Although nutrient-rich manure biochars are expected to be an effective heavy metal stabilizer in agricultural and contaminated soils, systematic studies are lacking to predict the influence of manure variety and pyrolysis temperature on metal-binding potentials. In this study, biochars produced from five manure varieties (dairy, paved feedlot, swine solids, poultry litter, and turkey litter) at...

Interest in biochar stems from its potential agronomic benefits and carbon sequestration ability. Biochar application alters soil nitrogen (N) dynamics. This review establishes emerging trends and gaps in biochar-N research. Biochar adsorption of NO3, up to 0.6 mg g biochar, occurs at pyrolysis temperatures >600 °C with amounts adsorbed dependent on feedstock and NO3 concentration. Biochar NH4 ...

Pig farming produces more manure than can reasonably be spread onto surrounding fields, particularly in regions with high livestock densities and limited land availability. Nutrient recycling offers an attractive solution for dealing with manure excesses and is one main objective of the European commission-funded project “BioEcoSIM”. Phosphate salts (“P-Salt”) were recovered from the separated ...

While pyrolysis of livestock manures generates nutrient-rich biochars with potential agronomic uses, studies are needed to clarify biochar properties across manure varieties under similar controlled conditions. This paper reports selected physicochemical results for five manure-based biochars pyrolyzed at 350 and 700°C: swine separated-solids; paved-feedlot manure; dairy manure; poultry litter;...

The occurrence and distribution of polycyclic aromatic hydrocarbons (PAH) have been investigated in the products derived from pyrolysis pig manure at low temperatures (<550 °C) a fixed bed reactor. focus was on sixteen PAH identified as priority pollutants by US Environment Protection Agency (EPA). does not generate significant additional amount EPA-PAH to that existing original manure, under o...

Here we studied how the transit through the gut of the earthworm Eisenia fetida affects the microbial and nutrient stabilization of pig and cow manure, by analyzing fresh casts. Earthworms reduced the pools of dissolved organic C and N in casts from both types of manure, as wells as mineral N. Microbial biomass was enhanced only in casts from pig manure and did not change in casts from cow manu...

Field investigations are important tools for confirmation of the effectiveness of the organic manures on crop yield. As different N sources, this work presents a comparative study of the effects of urea, cow dung and poultry manure on plant height, stem length and diameter, leaf length, breadth and number accompanied with the fresh weight of plant, stem, leaf coupling stem leaf ratio and gross ...

Vertisol has a clay texture, high micropores, and water nutrient absorption ability. The content of causes the air to decrease, thus inhibiting root development. Stretching structure is expected increase soil porosity reduce ion absorption. This study examines interactions between organic matter percent sand on availability. was arranged according factorial Completely Randomized Design (CRD), r...

As a potential adsorbent material, loose, porous livestock manure biochar provides new approach to resource utilization. In this study, coconut husks (CH) and manure, i.e., cow dung (CD), pig (PM), chicken (CM) were used as biomass precursors for preparation of via high-temperature pyrolysis CO2 activation. Characterization technologies, such scanning electron microscopy, Fourier transform infr...

Intensified cultivation of rice has accelerated weathering most tropical acid soils leading to significant loss base cations. In developing countries, yield is low and this results in its production being costly because productivity versus labor low. The objectives study were (i) enhance soil chemical properties, nutrient uptake, grain grown on a mineral using agro-wastes; (ii) determine the ag...