REGULATION OF HYDRAULIC RETENTION TIME THRESHOLD OF RECLAIMED WATER LANDSCAPE FOR BLOOM CONTROL

SONG Keying; SUN Ruize; DAO Guohua; LU Yun; WU Yinhu; CHEN Zhuo; HU Hongying

doi:10.13205/j.hjgc.202301023

Volume 41 Issue 1

Jan. 2023

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SONG Keying, SUN Ruize, DAO Guohua, LU Yun, WU Yinhu, CHEN Zhuo, HU Hongying. REGULATION OF HYDRAULIC RETENTION TIME THRESHOLD OF RECLAIMED WATER LANDSCAPE FOR BLOOM CONTROL[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 189-194. doi: 10.13205/j.hjgc.202301023

Citation:

SONG Keying, SUN Ruize, DAO Guohua, LU Yun, WU Yinhu, CHEN Zhuo, HU Hongying. REGULATION OF HYDRAULIC RETENTION TIME THRESHOLD OF RECLAIMED WATER LANDSCAPE FOR BLOOM CONTROL[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 189-194. doi: 10.13205/j.hjgc.202301023

Citation:

SONG Keying, SUN Ruize, DAO Guohua, LU Yun, WU Yinhu, CHEN Zhuo, HU Hongying. REGULATION OF HYDRAULIC RETENTION TIME THRESHOLD OF RECLAIMED WATER LANDSCAPE FOR BLOOM CONTROL[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 189-194. doi: 10.13205/j.hjgc.202301023

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REGULATION OF HYDRAULIC RETENTION TIME THRESHOLD OF RECLAIMED WATER LANDSCAPE FOR BLOOM CONTROL

doi: 10.13205/j.hjgc.202301023

SONG Keying^1,2,
SUN Ruize^1,2,
DAO Guohua³,
LU Yun^1,2,
WU Yinhu^1,2,
CHEN Zhuo^1,2,
HU Hongying^{1,4
,
,}

1. Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China;
2. Beijing Laboratory for Environmental Frontier Technologies, Beijing 100084, China;
3. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
4. Research Institute for Environmental Innovation (Suzhou), Tsinghua University, Suzhou 215163, China

Received Date: 2021-12-25
Available Online: 2023-03-23

Abstract

Abstract

Utilization of reclaimed water landscape is one of the effective ways to solve the shortage of urban landscape water. However, reclaimed water with a high concentration of nitrogen and phosphorus enters the landscape water with poor mobility, which is prone to water bloom. Under the existing reclaimed water discharge standard, the regulation of hydraulic retention time is an effective means to control microalgae biomass in landscape water. In this study, based on the microalgae growth model and the water quality dynamical model, a method for controlling the water bloom of landscape water and its threshold determination based on regulation of hydraulic retention time were proposed. Through calculation, the threshold value of hydraulic retention time corresponding to the national standard GB 18918-2002 (TN=15 mg/L, TP=0.5 mg/L) was 2.477 d; corresponding to the discharge standard (DB11/800-2012) level A (TN=10 mg/L, TP=0.2 mg/L) of water pollutants for urban sewage treatment plants in Beijing was 5.033 d; corresponding to the discharge standard (DB5301/T43-2020) level A of Kunming sewage treatment plants (TN=5 mg/L, TP=0.05 mg/L) was 21.655 d; corresponding to the discharge standard (DB5301/T43-2020) level B of Kunming sewage treatment plants (TN=10 mg/L, TP=0.3 mg/L) was 3.783 d; corresponding to the discharge standard (DB5301/T43-2020) level C of Kunming sewage treatment plants (TN=15 mg/L, TP=0.4 mg/L) was 2.811 d; corresponding to the standard of EU urban sewage treatment (91/271/ZEC) (TN=15 mg/L, TP=2 mg/L) was 1.475 d. If the hydraulic retention time of the landscape water body is less than the corresponding threshold, the water blooms in the landscape water body can be effectively controlled.
- reclaimed water,
- bloom control,
- hydraulic retention time,
- threshold,
- mixed algae

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References(25)

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