[1]钟妮倩,李一平,周玉璇,等.典型丘陵地区污水系统运行效能评估与碳源损失解析[J].中国给水排水,2024,40(17):1-8.
　ZHONGNi-qian,LIYi-pingAN,ZHOUYu-xuan,et al.Evaluation of Operation Efficiency and Quantitative Analysis of Carbon Sources Loss in Sewage Systems in Typical Hilly Area[J].China Water & Wastewater,2024,40(17):1-8.
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典型丘陵地区污水系统运行效能评估与碳源损失解析

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第17期 页码: 1-8 栏目: 出版日期: 2024-09-01
Title:
Evaluation of Operation Efficiency and Quantitative Analysis of Carbon Sources Loss in Sewage Systems in Typical Hilly Area
作者:
钟妮倩1， 李一平1， 周玉璇1， 潘泓哲1， 杨紫瑄1， 赵思索1， 胡琳2， 尤爱菊2
（1.河海大学 环境学院，江苏 南京 210098；2.浙江省水利河口研究院<浙江省海洋规划设计研究院>，浙江 杭州 310020）
Author(s):
ZHONG　Ni-qian1， LI　Yi-pingAN1， ZHOU　Yu-xuan1， PAN　Hong-zhe1， YG　Zi-xuan1， ZHAO　Si-suo1， HU　Lin2， YOU　Ai-ju2
（1. College of Environment， Hohai University， Nanjing 210098， China； 2. Zhejiang Institute of Hydraulics & Estuary ， Hangzhou 310020， China）
关键词:
丘陵地区;  污水系统;  外水入流入渗;  碳源损失;  提质增效
Keywords:
hilly area;  sewage system;  external water inflow and infiltration;  carbon sources loss;  quality and efficiency improvement
摘要:
外水入侵稀释、污染物物理沉降与生化降解是污水系统输送沿程碳源损失的关键原因。以华东城市典型丘陵地区分流制污水系统为例，开展源头排水户-污水管网-提升泵站水量和水质同步监测，探究管网水力特性及水质变化响应，诊断系统运行问题，量化沿程物理稀释与沉降/降解比例。结果表明，系统实测污水量为理论值的1.93倍，外水入侵严重，地块出水至泵站进水碳源衰减比例（以COD计）为32.6%。上下游排水分区运行特征存在显著差异，其中上游管段接近满管运行，部分管道出现压力流，68.6%的管网流速<0.30 m/s，COD/氨氮低于下游；下游平均充满度为0.57，COD/氨氮逐渐降低。因丘陵地势复杂，上游管网坡度符合设计标准但落差大，排水不畅，导致高水位和颗粒物沉降；下游地势低，外水入渗稀释污染物。典型低水量低负荷效能区碳源损失机制以沉降/降解为主，占74.67%；高水量高负荷效能区以外水稀释为主，占94.24%。
Abstract:
The dilution by infiltration of external water and the deposition and degradation of pollutants are the key reasons for the loss of carbon sources in sewage systems. Taking a separate sewage system in the East China hilly area as an example, the simultaneous monitoring of water quantity and quality in the source drainage households, sewage pipe network and pump station was carried out. The study aimed to explore the hydraulic characteristics and response of water quality changes in the pipeline network, diagnose operational issues in the system and quantify the proportion of physical dilution, settling and degradation along the process. The results showed that the measured sewage volume of the system was 1.93 times of the theoretical value, indicating severe external water infiltration. The proportion of carbon source attenuation (measured by COD) from the discharged water to the pump station was 32.6%. Significant differences were observed in the operational characteristics of the upper and lower drainage zones. The upper pipeline was running close to full capacity, with some pipelines experiencing pressure flow, 68.6% of the network flow velocity was lower than 0.30 m/s and COD/NH3-N was lower than the downstream. In the downstream area, the average filling degree was 0.57 and COD/ NH3-N gradually decreased. Due to the complex terrain in the hilly area, the slope of the upper pipeline met the design standards but had a large drop, leading to poor drainage, high water levels and particle settling. In the downstream area with lower terrain, external water infiltration diluted pollutants. The carbon source loss mechanism in the typical low water volume and low load efficiency zone was mainly dominated by deposition and degradation, accounting for 74.67%, while in the high water volume high load efficiency zone, external water dilution was the main mechanism, accounting for 94.24%.

相似文献/References:

[1]刘云帆,栗玉鸿,孔烨,等.基于清污分流的丘陵地区城镇污水提质增效方法与实践[J].中国给水排水,2021,37(8):107.
　LIU Yun-fan,LI Yu-hong,KONG Ye,et al.Methods and Practices of Quality and Efficiency Improvement of Municipal Wastewater Treatment in Hilly Areas Based on Water-sewage Diversion[J].China Water & Wastewater,2021,37(17):107.

更新日期/Last Update: 2024-09-01