Properties of biofertilizers as compared to untreated animal waste

Properties of biofertilizers as compared to untreated animal waste

Agro-industrial production is the source of a significant amount of harmful emissions of gases and organic waste to the environment, which substantially affects the state of environmental ecology. Analyzing the current situation with the indication of only three components of atmospheric pollution (see Fig.), It should be emphasized that the environmental losses from such activities in rural areas do not correlate with the corresponding in industry and the specific weight of gross agricultural and industrial products. Therefore, the technology that Facilitate anthropogenic impact on the environment, should be actively implemented in rural areas. Biomass methanogenesis processes can effectively counteract the increase of harmful emissions of gases of agricultural origin.

Table. Emissions of agricultural production N2O, CH4 and NH3 in the general balance of industries (Source: Biofuels, 2004)
During biogas production in fermenters there are biological processes that are similar to processes in the gastrointestinal tract of farm animals. For example, the Center for Agricultural Technology (Augustensberg, Germany) conducted a series of studies on bio-fertilization from existing biogas complexes to determine the quantity and quality of nutrients and the effectiveness of their use as fertilizers (see Table). The following substrates were studied:

  1. Raw cabbage of cattle;
  2. Biofuels after biogas production in 3 variants:
  • Bovine Bullion + Renewable Raw Material (corn silage)
  • Swine + reclaimable raw material (corn silage)
  • Renewable raw material (corn silage)
Table. Indicators and properties of bio fertilizer after biogas production and untreated animal waste (Source: FNR, 2010)

As a result of the research, it was established:

  1. The content of dry matter in biodiferous plants is approximately 2% lower compared to untreated layers of cattle
  2. The content of total nitrogen in biofertilizers is at the level of 4.6-4.7 kg / g of fresh weight, which is somewhat higher in comparison with raw roughage of cattle
  3. The ratio of C / N is 5-6, which is significantly lower in comparison with raw crust of cattle, the ratio of C / N, which is an average of 10.
  4. During anaerobic fermentation, the organic matter is cleaved and thus provides the transition of organically bound to inorganically bound nitrogen and, accordingly, to increase the amount of ammonium to 70% in total nitrogen in bio fertilizers.
  5. No significant differences in the content of nutrients (calcium, magnesium, sulfur) were noted.


Sidorchuk O., Ph.D.