Abstract
This study was aimed at identifying indigenous microorganisms from palm oil mill effluent (POME) and to ascertain the microbial load. Isolation and identification of indigenous microorganisms was subjected to standard microbiological methods and sequencing of the 16S rRNA and 18S rRNA genes. Sequencing of the 16S rRNA and 18S rRNA genes for the microbial strains signifies that they were known as Micrococcus luteus 101PB, Stenotrophomonas maltophilia 102PB, Bacillus cereus 103PB, Providencia vermicola 104PB, Klebsiella pneumoniae 105PB, Bacillus subtilis 106PB, Aspergillus fumigatus 107PF, Aspergillus nomius 108PF, Aspergillus niger 109PF and Meyerozyma guilliermondii 110PF. Results revealed that the population of total heterotrophic bacteria (THB) ranged from 9.5 × 105 – 7.9 × 106 cfu/mL. The total heterotrophic fungi (THF) ranged from 2.1 × 104 – 6.4 × 104 cfu/mL. Total viable heterotrophic indigenous microbial population on CMC agar ranged from 8.2 × 105 – 9.1 × 106 cfu/mL and 1.4 × 103 – 3.4 × 103 cfu/mL for bacteria and fungi respectively. The microbial population of oil degrading bacteria (ODB) ranged from 6.4 × 105 – 4.8 × 106 cfu/mL and the oil degrading fungi (ODF) ranged from 2.8 × 103 – 4.7 × 104 cfu/mL. The findings revealed that microorganisms flourish well in POME. Therefore, this denotes that isolating native microorganisms from POME is imperative for effectual bioremediation, biotreatment and biodegradation of industrial wastewaters.
Highlights
Industrial wastewaters are essential habitat for diverse microbes
The findings revealed that oil degrading bacteria (ODB) and oil degrading fungi (ODF) flourish well in oily waste water
The presence of Micrococcus luteus 101PB, Stenotrophomonas maltophilia 102PB, Bacillus cereus 103PB, Bacillus subtilis 106PB, Aspergillus fumigatus 107PF and Aspergillus niger 109PF isolated from palm oil mill effluent (POME) sample in the current study revealed that these microorganisms are capable of biodegradation of oily wastewaters as reported by other researchers (Ohimain et al 2012a; 2012b; 2012c; Nwuche & Ogbonna 2011)
Summary
Industrial wastewaters are essential habitat for diverse microbes. Some of the microorganisms have been used for biotreatment of wastewaters (AbdelRaouf et al 2012; Bala et al 2014a, 2014b, 2014c; Bala et al 2015a, 2015b; Bala 2016). Microorganisms domiciled in diverse wastewaters can cause diseases such as tuberculosis, cholera, typhoid, dermatomycosis, hepatitis and dysentery (Shaaban et al 2004). Palm oil industry has become one of the most important agricultural based industries in Malaysia that produce colossal amount of oily liquid wastewater universally named as palm oil mill effluent (POME) (Ahmad et al 2005; Rupani et al 2010; Mohammed et al 2014). Palm oil mill wastewater is produced during oil extraction processes in palm oil mill industries. POME is an extremely polluting wastewater that contaminates the environment when released directly into rivers, streams or lakes devoid of treatment
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