer screen grit & grease primary clarifier aeration tank clarifier membrane 污水管道格栅 removal 初沉池曝气池二沉池沉砂池污泥浓缩 sludge thickener 消化 digester gas tank 气罐 post thickener CHP 发电机组 dewatering 污泥焚烧 sludge incineration 电能 electric energy 污泥调理脱水 Sludge treatment 污泥处置 Incineration 焚烧

6 power production 总能量流入 influent WWTP 153 Energy flows in an aerobic WWTP (ASP) values in kwh/(c a) 活性污泥法污水处理厂能量平衡图单位 ( kwh/(c a) ) 流出污水处理厂流入曝气池 influent aeration tank 117 pimary sludge HRT PS =1h 36 混合污泥 mixed sludge effluent WWTP 初沉污泥 mineralized to CO 带硝化及前置反硝化 ASP with nitrification and pre-denitrification, SRT=13 d T=12 C 74 泥龄 :13 天温度 :12 C 剩余污泥 excess sludge 38 CO 2 排放污水处理厂能量消耗总计 total power consumption WWTP 曝气 aeration 其他 others sludge treatment 污泥处理消化产生的热能 digester heating 33 沼气 biogas 20 > 60% 13 < 40% 外部能源供给 external power supply 电能 electric energy 13 stabilized sludge 污泥稳定 33 sludge digestion 污泥消化 Institute IWAR Prof. Dr.-Ing. Martin Wagner TPS 发电机组 7 废热 wasteheat

7 power production appr. 55 % of the waste water s chemically bound energy ends up in the raw sludge 约 55% 的污水处理过程中释放的化学键合能被贮存于生污泥之中 appr. 25 % stays in the digested sludge 还有约 25% 的剩余能量被贮藏在消化污泥中 less than 10 % can be used as electrical energy (after subtraction of the own needs for the operation of the sludge dewatering) 只有少于 10% 的能量可以被转化为电能 ( 已刨除污泥脱水时所需能量 )

8 power production Increase of the electrical efficiency when converting biogas into electricity: 由沼气转换为电能的时候增加电力效率 CHPs: 26 % up to 39 % 热电联产设备 :26% 提高到 39% Fuel cells: up to 50 % expected 燃料电池 : 预计高达 50% Increase of the biogas production 沼气增产 Retention time in the digestion >> 20 d 消化作用停留时间大于 20 天, mixing 搅拌, Temperature between 37 and 39 C 温度保持在 37 至 39 C 之间 Addition of enzymes 加酶 Disintegration 分解 Utilization of spare capacities in digesters by co-digestion 在厌氧消化过程中利用消化池的备用容积

9 power saving Sewage network Wastewater Treatment Plant 污水处理厂 Mechanical treatment Biological treatment 污水管网物理处理生物处理 sewer screen grit & grease primary clarifier aeration tank clarifier membrane 污水管道格栅 removal 初沉池曝气池二沉池沉砂池污泥浓缩 sludge thickener 消化 digester gas tank 气罐 post thickener CHP 发电机组 dewatering 污泥焚烧 sludge incineration 污泥调理脱水 Sludge treatment 污泥处置 Incineration 焚烧

10 power saving 节能潜力污水处理厂的能源消耗环节 potential for energy savings: consumers of electrical power in wwtps 生物处理过滤污泥处理基础设施建设污水泵机械处理 Example: wwtp of 100,000 P.E. Handbuch: Energie in Kläranlagen, Nordrhein-Westfalen

11 power saving potential for energy savings: 节能潜力生物处理阶段曝气搅拌回流泵 Example: wwtp of 100,000 P.E.

12 power saving 活性污泥法污水处理厂生物处理过程中 40%-80% 的电耗产生于曝气系统 40% - 80% of the electrical power consumption of a biological WWTP are on the expense of the aeration system. mpcb.gov.in/ photogallery/17tbia.php

13 power saving 因此曝气系统被视为当前污水处理厂最具节能潜力的环节 Consequently the aeration system contains by far the highest potential for energy savings. mpcb.gov.in/ photogallery/17tbia.php

14 power saving Aeration System 曝气系统 Blower 鼓风机如何降低能耗? How to reduce energy consumption? Diffusers 曝气管

15 power saving Aeration System 曝气系统 Blower 鼓风机 The purpose of the Aeration System is to provide oxygen to the process 曝气系统的作用在于为该过程提供氧气 The need air flow rate determines the Energy uptake of the blowers 所需的气流量决定了鼓风机的能耗 COD, TKN and the process define the oxygen requiremnt AOR 化学需氧量 COD, 凯氏氮和处理工艺决定了曝气池的实际需氧量 AOR Diffusers Diffusers dertmine the air flow rate needed for to achieve the required AOR. 曝气管曝气管决定了为提供实际需氧量所需的气流量

16 power saving 100% 高效率曝气管 20% 至 50% 鼓风机高效鼓风机 10% AOR air flow rate energy 需氧量气流量能耗

17 power saving 如何降低能耗? Aeration System How to reduce energy consumption? 其次 : 采用先进的鼓风以达曝气管的要求 A modern blower that meets the needs of the diffuser system 首先 : 采用高效曝气管, 以更低的气流量提供实际需氧量 High Efficiency Diffusers that meet the oxygen requirements of the process with a low air flow rate Precise Air Distribution

