Factors influencing chemical quality of composted poultry waste

Abstract

The need for organic recycling is justified in the case of poultry waste because after ensuring hygienization there is a chance of obtaining a compost with substantial fertilizer value. Organic recycling of slaughter waste has its justification in sustainable development and retardation of resources. In the research being described, composting of hydrated poultry slaughterhouse waste with maize straw was carried out. Combinations with fodder yeast and postcellulose lime were also introduced in order to modify chemical and physicochemical properties of the mixtures. The experiment was carried out within 110 days in 1.2 × 1.0 × 0.8 m laboratory reactors. Temperature of the biomass was recorded during composting, and the biomass was actively aerated through a perforated bottom.Composting of substrates selected in such a way caused losses of some elements in gaseous form, an increase in concentration of other elements, and changes in relationships between elements. The ability to select substrates influences compost quality. This ability is determined by chemical indicators. Among other things, compost evaluation based on carbon to nitrogen ratio shows the intensity of the composting process and possible nitrogen losses. The addition of slaughter waste to maize straw reduced the content of individual fractions of carbon in the composts, whereas the addition of postcellulose lime intensified that process. The addition of fodder yeast significantly increased the phosphorus content in the compost. Since iron compounds were used in the processing of poultry carcasses, composts that were based on this material had an elevated iron content. The applied postcellulose lime significantly increased the copper, zinc, chromium, nickel, and lead contents. Proper selection of substrates for composting of hydrated poultry slaughterhouse waste allows to obtain a compost with chemical properties that create favorable conditions for natural application of that compost. Addition of large quantities of postcellulose lime to the composting process leads to obtaining an organic-mineral substratum for cultivation or to obtaining an agent that improves soil properties.

Unveiling the Efficiency of Psychrophillic Aporrectodea caliginosa in Deciphering the Nutrients from Dalweed and Cow Manure with Bio-Optimization of Coprolites

“…CM-based vermicomposting enhances growth and reproduction of earthworms and microbials leading to bio-stabilized nutrient rich vermifertilizer [13,14,19]. Vermicomposting, a bioecologically sustainable technology [20]), has been regarded as an ecofriendly alternative for solid waste recycling [21]. Vermitechnology causes environmental sustainability by minimizing the pollution risks associated with bio wastes and generating castings which act as a conditioner for soil and plant growth [14]).…”

Assessment of a Cattle Manure Vermicomposting System Using Material Flow Analysis: A Case Study from Uganda

“…Vermicomposting, which is the biodegradation of organic wastes using earthworms and microorganisms [8][9][10], has been reported as an effective and relatively inexpensive cattle manure management technology [11,12]. The technology is also considered a bioecologically sustainable process in which renewable biological resources with an added value are produced [13]. In this aspect, vermicompost, a plant-nutrient-rich product [14], and earthworm biomass that can be used as animal, poultry or aquaculture feed, are produced.…”

Effects of compost quality from non-dairy creamer sewage sludge-solid compost biogas-rice husk char on bok choy mustard (Brassica rapa L.)

“…Composting could increase the concentration of P total in the compost pile and decrease soluble P fractions leaching which might cause environmental problems following land application. An increase of P on compost was correlated with an increase in microbial P, pH value, decrease in organic matter, and decrease in the C: N ratio compost (Kopec et al, 2018).…”

“…The longer the composting process will produce compost with a low C: N ratio. Mature compost has a C: N ratio of around 15-10: 1 (Kopec et al, 2018). By Park et al (2019) stated that the C: N ratio decreased with long composting times, and the C: N ratio of compost between 5 and 6 was a suitable value indicating compost maturity.…”