Influence of N-rich material in valorization of industrial eggshell by co-composting

Soares, Micaela A.R.; Quina, Margarida J.; Quinta‐Ferreira, Rosa M.

doi:10.1080/09593330.2016.1164251

Cited by 9 publications

(2 citation statements)

References 61 publications

(73 reference statements)

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“…13 The role of these shells in compost as a stabilizing agent is well known as it provides negatively charged components like carbonates and glycosaminoglycans. 14 Rice husk is abundantly produced in rice mills of China and other riceproducing countries enhance the composting process as additive. 15 Another study had explained how the particle-size distribution influences bulk density, the permeability of compost to water and air, and compost maturity.…”

Section: Components Of Compostingmentioning

confidence: 99%

Microbial Activity during Composting and Plant Growth Impact: A Review

Rath¹,

Das²,

Pattanaik³

2022

J. Pure Appl. Microbiol.

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Replacing harmful chemical pesticides with compost extracts is steadily gaining attention, offering an effective way for plant growth enhancement and disease management. Food waste has been a major issue globally due to its negative effects on the environment and human health. The methane and other harmful organisms released from the untreated waste have been identified as causes of this issue. Soil bacteria impart a very important role in biogeochemical cycles. The interactions between plants and bacteria in the rhizosphere are some of the factors that determine the health and fertility of the soil. Free-living soil bacteria are known to promote plant growth through colonizing the plant root. PGPR (Plant Growth Promoting Rhizobacteria) inoculants in compost are being commercialized as they help in the improvement of crop growth yield and provide safeguard and resistance to crops from disease. Our focus is to understand the mechanism of this natural, wet waste recycling process and implementation of a sustainable operative adaptation with microbial association to ameliorate the waste recycling system.

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Section: Components Of Compostingmentioning

confidence: 99%

Microbial Activity during Composting and Plant Growth Impact: A Review

Rath¹,

Das²,

Pattanaik³

2022

J. Pure Appl. Microbiol.

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“…Composting is a process that can be implemented and controlled on the lab scale, industrial scale, as well as domestic scale [26,27]. Continuous monitoring of different parameters is essential (mainly at lab and industrial scales) to ensure the adequate operation of the composting process, such as temperature, aeration, moisture, and oxygen uptake rate [21,28]. However, domestic composting presents additional challenges, such as the fact that society is unaware of the basic aspects of this process and its purpose.…”

Section: Introductionmentioning

confidence: 99%

Composting of Biowaste Generated in University Canteens and Rural Households: Converting Waste into a Valuable Product

Baptista,

Rodrigues,

Quina

2024

Sustainability

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The growing production of biowaste is causing serious environmental concerns, and composting has emerged as an environmentally friendly solution. This approach contributes to the real circular economy of biowaste, avoiding landfill disposal. This process is flexible as it can be carried out on a domestic or industrial scale. This work focused on the formulation and monitoring of two different composting processes (on a laboratory and domestic scale), to recover biowaste from a university canteen and a rural household, as well as evaluating the quality of the final composts. Three different mixtures of canteen food waste (CFW) and olive wood chips (OWC) were tested at lab scale (CFW:OWC 100:0, 40:60, and 60:40%), with two replicates carried out on the second mixture; a single mixture was tested at the domestic experiment (40:60%). The results showed that both processes reached thermophilic temperatures, with a peak of 65 °C on the lab scale and 75 °C recorded in the domestic composting. Reaching thermophilic temperatures is essential in composting, to maximize the rate of organic matter (OM) decomposition and improve compost quality (e.g., stability and maturation). The moisture content (MC) of biowaste proved to be a critical parameter since the high MC of CFW led to the inhibition of the aerobic process in the mixture without OWC (100% of CFW). On the contrary, a large quantity of OWC (60:40%) showed lower biodegradability due to the presence of lignocellulosic compounds. Analysis of the quality of the final compost revealed that although domestic composting was a process with a low level of control, it allowed obtaining quality compost for agronomic applications, similar to that produced on a laboratory scale. All final composts (after 120 days) were stable and mature, according to the oxygen uptake rate (OUR) and the germination index (GI). Indeed, OUR complied with the regulatory limits (15 and 25 mmolO2/kgOM.h) to be considered soil correctives or organic fertilizers, evidencing the stability of the materials. All composts are non-phytotoxic (GI above 80%), meaning that they are suitable for plant growth. The composts produced retained a significant amount of carbon (40–70%), with a high value for returning carbon to the soil in stable OM forms. Thus, when applied to the soil, a significant amount of carbon is carried to this compartment, making a valuable contribution to closing the carbon cycle and avoiding the emission of CO2 into the atmosphere. Overall, it was possible to conclude that biowaste from university canteens and households can be recovered by composting, as long as it is mixed with a bulking agent (such as OWC), which promotes the process and improves the properties of the composts.

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