Bio methane potential of sludge from municipal sewer and exchange stations

Abstract

Technologies with resource recovery alternatives are suggested in metropolitan settings. Anaerobic digesters (AD) are the most common. The use of microcrystalline cellulose and a variety of grocery products as control feed increases the cost of bio methane potential analysis (BMP). This limits its replication, especially in developing countries. As a result, this study looks into the use of milled paper as a control feed during BMP analysis of sludge from sewer and exchange stations. A batch experimental study at 37 °C with hydraulic retention times of 23 and 24 days for exchange station and sewage sludge, respectively, was established for the assessment. The pH of the sewage sludge was acidic during the analysis. To avoid underestimating the total (TS) and volatile solid (VS) ratios, the VS should indeed be determined through temperature or pH adjustment. As a result, the preceding alternative was implemented in this work. According to the findings of the online biogas application, the blank (milled paper) accurately keeps the required validation standards. Furthermore, the gas production potential of sludge from the exchange station (ES) and the sewage line (SS) is 2.4 and 1.6 NL/gVs, respectively. The generated gas has an electric potential of 8.81 and 3.35 KWH for ESS and SS, respectively. Interestingly, the calorific values of the investigated substrates were also nearly equivalent. In brief, using milled paper as a control feed in BMP analysis reduces laboratory costs and encourages BMP test repetition, which is especially important in developing countries. This advances research on the use of AD in the search for alternative energy sources.

Physicochemical and Biological Characteristics of Shrimp Pond Sludge in the Thua Thien Hue Province, Vietnam

“…Similarly, Hung et al (2015) reported the average pH of the sludge samples collected from Ha Noi, Vietnam, was in the range of neutral to alkaline (7.04-7.4). In contrast to this, Selamawit and Agizew (2022) reported that the pH values of the sludge samples obtained from wastewater collected from the sewerage system and exchange stations were 5.1 and 6.9, respectively. Sudiartha et al (2022) reported that the pH of the aerated sludge sample was 7.09, and this value increases as the temperature increases.…”

“…Sewage sludge can be treated using biochemical, thermochemical, or mechanical methods to generate biogas. Recently, researchers have suggested that sludge has a lot of potential for gas production (Selamawit and Agizew 2022). According to a review report, the sludge of shrimp ponds contains particulate and dissolved organics such as microorganisms, leftover shrimp food, shrimp manure, and other organic substances.…”

“…According to studies, OMs decompose, and the grain size reduces within an anaerobic digester system. This improves the solubilization of organic waste, and the increased bacterial activity results in the release of hydrolytic enzymes, which significantly increases the extent of biogas production realized (Selamawit and Agizew 2022). It can be predicted that the CH4 yield depends on substrate origin and composition.…”

Methane Biogas Production in Malaysia: Challenge and Future Plan

“…Furthermore, a recent study by Al-samet et al showed that mixing sewage sludge with food waste had a synergistic effect that increased the amount of methane produced and enhanced the efficiency of the anaerobic digestion process [46]. Moreover, Selamwit and Agizew conducted the biomethane potential analysis (BMP) on a lab scale, and the results showed that the energy recovered from SS has an electric potential of 8.81 kWh [47]. Additionally, under the premise of sustainability, SS can be seen as a renewable energy source, and its combustion produces significantly fewer greenhouse gas emissions than fossil fuel energy output.…”

Improving Lignocellulosic and Non-Lignocellulosic Biomass Characteristics through Torrefaction Process

“…Nowadays, the sludge is landfilled [40], gasified, or pyrolyzed [41]. Every year, up to 10 million tonnes of dry sewage sludge are produced worldwide [42], and the number is still increasing due to the growing urban population and urbanization [43]. Legislation related to sewage sludge management has been very strict to ensure safe sludge usage in industry, especially in the EU, since the implementation of the new Urban Waste Water Treatment Directive (91/271/CEE) [44], which has also brought an increase in the installation of the wastewater treatment plants.…”