Static and Dynamic Investigations on Leaching/Retention of Nutrients from Raw Poultry Manure Biochars and Amended Agricultural Soil

Abstract

In this study, nutrients release/adsorption from/by raw poultry manure-derived biochar produced at a pyrolysis temperature of 600 °C (RPM-B) was assessed under static and dynamic conditions. Batch sequential leaching experiments of RPM-B for a total contact time of 10 days showed that both phosphorus and potassium were slowly released but with higher amounts compared to various other animal- and lignocellulosic-derived biochars. The cumulated released P and K amounts were assessed to 93.6 and 17.1 mg g−1, which represent about 95% and 43% of their original contents in the RPM-B, respectively. The column combined leaching/adsorption experiments showed that amending an alkaline sandy agricultural soil with two doses of RPM-B (at 5% and 8% w:w) resulted in an efficient retention of NO3-N and NH4-N, and on the contrary, important leached amounts of PO4-P, K+, Mg2+, and Ca2+ but with relatively slow kinetic release rates for a long period. Even after 40 days of dynamic leaching, these latter nutrients continued to be released with kinetic rates lower than 10 mg kg−1 d−1. Thus, compared to synthetic fertilizers, RPM-B valorization as organic amendment for poor semiarid soils could be considered as an attractive, eco-friendly, and sustainable waste recycling option.

Biochar from date palm (Phoenix dactylifera L.) residues—a critical review

“…It is the thermal deprivation of any waste biomass in a no oxygen atmosphere to produce condensable vapors, gases, and charcoal. The solid carbon rich product of the process is biochar or char and the volatile fraction of pyrolysis is partly condensed to a liquid fraction called tar or bio-oil, along with the formation of a mixture of low molecular weight gas such as carbon di oxide, hydrogen, carbon monoxide, and methane in different ratios (Hadroug et al 2021 ). During the charring process, carbon is converted into aromatic structure that are more difficult to break down when compared to the raw material.…”

Waste Strategies Development in the Framework of Circular Economy

“…Olive mill wastes received huge attention due to the high waste volumes, mainly due to their toxicity and their negative impacts on the environment [19,20]. The oil extraction process produces huge seasonal quantities of olive by-products that require noteworthy attention because of their high organic content and significant toxicity due to the phenolic substances with extremely vital environmental issues [21][22][23][24][25]. A promising strategic approach beside composting [21,22] is the thermal conversion of olive mill solid wastes and olive mill wastewaters into a rich nutrient biochar.…”

Mitigating soil water deficit using organic waste compost and commercial water retainer: a comparative study under semiarid conditions

“…This integrated organic waste recycling approach improves the physical properties of soils such as the structural stability and waterholding capacity, which reduces leaching below the rooting zone (Bortolotti et al 2018;Zoghlami et al 2020). In addition, the microbial degradation of the incorporated organic matter is a slow-release process for macro-and micronutrients to agricultural plants (Hadroug et al 2021;Mabrouk et al 2023). Simultaneously, this could significantly reduce the emission of greenhouse gases in case of organic waste landfilling (Christodoulou et al 2019;Huang et al 2022).…”