Time series relationships between chlorophyll-a, dissolved oxygen, and pH in three facultative wastewater stabilization ponds

Wallace, Jack; Champagne, Pascale; Hall, Geof

doi:10.1039/c6ew00202a

Cited by 17 publications

(11 citation statements)

References 11 publications

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“…Besides that, turbulence and vertical mixing deliver oxygen-rich water resulted due to strong wind during monsoon as well as daily high tide (Vanchonet al, 2010). Furthermore, a high dissolved oxygen level might be due to photosynthetic activitiesof algae growth (Wallace et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Effect of dissolved oxygen deficiency on 210Pb content in mussel's tissues at the Johor strait, Malaysia

Saili¹,

Mohamed²

2021

JEB

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Aim: To investigate the effect of dissolved oxygen deficiency on the level of 210Pb in mussel's tissues, Perna viridis which has been reported to be highly tolerant to hypoxia. Methodology: Mussels (Perna viridis), seawater and sediment samples were collected from nine stations along the Johor Straits during North-east monsoon (November 2017), inter-monsoon (March 2018), and South-west monsoon (August 2018). The 210Pb contents were extracted and estimated by Gross Alpha-beta Counter. Results: The lowest dissolved oxygen was recorded at Station 4 which decreased from 2.14 mg l-1 to 2.10 mg l-1 and subsequently to 1.63 mg l-1 during first to third samplings. In sediment, 210Pb activities increased with the increase in organic matter. Meanwhile, in mussels, the 210Pb activities showed almost similar trend with sediment where 210Pb activities were much higher adjacent to the causeway structure, especially at the East part of Johor Strait. The level of 210Pb in mussel's tissue and sediment also increased with decreasing level of dissolved oxygen. Interpretation: A causeway structure disrupted the water quality of Johor Straits and caused almost hypoxic conditions nearby. The coverage of oxygen depletion expanded during inter-monsoon. An inverse relationship between 210Pb activities and dissolved oxygen prove that deficiency of dissolved oxygen potentially influenced the bioaccumulation of 210Pb in mussels to correspond to the build-up of concentration factor in their tissues which exceeded the recommended value.

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Section: Resultsmentioning

confidence: 99%

Effect of dissolved oxygen deficiency on 210Pb content in mussel's tissues at the Johor strait, Malaysia

Saili¹,

Mohamed²

2021

JEB

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“…This design approach is currently being evaluated for the system in a related study. Vegetation in CWs are highly effective at buffering and controlling pH, as noted in a number of studies [52][53][54][55][56]. CWs differ from WSPs in that the wastewater flows, either partially or fully, through layers of gravel or soil media rooted with plants, in addition to areas of open water containing floating and emergent vegetation [8,57].…”

Section: Discussionmentioning

confidence: 99%

Determination of Algae and Macrophyte Species Distribution in Three Wastewater Stabilization Ponds Using Metagenomics Analysis

Wallace

Champagne

Hall

et al. 2015

Water

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This study involved the evaluation of algae and macrophyte species distributions in three wastewater stabilization ponds (WSPs) at a wastewater treatment plant in Ontario, Canada, which has experienced high pH levels at the final effluent and excessive algae growth during the summer since 2003. From samples collected from the system, the relative abundances of specific algae and aquatic plant (macrophyte) taxa were assessed and correlated to water chemistry data. A strong shift from the dominance of green algae, chlorophyceae, in WSP#2, to the dominance of aquatic macrophytes, embryophyta, in WSP#4, was observed and corresponded to field observations. Correlation of the abundances to nutrient parameters suggested that the macronutrient rich conditions in WSP#2 allowed floating green algae to proliferate against macrophytes. In WSP#1 and WSP#4, macrophytes competed against algae and thrived, due to their adaptability to lower nutrient conditions. The pH increases occurred primarily in WSP#2 and were not buffered or reduced in WSP#1 and WSP#4. Two alternatives strategies for pH control were recommended for the system: decreasing algae growth in WSP#2 through duckweed OPEN ACCESSWater 2015, 7 3226 seeding or macronutrient loading reduction; or designing and implementing a constructed wetland (CW) in WSP#4 with soil and vegetation to buffer pH prior to release.

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“…Microalgae are highly dependent on environmental conditions such as solar radiation and temperature, as well as on their diurnal and seasonal variations (Morillas‐España, Lafarga, Gómez‐Serrano, Acién‐Fernández, & Gonzalez‐López, 2020; Wallace, Champagne, & Hall, 2016). Hence, the selection of the microalgae cultivating place is essential to obtain maximum microalgae performance.…”

Section: Microalgae Cultivationmentioning

confidence: 99%

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

et al. 2021

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Although microalgae‐based wastewater treatment has been traditionally carried out in extensive waste stabilization ponds, recent trends focus on the use of microalgae to apply the circular economy principles in the wastewater treatment sector due to the capacity of algae to absorb carbon dioxide while recovering nutrients from sewage. To this aim, the development of new intensive microalgae‐based systems with higher efficiency and level of process control is required. Results obtained for these systems at lab scale are generally promising. However, upscaling to outdoor conditions is often uncertain. Some advances have been made in terms of applying open systems at large scale. However, there are still some issues related to land requirements and the economic feasibility and robustness of the process that have to be overcome to widely implement these systems. This article aims at describing the main design and operating factors regarding outdoor microalgae cultivation. It will also explain some microalgae cultivation technologies to treat wastewater, showing their advantages, disadvantages, and the possibility to treat different wastewater streams with microalgae cultures. Future perspectives of this biotechnology will be commented as well. This article is categorized under: Engineering Water > Engineering Water

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Time series relationships between chlorophyll-a, dissolved oxygen, and pH in three facultative wastewater stabilization ponds

Abstract: This study involved the evaluation of time-series relationships between chlorophyll-a (chl-a), dissolved oxygen (DO), and pH in three facultative wastewater stabilization ponds (WSPs) operated in series at a wastewater treatment plant in eastern Ontario, Canada.

Cited by 17 publications

References 11 publications

Effect of dissolved oxygen deficiency on 210Pb content in mussel's tissues at the Johor strait, Malaysia

Effect of dissolved oxygen deficiency on 210Pb content in mussel's tissues at the Johor strait, Malaysia

Determination of Algae and Macrophyte Species Distribution in Three Wastewater Stabilization Ponds Using Metagenomics Analysis

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

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