The Impact of Lake Water Quality on the Performance of Mature Artificial Recharge Ponds
Li, Jing LU ; Hägg, Kristofer LU
and Persson, Kenneth M
LU
(2019)
In Water
11(10).
- Abstract
- Artificial groundwater recharge is commonly used for drinking water supply. The resulting water quality is highly dependent on the raw water quality. In many cases, pre-treatment is required. Pre-treatment improves the drinking water quality, although how and to what extent it affects the subsequent pond water quality and infiltration process, is still unknown. We evaluated two treatment systems by applying different pre-treatment methods for raw water from a eutrophic and temperate lake. An artificial recharge pond was divided into two parts, where one received raw water, only filtered through a micro-screen with 500 µm pores (control treatment), while the other part received pre-treated lake water using chemical flocculation with... (More)
- Artificial groundwater recharge is commonly used for drinking water supply. The resulting water quality is highly dependent on the raw water quality. In many cases, pre-treatment is required. Pre-treatment improves the drinking water quality, although how and to what extent it affects the subsequent pond water quality and infiltration process, is still unknown. We evaluated two treatment systems by applying different pre-treatment methods for raw water from a eutrophic and temperate lake. An artificial recharge pond was divided into two parts, where one received raw water, only filtered through a micro-screen with 500 µm pores (control treatment), while the other part received pre-treated lake water using chemical flocculation with polyaluminium chloride (PACl) combined with sand filtration, i.e. continuous contact filtration (contact filter treatment). Water quality such as cyanobacterial biomass, microcystin-LR as well as organic matter and nutrients were measured in both treatment processes. We found cyanobacterial biomass and microcystin-LR level after the contact filter treatment was significantly different from the control treatment and also significantly different in the pond water. In addition, with contact filter treatment, total phosphorus (TP) and organic matter removal were significantly improved in the end water, TP was reduced by 96 % (< 20 µg/L) and the total organic carbon (TOC) was reduced by 66 % instead of 55 % (TOC content around 2.1 mg/L instead of 3.0 mg/L). This full-scale onsite experiment demonstrated effective pre-treatment would benefit a more stable water quality system, with less variance and lower cyanotoxin risk. In a broader drinking water management perspective, the presented method is promising to reduce cyanotoxin risk, as well as TP and TOC, which are all predicted to increase with global warming and extreme weather. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/0b38c7bf-b559-4e1f-a2f7-1c207af7455c
- author
- Li, Jing
LU
; Hägg, Kristofer
LU
and Persson, Kenneth M
LU
- contributor
- Hansson, L-A
LU
- organization
- publishing date
- 2019-09-24
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Water
- volume
- 11
- issue
- 10
- article number
- 1991
- pages
- 17 pages
- publisher
- MDPI AG
- external identifiers
-
- scopus:85073246864
- ISSN
- 2073-4441
- DOI
- 10.3390/w11101991
- project
- Managing Eutrophic Waters in Artificial Recharge Plants
- language
- English
- LU publication?
- yes
- id
- 0b38c7bf-b559-4e1f-a2f7-1c207af7455c
- date added to LUP
- 2019-09-24 15:13:36
- date last changed
- 2024-03-04 03:04:06
@article{0b38c7bf-b559-4e1f-a2f7-1c207af7455c,
abstract = {{Artificial groundwater recharge is commonly used for drinking water supply. The resulting water quality is highly dependent on the raw water quality. In many cases, pre-treatment is required. Pre-treatment improves the drinking water quality, although how and to what extent it affects the subsequent pond water quality and infiltration process, is still unknown. We evaluated two treatment systems by applying different pre-treatment methods for raw water from a eutrophic and temperate lake. An artificial recharge pond was divided into two parts, where one received raw water, only filtered through a micro-screen with 500 µm pores (control treatment), while the other part received pre-treated lake water using chemical flocculation with polyaluminium chloride (PACl) combined with sand filtration, i.e. continuous contact filtration (contact filter treatment). Water quality such as cyanobacterial biomass, microcystin-LR as well as organic matter and nutrients were measured in both treatment processes. We found cyanobacterial biomass and microcystin-LR level after the contact filter treatment was significantly different from the control treatment and also significantly different in the pond water. In addition, with contact filter treatment, total phosphorus (TP) and organic matter removal were significantly improved in the end water, TP was reduced by 96 % (< 20 µg/L) and the total organic carbon (TOC) was reduced by 66 % instead of 55 % (TOC content around 2.1 mg/L instead of 3.0 mg/L). This full-scale onsite experiment demonstrated effective pre-treatment would benefit a more stable water quality system, with less variance and lower cyanotoxin risk. In a broader drinking water management perspective, the presented method is promising to reduce cyanotoxin risk, as well as TP and TOC, which are all predicted to increase with global warming and extreme weather.}},
author = {{Li, Jing and Hägg, Kristofer and Persson, Kenneth M}},
issn = {{2073-4441}},
language = {{eng}},
month = {{09}},
number = {{10}},
publisher = {{MDPI AG}},
series = {{Water}},
title = {{The Impact of Lake Water Quality on the Performance of Mature Artificial Recharge Ponds}},
url = {{https://lup.lub.lu.se/search/files/69850899/water_11_01991.pdf}},
doi = {{10.3390/w11101991}},
volume = {{11}},
year = {{2019}},
}