Md Nurul Islam Siddique, Speaker at Green Chemistry Conferences
University Malaysia Terengganu, Malaysia
Title : Supplementation of additional nutrients and intermediate temperature on Bio-methane generation from anaerobic digestion of agricultural waste: Feasibility & Fertilizer recovery


The increase in demand for organisms drawn in with anaerobic digestion might be the consequence of many substrates being digested at the same time. This study looked at the impact of supplements on the co-digestion of growth substrates. An extra improvement plan that expects a critical occupancy in anaerobic digestion was used in three phases, 37 °C, 40 °C, and 50 °C. Biogas output increased to 1.38 times that of the control at 37 °C as a result of the modifications. Furthermore, the excellent use of this newly found mid-temperature greatly affected an intriguing philosophy as a consequence of 40 °C without additions (56 percent of VS end and 8.4 L-biogas). Biogas output surpassed 11.3 L with supplements during anaerobic co-digestion at 50 °C, and mL-CH4/g-VS was 1.24 times that of the system without any extra improvement. The results reveal that at each temperature, the improved course of action promotes co-digestion. The most generally utilized temperature on the advanced scale was 37 °C, which had the biggest influence on the utilization of improvements during the anaerobic process. Sludge was recovered at a rate of 0.09 m3 sludge/m3 substrate from the digester, while water was recovered at a rate of 0.86 m3 sludge/m3 substrate from the digester. The processed sludge may be utilized as compost, and the water can be used to water plants. The time it took to recoup the investment was found to be 3.77 years. As a result, it may be inferred that the current research might soon be recognized as a potential green solution for trash management across the world.

Audience take away: 

  • Anaerobic digestion (AD) collects methane and provides a source of renewable energy that is carbon neutral i.e. provides energy with no net increase in atmospheric CO2. Fertilizer - compared to undigested slurry, the nitrogen in digestate is more readily available as a plant nutrient.
  • Farming waste production around the globe is up to 6 million tons yearly. From these wastes, those that originate from regular trade are yet disposed of in landfills and used for the ignition method with no treatment. This methodology, along these lines, prompts higher GHG emanations and environmental pollution. Anaerobic co-fermentation has been demonstrated to be a successful methodology for improved bio-methane generation from wastes. The mix of different substrates improves nutrition in the digestion system. Thus, microbes have access to supplemented media with an appropriate nutrient equalization. The fundamental targets of co-digestion ought to support valuable associations, keeping away from hindrance and upgrading methane generation. Yes, this research that other faculty could use to expand their research or teaching. Yes, this provides a practical solution to a problem that could simplify or make a designer’s job more efficient. Yes, it improves the accuracy of a design or provides new information to assist in a design problem.  all other benefits are listed below:
  • Improved hydrolysis, pathogen removal, and minimum odor are the key benefits of a thermophilic run.
  • On the other hand, the mesophilic run saves energy and is not affected by shock loading than a thermophilic run.
  • Besides, a vast microbial community is estimated under a mesophilic state that may help to digest numerous types of organic substances.
  • The thermophilic state helps the elimination of pathogens and produces enhanced methane. Nevertheless, the use of intermediate temperatures has not been studied deeply which can influence the system.
  • The related works found in the literature didn't study the gap between the feasibility study and fertilizer recovery. Therefore, our work is novel and has detailed data and explanations on the feasibility study and fertilizer recovery.


Dr. Md Nurul Islam Siddique studied Civil Engineering at the Khulna University of Engineering & Technology, Bangladesh, and graduated as MS in 2012 from University Malaysia Pahang. He then joined the research group of Prof. Zularisam at the Institute of University Malaysia Pahang. He received her Ph.D. degree in 2015 at the same institution. After that, he obtained the position of Assistant Professor at the University Malaysia Pahang. She has published more than 40 research articles in ISI journals.