Anaerobic co-digestion of pre-treated press mud and Molasses-based distillery wastewater enhanced biogas production

Abstract

With goals in determining the effect of diluting the distillery wastewater (DWW) and of varying the amount of DWW and press mud (PM), anaerobic co-digestion study was carried out at mesophilic condition in a 2-L Erlenmeyer flask, with a working volume of 800 mL for Batch 1 and 1500 mL for Batch 2 experiments. For Batch 1, two different ratios of DWW and tap water, with 2:3 and 3:2, were used to assess the effect of dilution on the methane yield, where same volumetric amount of PM was added. For Batch 2, following ratio of PM and DWW were used: a) 1:0, b) 1:1, c) 1:1, d) 2:1, and e) 1:2. All samples had the same amount of inoculum, except that Batch 1 samples had bagasse. The parameters that were assessed after 42 days of digestion were: pH, COD, BOD, TSS, VS, Cu, Ca, Mg, Mn, TOC, TN, and methane yield. For the effect of dilution, a significant difference in the methane yield between samples with higher and lower dilution ratio was seen, and in the first batch, the optimal dilution ratio of DWW and H2O, with 3:2 gave higher methane yield of 78.23% (v/v). Meanwhile, optimal volumetric ratio of DWW and PM from the Batch 2 experiments, with value of 1:2, gave the highest methane yield of 79.43% (v/v).

Theoretical Biochemical Methane Potential Generated by the Anaerobic Digestion of Mustard Green Residues in Different Dilution Volumes

“…[18] reported that as dilution increased, the biogas production also increased during the anaerobic digestion of cow dung. A similar result exposed that the highest dilution generated high methane [19].…”

Anaerobic co-digestion of pressmud with vegetable waste in batch reactor for enhanced biogas production

“…The global landscape of waste management and sustainable energy generation has spurred an intensified exploration of innovative approaches to address these pressing challenges [1]. Anaerobic co-digestion, a novel biotechnological solution, has gained prominence as a promising method for simultaneously managing organic waste and producing renewable energy [2]. The pressing challenges of population growth, urbanization, and industrialization have accentuated the global demand for energy and aggravated the environmental burden of organic waste disposal [3], [4].…”