Recycling nutrient-rich hop leaves by composting with wheat straw and farmyard manure in suitable mixtures

Afonso, Sandra; Arrobas, Margarida; Pereira, Ermelinda; Rodrigues, M. Ângelo

doi:10.1016/j.jenvman.2021.112105

Cited by 31 publications

(30 citation statements)

References 26 publications

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“…A study of continuously thermophilic composting [32] was conducted in an incubator, to determine the effect of temperature impact on the bacterial species diversity. The experiment concluded that a high species diversity is needed for proper bacterial population stability and metabolic versatility, while the maximum desirable temperature for continuously thermophilic composting is found to be maximum 60 • C. In order to reduce composting time and increase the quality of the compost, the ratio between leaves and straw should be as high as possible, at least 2:1 [33], alternatively the composting process will take longer. The poorly-matured compost has to be applied far in advance of cultivating a crop to allow for supplementary biological activities in the soil [34,35].…”

Section: Main Findings and Concerns Related To Composting Processesmentioning

confidence: 99%

Decentralized Processing Performance of Fruit and Vegetable Waste Discarded from Retail, Using an Automated Thermophilic Composting Technology

Nenciu

Stanciulescu²,

Vlad³

et al. 2022

Sustainability

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Food waste generation is increasing at an exponential rate, affecting the environment, food security, and causing major economic issues worldwide. The main aim of the current research is to investigate a novel composting technology that is still in its early stages of development. The proposed composting technology combining thermophilic composting with the use of advanced automated processing reactors. Starting from a qualitative and quantitative analysis of the waste generated at retail-stores, the most significant difficulties associated to waste management as well as the main characteristics of the discarded waste were identified. The findings allowed to design and evaluate the real operating performance of an automated thermophilic composting prototype (working in a decentralized regime), with the goal of delivering a faster processing system, improving operational efficiency, reducing expenses, and lowering environmental impacts. The proposed operating technique showed a high capacity for pathogens and seeds removal, the waste input mass reduction of 88%, and efficiency in food processing (2235 kg of fruits and vegetables in a 14-days timeframe).

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Section: Main Findings and Concerns Related To Composting Processesmentioning

confidence: 99%

Decentralized Processing Performance of Fruit and Vegetable Waste Discarded from Retail, Using an Automated Thermophilic Composting Technology

Nenciu

Stanciulescu²,

Vlad³

et al. 2022

Sustainability

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“…The European Union (2012) encourages the use of bio-waste in agriculture as it improves soil condition and provides valuable nutrients to plants [43]. Composting is one of the most effective processes used in recycling organic waste, applicable to soils as organic amendment [30].…”

Section: Balance In Economy and Environmentmentioning

confidence: 99%

An Optimization Scheme of Balancing GHG Emission and Income in Circular Agriculture System

Sheng

Jing

et al. 2021

Sustainability

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With the rapid development of circular agriculture in China, balancing agricultural income and environmental impact by adjusting the structure and scale of circular agriculture is becoming increasingly important. Agriculture is a major source of greenhouse gas and income earned from agriculture drives sustainable agricultural development. This paper built a multi-objective linear programming model based on greenhouse gas emission and agricultural product income and then optimized the structure and scale of circular agriculture using Beiqiu Farm as a case study. Results showed that greenhouse gas emission was mainly from manure management in livestock industry. While the agriculture income increased by 64% after optimization, GHG emission increased by only 12.3%. The optimization made full use of straw, manure and fodder, but also minimized soil nitrogen loss. The results laid a generalized guide for adjusting the structure and scale of the planting and raising industry. Measures for optimizing the management of manure were critical in achieving low agricultural carbon emissions in future agricultural development efforts.

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“…Though the organic composting materials can be encountered to substantial changes by high temperatures which are generated during the compost-producing process [12], only a few studies have investigated whether the allelopathic efficacy of plant tissue is affected by the thermal process. Furthermore, most researchers have mainly focused on compost values as nutritional suppliers to crops [13][14][15]. Instead, we tried to evaluate the allelopathic efficacy of volatile and non-volatile components in thermally processed needles.…”

Section: Introductionmentioning

confidence: 99%

Volatile and Non-Volatile Allelopathic Characteristics in Thermally Processed Needles of Two Conifers

Gil

Hong

Duan

et al. 2022

Plants

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With allelopathic composts, potential merits for preventing initial weed infestations have been observed in crop transplantation. However, previous studies have rarely investigated whether high temperatures, generated during composting, decrease allelopathic ability. This study evaluated the thermal allelopathic effect of two coniferous plants (Pinus densiflora and P. koraiensis) on Brassica napus germination and seedling growth using their characterized allelochemical destinations. The 90 °C dry treatment of P. densiflora extract exhibited stronger inhibitory effect on germination than its 30 °C dry treatment. In a range from 0.25 to 1 mg mL−1, the germination rate was decreased to 38.1 and 64.3% of control with P. densiflora extract dried at 90 and 30 °C, respectively. However, P. koraiensis showed potent inhibition of the germination process with no statistical difference in inhibitory effects regardless of the dry temperature. Regarding B. napus seedling root growth, the allelopathic effects of aqueous extracts of both conifers were not reduced with the 90 °C treatment, but it was lost in seedling shoot growth. GC-MS/MS confirmed that high temperature treatment drastically decreased volatile contents to 53.2% in P. densiflora, resulting in reduced allelopathic abilities. However, a relatively lower decrease to 83.1% in volatiles of P. koraiensis accounts for less loss of the root-specific inhibitory effect on B. napus seedlings even after 90 °C treatment. Foliar tissues of both conifers with species-specific thermal resistance have potentially valuable functions regarding allelopathic use in horticultural compost processing ingredients, demonstrating their weed control ability during the early cultivation season where crops are transplanted in the facilitated area.

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Recycling nutrient-rich hop leaves by composting with wheat straw and farmyard manure in suitable mixtures

Cited by 31 publications

References 26 publications

Decentralized Processing Performance of Fruit and Vegetable Waste Discarded from Retail, Using an Automated Thermophilic Composting Technology

Decentralized Processing Performance of Fruit and Vegetable Waste Discarded from Retail, Using an Automated Thermophilic Composting Technology

An Optimization Scheme of Balancing GHG Emission and Income in Circular Agriculture System

Volatile and Non-Volatile Allelopathic Characteristics in Thermally Processed Needles of Two Conifers

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