Control measures to reduce clogging in a St. Lawrence River water treatment process using slow sand filtration

Caroline Côté, researcher

Caroline Côté

Researcher

450 653-7368
ext 310

Contact Caroline Côté

Description

Previous studies showed that measures were required to control populations of E. coli and zebra mussel larva in water from the St. Lawrence. A system using slow sand filtration and an aerated pond was therefore installed at a farm on Île d'Orléans. Although this system has been proven to be effective for resolving both these problems, the sand filter can become clogged due to increased turbidity levels in the river at certain times of year and algal blooms in the water column above the filter. To manage this clogging risk, the project automated pumping based on water turbidity and cover the filter to prevent light from entering the water and thus reduce algal bloom. These control measures will improve technology transfer to other farmers who want to draw water from the river.

Objective(s)

  • Determine the impact of methods of controlling suspended solids and algae on clogging of the sand filter
  • Measure the effect of water turbidity on clogging of the sand filter in the lab
  • Automate pumping from the river based on water turbidity
  • Determine the effectiveness of covering the filter for algae control

From 2015 to 2018

Project duration

Market gardening, Fruit production, Field crops

Activity areas

Food safety and quality, Optimal water management

Services

Thanks to IRDA, it is possible for growers to tap into the Saint-Lawrence as an irrigation resource.

Partners

Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec | Université Laval | Ferme François Gosselin | Université de Sherbrooke

This may interest you

Oz weeding robot
2020-2023 • Market gardening

Assessing a weeding robot for use in organic market gardening

New, robotic weed control strategy for widespread use in field vegetables grown organically in Québec.

Researcher: Maryse Leblanc

Read more about the project

Maryse Leblanc
Striped cucumber beetle, Photo credit: IRIIS Phytoprotection
2019-2022 • Market gardening

Developing mass trapping strategies to control the striped cucumber beetle in organic cucurbit farming

This project aims to develop mass trapping strategies to keep damage caused by the striped cucumber beetle populations below the economic threshold, while minimizing the capture of pollinators and natural enemies.

Researcher: Annabelle Firlej

Read more about the project

Annabelle Firlej
Beetroots
2013-2018 • Market gardening

NPK fertilizer trials for beets on mineral soils in Québec

This project was aimed at determining the nutrient needs of beets based on soil texture and phosphorus and potassium levels under Québec growing conditions.

Researcher: Christine Landry

Read more about the project

Christine Landry