Case Study 案例分析美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂由 102MGD 扩建至 150MGD (16100 m³/h 至 24000 m³/h) Jackson Pike WWTP, Columbus Ohio, USA Extension of 102 MGD up to 150 MGD

18 Case Study 案例分析美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂由 102MGD 扩建至 150MGD (16100 m³/h 至 m³/h) Jackson Pike WWTP, Columbus Ohio, USA Extension of 102 MGD up to 150 MGD (16100 m³/h to m³/h) 处理厂归属 : 美国俄亥俄州哥伦布市 Plant Owner: City of Columbus, OH, USA 工程咨询方 : Consulting Engineers: 曝气系统设计以及供应商 : Design and supply of the aeration system:

Case Study Jackson Pike 污水处理厂 : 由 102MGD 扩建至 150MGD (16100 m³/h 至 24000 m³/h) 该设计中鼓风机效率增加 30% Jackson Pike WWTP: Extension of 102 MGD up to 150 MGD (16100 m³/h to 24000 m³/h)

19 Case Study Jackson Pike 污水处理厂 : 由 102MGD 扩建至 150MGD (16100 m³/h 至 m³/h) 该设计中鼓风机效率增加 30% Jackson Pike WWTP: Extension of 102 MGD up to 150 MGD (16100 m³/h to m³/h) planned with additional 30% blower capacity 原有系统 : 北美管式曝气管品牌, 配备 EPDM 膜片的常规微孔曝气头. former system: North American tube diffuser brand, Conventional fine pore diffuser with EPDM membranes.

Case Study 工程师采取更为经济的方案, 以达到 : 曝气效率扩增加 30%, 无需扩大鼓风机功率!

20 Case Study 工程师采取更为经济的方案, 以达到 : 曝气效率扩增加 30%, 无需扩大鼓风机功率! 通过安装高效曝气系统! 新建系统 : OTT HE 系统, 高效曝气装置, 特点是具有极高的氧气传递速率 The Engineers decided for the economic way to go: 30 % Extension without adding blower capacity! New diffuser system installed: OTT HE System, High efficiency aeration system, characterized by excessive oxygen transfer rates

21 Case Study 美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂 Jackson Pike WWTP, Columbus Ohio, USA 原有曝气系统 former aeration System (when new) 成果 : Achievements: OTT HE 系统 ( 新 ) OTT HE System (new) 标准氧气传递效率 SOTE: ~ 20 % or 5.3%/m SOTE: ~ 20 % or 5.3%/m 每日需氧量 Qair: ~ 3,620,000 Nm³/day Qair: ~ 3,620,000 Nm³/day 标准氧气传递效率 SOTE: ~ 34 % or 9%/m ( 净水测试 ) SOTE: ~ 34 % or 9%/m (tested in clean water) 每日需氧量 Qair: ~ 2,100,000 Nm³/day Qair: ~ 2,100,000 Nm³/day

Case Study 美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂 Jackson Pike WWTP, Columbus Ohio, USA 成果 : Achievements: 原有曝气系统 former aeration System (when new) 能耗 : ~ 27,840 MWh/year OTT HE 系统 ( 新 )

22 Case Study 美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂 Jackson Pike WWTP, Columbus Ohio, USA 成果 : Achievements: 原有曝气系统 former aeration System (when new) 能耗 : ~ 27,840 MWh/year OTT HE 系统 ( 新 ) OTT HE System (new) 能耗 : ~ 16,100 MWh/year Energy: ~ 27,840 MWh/year Energy Savings of 42% + no additional blower needed for extension Energy: ~ 16,100 MWh/year 节能 42%+ 无需外加鼓风机即可达到扩容

aeration system by an OTT HE System we achieved: reduction of

costs per year of about 1,140,000 US$ per year Costs of High

sum for the HE System: less than 3 years 通过以 OTT HE

23 Case Study 美国俄亥俄州哥伦布市 Jackson Pike 污水处理厂 Jackson Pike WWTP, Columbus Ohio, USA By replacing a conventional fine bubble aeration system by an OTT HE System we achieved: reduction of energy consumption of the blowers of about 42% reduction of energy costs per year of about 1,140,000 US$ per year Costs of High Efficiency aeration System: ~ 3,000,000 US$ return on the invested sum for the HE System: less than 3 years 通过以 OTT HE 系统替换原有常规微孔曝气系统, 我们得到以下成果 : 鼓风机能量消耗降低 42% 年度能源支出费用降低约美元高效曝气系统的成本 : 美元系统投资回收期限 : 不足 3 年

24 Summary Summary: 总结 : 曝气系统是活性污泥法污水处理厂中首要能耗环节曝气系统具有当前最大的节能潜力曝气系统能耗主要取决于曝气管的质量案例分析证实, 在仅更新曝气管的条件下, 节能 50% 就已成为可能 The aeration system is the energy consumer no. 1 in biological WWTPs. It provides by far the largest potential for energy savings. Its energy consumption is mainly dependends on the quality of the diffusers. Case studies have proven that energy savings up to 50% are possible.

25 Summary Recommendation: 推荐如果您注重节能请务必注重您的曝气管! IF YOU CARE FOR ENERGY SAVINGS CARE FOR YOUR DIFFUSERS!

26 感谢您的关注 THANK YOU

Microsoft PowerPoint - WatanabeTokyoGas.ppt

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