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国家级绿色低碳标杆厂探秘,南京桥北污水厂的极限脱氮与低碳运营实践

  • 2026-04-17 10:33:09
国家级绿色低碳标杆厂探秘,南京桥北污水厂的极限脱氮与低碳运营实践

一、为什么“污水厂们”,都去参观南京桥北厂?

2024年底,国家发展改革委、住房城乡建设部联合公布了全国首批45座"污水处理绿色低碳标杆厂"名单。在这份代表中国污水处理行业最高绿色水准的榜单中,南京桥北污水处理厂以"技术管理协同创新"类身份入围,成为南京市唯一上榜的污水处理设施。

对于水行业从业者而言,桥北厂的参观价值不仅在于其"国家级标杆"的头衔,更在于它成功破解了三个行业共性难题:高标准出水稳定达标高比例再生水回用污泥资源化与减量化协同这座位于长江之滨的地上式污水处理厂,正在重新定义"城市污水厂"的角色——从单一的污染物削减单元,演变为集水质净化、水资源循环、能源自给、生态服务于一体的城市绿色基础设施。

图:近期培训行程 / 标杆厂参观安排

二、工艺技术解码:如何实现TN<5mg/L的极限脱氮?

2.1 核心工艺路线

桥北厂二期扩建工程采用"改良AAO生化池 + MBR膜池/二沉池 + 高效混凝沉淀池 + Denifor V反硝化深床滤池"的组合工艺。其中,深度处理段的苏伊士Denifor V滤池是确保出水总氮稳定在5mg/L以下的关键技术单元。

该滤池系统共建8座,单池过滤面积116m²,设计滤速5-10m/h,具备"过滤+反硝化"双重功能:

  • 生物脱氮:陶粒滤料表面附着反硝化菌,在缺氧条件下利用外加碳源(乙酸钠)将硝酸盐氮还原为氮气

  • 物理截留:同步截留SS及化学除磷产生的沉淀物

  • 智能控制:全自动运行,精确控制碳源投加量(乙酸钠/去除TN质量比低于5),实现"无人值守"

在2020年7月的性能测试中,系统展现出卓越稳定性:进水TN 10mg/L条件下,出水TN稳定在2-5mg/L,TP降至0.05mg/L,显著优于设计指标。

2.2 工艺设计获奖

该扩建工程的设计方案荣获2022年度江苏省第二十届优秀工程设计一等奖,体现了工艺路线在工程化落地层面的高度成熟性,对于面临准四类提标压力的同类污水厂具有直接参考价值。

三、绿色低碳实践:五个维度的系统性创新

3.1 "厂网河湖"一体化运营模式

桥北厂最大的管理创新在于打破了"厂-网-河"分段管理的壁垒,建立起从污水收集管网到河道生态补水的全链条协同机制。这种模式不仅优化了调度效率,更通过管网液位智能调控降低了提升能耗,解决了传统模式下"厂网协同弱"的行业痛点。

3.2 再生水超80%资源化利用率

每日约20万吨的再生水被梯级利用:

  • 生态补水:约10万吨/日进入杏湖公园(原为电厂贮灰场改造的湿地公园),6万吨/日补充吨粮河、中心河、引水河

  • 工业回用:作为华能南京电厂冷却水补水

  • 厂内自用:生产用水(药剂配制、设备冲洗、绿化景观)几乎100%使用中水,大幅降低自来水依赖

3.3 BARMS污泥减量化技术

针对污泥处置的减碳需求,桥北厂研发应用了BARMS(Biofilm Activated Sludge with Micro-carriers System)工艺:

  • 源头减量:向生化池投加微球载体,优化微生物群落结构,减少剩余污泥产率

  • 脱水干化:采用螺旋浓缩+压榨干化技术,将泥饼含水率控制在60%以下

  • 能源化利用:干污泥送至秦源热电厂与煤掺烧发电,实现"污泥-能源"的负碳循环

3.4 "光伏+"替碳技术

厂区内污水处理构筑物上方安装了3.87兆瓦分布式光伏板。在晴朗白天,光伏发电量可基本覆盖全厂生产用电,实现了"污水厂能源自给"的突破性尝试。

3.5 全流程精细化节碳

从设备选型(进口高效鼓风机、水泵)到运行调控(基于AvN多模式ASAO低碳工艺研究),桥北厂建立了覆盖预处理、生化处理、污泥处理全流程的碳足迹管理体系。

四、行业启示:标杆厂的可复制经验

桥北污水处理厂的成功并非依赖某项"黑科技",而是系统性优化的典范

4.1 提标改造路径清晰

从一级A到准四类,通过"高效沉淀+反硝化滤池"的经典组合,以合理投资实现极限脱氮,为太湖流域等敏感地区污水厂提供了经济可行的技术模板。

4.2 资源循环闭环构建

将"负担"(尾水、污泥)转化为"资源"(生态补水水源、替代燃料),通过商业模式创新(与电厂、公园管理方的合作)实现环境效益与经济效益双赢。

4.3 运营理念升级

从"达标排放"转向"厂网河湖系统最优",这种思维的转变比技术本身更具推广价值。

作为入选国家首批名单的标杆厂,南京桥北污水厂有太多值得“污水厂们”考察学习的地方了,而《环保水圈》也多次组织爱学习的“污水厂们”去参观学习,这个行程对于正在规划提标改造、探索低碳运营、或寻求商业模式突破的水务同仁而言,这里无疑是一个值得列入考察行程的"必选项"。

这不,水圈环保学院重磅打造的第十四期废水生化工艺控制实战培训班,就特别安排了全体学员实地考察南京桥北污水厂近距离学习先进的工艺、运行经验。

这期培训班自预告发布后,便吸引了众多水务水厂、污废水工程师的关注,报名席位持续火热!这期班已确定将于2周后开班,目前报名进度已过大半,已经有数十家环保运营公司、水务集团、污水厂技术团队预约报名。

聚焦生化工艺全流程控制与实战能力提升,这正是水圈学院开办本期培训班的核心所在。在这个课堂里,我们着重设计了三大核心板块:

①水解 / 厌氧段 + 除磷脱氮工艺(理论+案例);

②好氧段 + 生化与达标控制(实操 + 攻坚);

实地出发,以标杆污水厂为例,交流工艺及成本控制分析;

我们希望通过这个从实战角度设计、落地形式丰富的生化工艺课题培训班,给环企、污水厂和工业企业带去实打实的技术启发和实操参考

如果您有兴趣了解具体课程内容、授课细节和报名方式,可以扫码联系课程老师,咨询报名、考证及优惠等相关事宜:

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  1. CONNECT:[ UseTime:0.000517s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000958s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000452s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000435s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000852s ]
  6. SELECT * FROM `set` [ RunTime:0.000370s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000934s ]
  8. SELECT * FROM `article` WHERE `id` = 533598 LIMIT 1 [ RunTime:0.001053s ]
  9. UPDATE `article` SET `lasttime` = 1776801378 WHERE `id` = 533598 [ RunTime:0.001612s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000426s ]
  11. SELECT * FROM `article` WHERE `id` < 533598 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000670s ]
  12. SELECT * FROM `article` WHERE `id` > 533598 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000709s ]
  13. SELECT * FROM `article` WHERE `id` < 533598 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002671s ]
  14. SELECT * FROM `article` WHERE `id` < 533598 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001500s ]
  15. SELECT * FROM `article` WHERE `id` < 533598 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001204s ]
0.091937s