Dynamics of Micro/Macro Elements and Heavy Metals during Anaerobic Treatment of Organic Fraction of Municipal Solid Waste (OFMSW)
Journal Title: Asian Journal of Biotechnology and Bioresource Technology - Year 2017, Vol 2, Issue 1
Abstract
In this study, the dynamics of macro and micro elements (including heavy metals) during anaerobic treatment of organic fraction of municipal solid waste (OFMSW) was investigated to determine the effect of seasonal variation on the performance of the treatment process. The first anaerobic digestion (ADH) process was conducted during the dry season (between March and May, 2016) while the second anaerobic digestion (ADC) process was conducted during the rainy season (between July and early October, 2016). OFMSW was collected and subjected to anaerobic treatment inside one-stage 250 litre – capacity batch-type mesophilic reactors with useful volume of 230 litres, substrate (OFMSW) concentration of 5.53%, rumen juice as the source of microbial inoculum and a retention time of 84 days. To monitor the treatment process, temperature, pH, macro and micro elements including heavy metals were estimated with time. Result showed that average process temperature inside the reactors (ADH and ADC) during the dry and rainy season ranged from 29.7ºC to 39.3ºC and 26.8ºC to 30.8ºC respectively after 84 days. Inside the reactors (ADH and ADC), cumulative biogas increased to 34.8 L and 26.5 L while nickel, iron and cobalt ranged from 6.80 to 1.52 mg/l and 6.62 to 0.93 mg/l, 21.40 to 1.25 mg/l and 23.70 to 5.7 mg/l, and 2.14 to 0.63 mg/l and 2.21 to 0.64 mg/l respectively after 84 days. Cadmium, chromium and mercury ranged from 2.91 to 0.05 mg/l and 2.64 to 1.1 mg/l, 1.84 to 0.06 mg/l and 1.81 to 0.8 mg/l and 0.58 to 0.02 mg/l and 0.57 to 0.08 mg/l respectively after 84 days. This suggests that anaerobic digestion could be applied to reduce the concentration of heavy metals in biodegradable wastes to some degree before the wastes can be disposed into the environment. Nevertheless, it appears that the anaerobic digestion (ADH) process conducted during the dry season may have performed better than the anaerobic digestion (ADC) process conducted during the rainy season in terms of reducing the concentration of these elements as was biogas production with time.
Authors and Affiliations
H. O. Stanley, C. B. Ogbonna, G. O. Abu
Keywords
Related Articles
- EP ID EP337923
- DOI 10.9734/AJB2T/2017/37831
- Views 80
- Downloads 0
Phytochemical Components, Antioxidant and Cytotoxic Activities of Mulberry Mistletoe (Loranthus parasiticus Merr) Leaves Extracts
Herein, we investigated the effects of solvents on the phytochemical components, antioxidant activities, and cytotoxicity of Mulberry mistletoe leaves. An FT-IR method was performed to identify the essential functional g...
Evaluation of the Phytochemical Composition and Pasting Characteristics of African Locust Bean Pulp Flour, Wheat Flour and Blends
Aim: The study determined the phytochemical composition and pasting properties of locust bean pulp, wheat flour and the blends. Study Design: The experiments in carried out in three replications in completely randomized...
Physicochemical, Sensory and Microbiological Properties of Syrup and Jam Prepared from Locust Bean Fruit Pulp in Storage
Aim: To evaluate the storage properties of jam and syrup prepared from African locust bean pulp in storage at ambient conditions. Study Design: The study was carried out in three replications in completely randomized de...
Optimization of Extraction Procedure for Isolation, Identification & Quantification of Piperine from Roots of Piper longum Linn.
Aim: Piperine which is mainly found in the fruits and roots of the Piper longum plant and is a medicinally active bio-molecular compound, used as potential ingredient in preparation of several medicines. This present stu...
Determination of Proximate, Mineral and Vitamin Composition on the Leaf and Stem of Desmodium velutinum (Willd.) DC
Proximate, Mineral and Vitamin composition on the leaf and stem of D. velutinum were evaluated to determine its nutritional characters using standard techniques. Data obtained were analyzed using independent sample T-tes...