CAOChen-jie,XUZhi-qiang,LONGYi-jing,et al.Effect of Flow Velocity on Algal Bloom in Landscape Water Replenished with Reclaimed Water[J].China Water & Wastewater,2023,39(17):65-69.
流速对再生水补水的景观水体藻类水华的影响
- Title:
- Effect of Flow Velocity on Algal Bloom in Landscape Water Replenished with Reclaimed Water
- Keywords:
- reclaimed water; landscape water body; flow velocity; algal bloom
- 摘要:
- 藻类水华一直是制约再生水景观水体利用的瓶颈，改善水动力条件是控制藻类生长的有效方法之一。在识别出典型再生水补水水体优势藻种类别（水华微囊藻、普通小球藻、四尾栅藻）基础上，分析流速（0、0.05、0.1、0.2 m/s）对模拟配水和实际再生水中3 种优势藻种生长状况的影响。结果表明，当流速为0~0.05 m/s时，表现为促进藻类生长，优势流速为0.05 m/s；当流速≥0.1 m/s时，表现为抑制藻类生长，3种优势藻种的藻密度在10 d内可下降80%以上，叶绿素a（Chl-a）浓度从180~200 mg/m3左右均降至35 mg/m3以下；当流速增加至0.2 m/s时，水体中的藻密度和Chl-a浓度在第9天便无法检出。所以，水体流速控制在0.1 m/s以上时，可以有效控制以再生水补水的水体中水华的发生。
- Abstract:
- Algal bloom has always been a bottleneck restricting the application of reclaimed water in landscape water, and improving hydrodynamic conditions is one of the effective methods to control algal growth. Based on the identification of dominant algal species (Microcystis aquatica, Chlorella vulgaris and Tetraodontophora) in a typical water body replenished with reclaimed water, this paper analyzed the effects of flow velocity (0, 0.05 m/s, 0.1 m/s, 0.2 m/s) on the growth of the three dominant algal species in simulated water and actual reclaimed water. When the flow velocity was in the range of 0-0.05 m/s, the algal growth was promoted, and the dominant flow velocity was 0.05 m/s. When the flow velocity was no less than 0.1 m/s, the growth of algae was inhibited, the algal density of the three dominant algal species decreased by more than 80% within 10 days, and the concentrations of chlorophyll a (Chl-a) decreased from approximately 180-200 mg/m3 to below 35 mg/m3. When the flow velocity was increased to 0.2 m/s, the algal density and Chl-a concentration in the water could not be detected on day 9. Therefore, the occurrence of algal bloom in the water body replenished with reclaimed water could be effectively controlled when the water flow velocity was controlled above 0.1 m/s.
相似文献/References:
[1]王文怀,王怡,韦存智,等.水绵强化浮床净化再生水补给的景观水体效果[J].中国给水排水,2018,34(21):59.
WANG Wen huai,WANG Yi,WEI Cun zhi,et al.Effect of Enhanced Spirogyra Floating Bed on Purification of Landscape Water Supplied with Reclaimed Water[J].China Water & Wastewater,2018,34(17):59.
[2]王金龙.再生水厂UF-RO双膜工艺的设计探讨及优化改进[J].中国给水排水,2020,36(24):120.
WANG Jin-long.Discussion and Improvement on Design of UF and RO Process in a Water Reclamation Plant[J].China Water & Wastewater,2020,36(17):120.
[3]李智,王怡,王文怀.不同水源补给对景观水体水质及浮游动物的影响[J].中国给水排水,2021,37(5):91.
LI Zhi,WANG Yi,WANG Wen-huai.Effects of Different Water Sources Supply on Water Quality and Zooplankton in Landscape Waters[J].China Water & Wastewater,2021,37(17):91.
[4]胡爱兵,杨少平,任心欣.深圳市再生水工作回顾与展望[J].中国给水排水,2021,37(8):18.
HU Ai-bing,YANG Shao-ping,REN Xin-xin.Review and Prospect of the Related Works on Reclaimed Water in Shenzhen[J].China Water & Wastewater,2021,37(17):18.
[5]陈卓,郝姝然,高强,等.《再生水利用效益评价指南》标准解读[J].中国给水排水,2021,37(18):1.
CHEN Zhuo,HAO Shu-ran,GAO Qiang,et al.Interpretation of an Association Standard of Guideline for Benefit Evaluation of Reclaimed Water Use[J].China Water & Wastewater,2021,37(17):1.
[6]刘晓军.烟台市套子湾污水厂双膜法再生水工程设计[J].中国给水排水,2022,38(10):79.
LIUXiao-jun.Design of Double Membrane Reclaimed Water Project of Yantai Taoziwan Wastewater Treatment Plant[J].China Water & Wastewater,2022,38(17):79.
[7]韩雪宜,王怡,王文怀,等.植物碳源强化浮床净化效果及对根系微生物群落影响[J].中国给水排水,2023,39(3):9.
HANXue-yi,WANGYi,WANGWen-huai,et al.Purification Efficiency and Effect on Plant Roots Microbial Community of Enhanced Floating Bed with Plant Carbon Source[J].China Water & Wastewater,2023,39(17):9.
[8]王刚,李魁晓,王慰,等.磷元素形态及悬浮物含量对再生水磷浓度的影响[J].中国给水排水,2023,39(11):109.
WANGGang,LIKui-xiao,WANGWei,et al.Effects of Phosphorus Form and Suspended Solids Content on Phosphorus Concentration in Reclaimed Water[J].China Water & Wastewater,2023,39(17):109.
[9]王志斌.《建筑给水排水与节水通用规范》问题分析与探讨[J].中国给水排水,2023,39(20):93.
WANGZhi-bin.Analysis and Discussion on the Issues of General Code for Design of Building Water Supply and Drainage and Water Saving[J].China Water & Wastewater,2023,39(17):93.