Advanced BioFuels USA

(Bionetix International/Canadian Biomass Magazine) … Overcoming Biogas Inhibitors with BCP12

An extremely limiting factor for biogas production is the fact that plant-based biomass, a common biogas feedstock, can inhibit the hydrolysis and acidogenesis phases of biogas production. Poor performance at these stages also limits final biogas production capacity. BCP12 is an excellent companion to carry the microbial population through this critical period by adding beneficial bacteria and nutrients to the microbial population already in the biogas production area. These processes are respectively called bioaugmentation and biostimulation.

BCP12 is a bioaugmentation treatment tested at York University to evaluate its performance in the presence of inhibitors from plant-based biomass. During the test, BCP12 was added to three different bacteria strains: Arthrobacter, Bacillus subtilis, and Pseudomonas putida. In each hydrolysate sample, the concentration of bacteria grew (by 30%, 53%, and 58%, respectively) compared to the controls, indicating the effectiveness of BCP12 even in the presence of certain inhibitors.* BCP12 is also a great addition to non-plant-based feedstocks, with side benefits of loosening and liquefying heavy grease, reducing unpleasant odours, and controlling FOG and grease cap buildup in anaerobic digesters.

Biogas production ultimately depends on the efficiency of the microbial population in the anaerobic digester, which in turn hinges on colony health and proper nutrition. If insufficient nutrients are available, biogas production efficiency will be down because microbes will not have the resources they need to grow, reproduce, and digest waste at a sufficient rate to keep up with biomass volume.

Since the need for micronutrients is more often overlooked than the need for macronutrients (e.g., nitrogen and phosphorus), Bionetix International has developed BIOGAS BOOSTER 3 with three micronutrients selected to boost biogas production, process stability, and efficiency. BIOGAS BOOSTER 3 was also among the products tested at York University and showed increased biogas production after only one week of treatment, with continuing benefits expected after acclimatization.* BIOGAS BOOSTER 3 is a great way to stabilize production both under normal circumstances and when there is a large influx of waste in the anaerobic digester.

Biomass-Specific Treatment

While the above products can go a long way toward promoting a healthy microbial population for biogas generation, bioaugmentation with feedstock-specific bacterial blends can also be beneficial. For example, BCP57 is designed for bioaugmentation of pulp and paper wastewater and can be added to boost biogas efficiency of plant-based feedstock, as well. BCP80, designed to speed up digestion of animal waste, is a great addition to manure feedstock. READ MORE