Aerobic mesophilic treatment of potato industry wastewater
An evaluation of a laboratory-scale aerobic method for the treatment of potato-processing wastewater at 37°C was investigated. Composite samples were collected to establish batch variations. The wastewater was characterized for Chemical Oxygen Demand (COD), Permanganate Value (PV), Total Solids (...
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| Main Authors: | , , |
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| Format: | research article |
| Language: | English |
| Published: |
Academic Journals
2023
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| Subjects: | |
| Online Access: | https://cris.library.msu.ac.zw//handle/11408/5605 https://academicjournals.org/journal/IJWREE/article-full-text-pdf/6DD1FF654165 |
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| Summary: | An evaluation of a laboratory-scale aerobic method for the treatment of potato-processing wastewater
at 37°C was investigated. Composite samples were collected to establish batch variations. The
wastewater was characterized for Chemical Oxygen Demand (COD), Permanganate Value (PV), Total
Solids (TS), phosphates and pH over a period of 6 months. Wastewater with an average of 6.8 g COD/l,
high concentration of total solids (up to 6725 mg/l), and low pH was subjected to active sludge
treatment in a Continuously Stirred Tank Reactor (CSTR) with Organic Loading Rates (OLRs) gradually
increased from 3.4 to 12.1 g COD/litre/day. Stepwise increase in OLR reduced average COD reduction
from 86% at 3.4 g COD/litre/day to 76% at 12.1 g COD/litre/day. High rates of treatment efficiency (TE)
were recorded at low OLRs (<6.8 g COD/litre day) with a notable pH of the effluent increasing from 4 to
neutral values. TS reduction was achieved at 57% at HRT of 2 d. This study indicated that biological
methods can be used for treatment of potato-processing wastewater in order to reduce the organic load
and other pollutants acceptable levels for municipal discharge. |
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