Efficacy of Aspergillus fumigatus MCC 1175 for Bioremediation of Tannery Wastewater

Abstract

Tannery effluent is characterized by high concentrations of chromium, nitrogen, sulfur compounds, and organic matter such as tannins. Chromium and tannins are considered an important source of contamination due to their toxic nature and large volume of liquid discharged and solid sludge produced. In the present study, bioremediation of chromium and tannic acid is studied in a batch culture system using response surface methodology. Scanning electron microscopy (SEM) coupled with energy‐dispersive X‐ray (EDX) and Fourier‐transform infrared spectroscopy (FTIR) are used to investigate adsorption phenomena. A chromium and tannic acid resistance fungal strain is isolated from tannery effluent, and identified as Aspergillus fumigatus MCC 1175 based on its 18S rDNA gene sequence. The minimum inhibitory condition (MIC) of the isolate against chromium and tannic acid was found to be 0.2 and 10 mg mL−1, respectively. The maximum Cr(VI) removal efficiency of 65.1% is found at optimum condition of pH 7, 96 h incubation period, 2.75% inoculum, and 0.1 mg mL−1 chromium. The maximum degradation of tannic acid (63.0%) occurs at pH 5, 27.5 mg mL−1 tannic acid, 100 rpm agitation speed, and an incubation period of 96 h. FTIR analysis of A. fumigatus MCC 1175 revealed the presence of carboxyl and phosphate groups as possible binding sites.

Adsorption Characteristics of Indigenous Chromium-Resistant Aspergillus niger Strain Isolated from Red Soil for Remediation of Toxic Chromium in Red Soil Environments

“…The A. niger isolated and purified in the present study has previously been used to remove heavy metals from sewage [ 35 ]. Recent studies show that chitosan or other extracellular polymeric substances (EPS) on the cell wall of A. niger can cooperate with various functional groups to complete the extracellular adsorption of heavy metal ions [ 36 , 37 , 38 ]. In this study, FTIR analysis showed that many reducing groups on the surface of A. niger were involved in the fixation of Cr 6+ , such as -C=C-, -C=0, -C-O-C, and -NH 3 .…”

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

“…Other compounds have been reported in these wastewaters, finding results of acidic pH between 3.4 ± 0.0351 and 5.96 ± 0.0351 [ 56 , 57 , 58 ] and basic pH between 8.0 ± 0.4 and 11.64 ± 0.53 [ 37 , 41 , 46 , 51 , 52 , 54 , 55 , 59 , 60 , 61 ]; in relation to TDS, typical values can have concentrations ranging from 2355 ± 85 mg*L −1 to 10,000 ± 800 mg*L −1 [ 9 , 37 , 39 , 42 , 61 , 62 ]; high concentrations have been recorded that can be between 10,560 ± 78 mg*L −1 and 72,400 ± 0.10 mg*L −1 [ 35 , 40 , 53 , 54 , 55 , 63 ]; as for BOD, the average values can be in low ranges from 160 ± 15.8 mg*L −1 to 1250 ± 38 mg*L −1 [ 37 , 39 , 61 , 63 ] and in high ranges that fluctuate between 1500 ± 41 mg*L −1 and 6000 ± 30 mg*L −1 [ 9 , 49 , 50 , 51 , 53 , 54 , 55 ]. In relation to the total chromium concentration, values ranging from 0.83 ± 0.028 mg*L −1 to 134 ± 5.8 mg*L −1 have been reported [ 9 , 35 , 38 , 40 , 61 , 64 ], as well as high ranges from 147.4 ± 1.5 to 3800 ± 115 mg*L −1 [ 35 , 37 , <...>…”

Biodiesel Production from Bioremediation of Palm Oil Mill Effluent via Oleaginous Fungi

“…Bioremediation is a more favorable wastewater treatment method compared to other physicochemical methods as it is cost‐effective and greener. [ 18 ]…”