Characterising winery wastewater composition to optimise treatment and reuse

Johnson, Melody Blythe; Mehrvar, Mehrab

doi:10.1111/ajgw.12453

Cited by 14 publications

(18 citation statements)

References 17 publications

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“…The characteristics of WWW accepted for co-treatment at the Niagara Region's municipal WWTPs can vary significantly from load to load, reaching COD and TSS concentrations in excess of 300,000 mg/L and 80,000 mg/L [1]. To assess the feasibility of utilizing the Fenton-like process for initial treatment of WWW, all experiments were conducted on a sample of high-strength WWW collected during the vintage period.…”

Section: Winery Wastewatermentioning

confidence: 99%

“…WWW has high concentrations of sugar from grape pulp [1], which can create complexes with Fe 3+ that remain soluble at alkaline pH [37]. Therefore, the presence of sugar This behaviour could also explain the apparent decrease in removal rates at reaction times exceeding the apparent optimal value observed during the BBD trials.…”

Section: Time Series Treatment Trialsmentioning

confidence: 99%

“…WWW has high concentrations of sugar from grape pulp [1], which can create complexes with Fe 3+ that remain soluble at alkaline pH [37]. Therefore, the presence of sugar and, potentially, other iron-complexing organic compounds in the WWW could explain the observed limited iron sludge generation during post-Fenton-like pH adjustment.…”

Section: Time Series Treatment Trialsmentioning

confidence: 99%

“…WWW has high concentrations of sugar from grape pulp [1], which can create complexes with Fe 3+ that remain soluble at alkaline pH [37]. Therefore, the presence of sugar Despite this, it can be concluded that the extent of treatment of WWW by Fenton-like reaction can likely be best assessed by quantifying the ISS generation rate in the quenched, pH-adjusted samples.…”

Section: Time Series Treatment Trialsmentioning

confidence: 99%

“…Winery wastewater (WWW), generated during the wine-making process, is a complex and highly variable waste stream [1,2]. Despite many wineries being equipped with onsite treatment, hauling WWW to municipal wastewater treatment plants (WWTPs) for cotreatment remains a common practice in wine-making regions [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Treatment of Actual Winery Wastewater by Fenton-like Process: Optimization to Improve Organic Removal, Reduce Inorganic Sludge Production and Enhance Co-Treatment at Municipal Wastewater Treatment Facilities

Johnson

Mehrvar

2021

Water

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Despite many wineries being equipped with onsite wastewater treatment, winery wastewater (WWW) co-treatment at municipal wastewater treatment plants (WWTPs) remains a common practice in wine-making regions. The complex and highly variable nature of WWW can result in negative impacts on WWTP operations, highlighting a need for improved co-treatment methods. In this paper, the feasibility of using the Fenton-like process to pre-treat WWW to enhance co-treatment at municipal WWTPs is assessed. First-stage pre-treatment of the WWW, in the form of dilution and settling or aerobic biological treatment, is used prior to the Fenton-like process. A three-factor BBD experimental design is used to identify optimal reaction time and initial H2O2 and Fe3+ concentrations. Chemical oxygen demand (COD) and total organic carbon (TOC) removal rates are not able to accurately reflect the extent of reaction. Additional trials identified solubilization of particulate COD and TOC, as well as samples handling requirements prior to analysis, as factors affecting the apparent COD and TOC removal rates. Inert suspended solids (ISS) generated during the sample handling process are found to be the response variable best suited to quantifying the extent of the Fenton-like reaction. Maximum ISS generation is observed at initial H2O2 and Fe3+ concentrations of 4000 mg/L and 325 mg/L, however, results suggest that optimal concentrations exceed these values. The impact of adding pre-treated WWW, with and without Fenton-like treatment, to municipal WWTPs’ primary clarifiers and aerobic bioreactors is also assessed via bench-scale trials. Challenges associated with co-treating WWW are found to remain despite the pre-treatment alternatives investigated, including negative impacts on simulated primary and secondary effluent quality. The Fenton-like AOP provides limited opportunity to optimize or enhance co-treatment at municipal WWTPs.

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Section: Winery Wastewatermentioning

confidence: 99%

Section: Time Series Treatment Trialsmentioning

confidence: 99%