The dynamics of poultry waste co-combustion with solid biomass has been theoretically and experimentally analyzed by authors in several works. The current work is focused on a case study regarding the energy recovery from poultry waste in order to use it for heating a 1000 m³ chicken rearing complex, considering the specific climatic conditions in Romania. Even if biomass has significant national potential, there are only a few experimental incentives in our country to use it for energy production. Since poultry manure is characterized by high moisture and low calorific value, its co-combustion with solid biomass was chosen. Thus, laboratory experiments involving the combustion of 20–30% poultry waste were carried out on a 55 kW pilot boiler. This is an environmentally friendly and low-cost approach. The tests showed that phosphorus and potassium are concentrated by the combustible mass disappearance in the ash (P = 3.2–5.5% and K = 2.2–3.8%), leading to the conclusion that it represents a much more valuable fertilizer than raw waste, since it is lighter and much easier to store, transport, and spread over the agricultural area. The poultry waste mix with solid biomass was taken into account for heating a chicken rearing hall module by considering the needs of each period (cycle) in the development of the chicken-bird flow in accordance with a temperate-continental climate, such as Romania’s climate. The resulting annual fuel consumption is 53.27 t. This quantity represents 42.60 t of biomass and 10.67 t of poultry manure. The co-combustion showed pollutant emissions within the legal limits and no presence of ammonia, which was incinerated on the biomass layer surface.

This study investigates the combustion behavior of H₂–CH₄ mixtures with oxygen-enriched air, achieved through injecting ozone (O₃) into the air intake of the burner fan. The motivation for this approach lies in the high reactivity of hydrogen compared to methane, with the aim of promoting a more favorable oxidizing environment for overall combustion. The research combines theoretical analysis with experimental validation using a diffusion-type burner operating at a fuel flow rate of 1.2 Nm³/h. For this flow rate, the ozone injection led to an equivalent O₂ concentration of approximately 21.7%. At this enrichment level, flame temperature was calculated to increase by 70–90 °C. The burner was specifically designed for the diffusion combustion of H₂–CH₄ mixtures and features three fuel injection nozzles, each surrounded by five air inlets. Experiments employed premixed H₂-CH₄ gas cylinders (Linde) with hydrogen concentrations of 20% and 30%, respectively. The results confirmed slight combustion intensification due to elevated oxygen concentration, with no issues related to flame stability or pulsations observed. Core flame temperature and flue gas emissions, including CO₂, were measured. The results support the further development of this combustion technology by increasing the allowable oxygen concentration limit.