Research on the Hydrolysis of Hide Waste in the Presence of Natural Polymers

Zainescu, Gabriel; Hanu, Andreea; Constantinescu, Rodica Roxana; Deselnicu, Dana Corina

doi:10.24264/icams-2016.iv.14

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…However, these wastes were underutilized and often burned in open field, thus causing heavily environmental pollution. The recovery of waste is of particular interest to the extent that it allows the disposal of waste by obtaining quality products economically [1]. Accordingly, the use of agricultural wastes for fabrication of value-added materials seems very attractive and promising from environmentally and economically viable view.…”

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confidence: 99%

Optimization of the Activated Carbon Preparation from Avocado Seeds, using the Response Surface Methodology

Fregue¹,

Ionel²,

Gabche³

et al. 2019

Rev. Chim.

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Avocado seeds based activated carbon was prepared using chemical activation method which consisted of potassium hydroxide treatment. The main factors influencing the preparation of activated carbons at the calcination temperature, the concentration of the activating agent and the duration of calcination were investigated. One used as a mathematical model the response surface methodology to correlate the response. The significant factors identified by the analysis of variance (ANOVA) through the t-test, the Pareto diagram and the diagrams of surfaces. The optimum avocado seeds based activated carbon was obtained by using calcination temperature of 450 oC, concentration of activating agent of 0.3 mol/L and time of calcination of 3.0 h, which resulted to an avocado seed based activated carbon iodine number remove of 1142.1 mg/g and yield of 75.09 %, by mass. The best activated carbon obtained under the previous conditions and the raw biomass was characterized by Fourier transform infrared and Scanning Electronic Microscope.

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confidence: 99%

Optimization of the Activated Carbon Preparation from Avocado Seeds, using the Response Surface Methodology

Fregue¹,

Ionel²,

Gabche³

et al. 2019

Rev. Chim.

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“…These fertilizers have a complex composition containing, in addition to nitrogen, other macronutrients, such as phosphorus and potassium, that can be introduced by mixing, but also micronutrients absolutely necessary in plant growth and development. They also have a high carbon content in biodegradable organic compounds, that can grow soil fertility [82][83][84][85].…”

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confidence: 99%

Review of Soil Quality Improvement Using Biopolymers from Leather Waste

et al. 2022

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This paper reviews the advantages and disadvantages of the use of fertilizers obtained from leather waste, to ameliorate the agricultural soil quality. The use of leather waste (hides and skins) as raw materials to obtain biopolymer-based fertilizers is an excellent example of a circular economy. This allows the recovery of a large quantity of the tanning agent in the case of tanned wastes, as well as the valorization of significant quantities of waste that would be otherwise disposed of by landfilling. The composition of organic biopolymers obtained from leather waste is a rich source of macronutrients (nitrogen, calcium, magnesium, sodium, potassium), and micronutrients (boron, chloride, copper, iron, manganese, molybdenum, nickel and zinc), necessary to improve the composition of agricultural soils, and to remediate the degraded soils. This enhances plant growth ensuring better crops. The nutrient release tests have demonstrated that, by using the biofertilizers with collagen or with collagen cross-linked with synthetic polymers, the nutrient release can be controlled and slowed. In this case, the loss of nutrients by leaching into the inferior layers of the soil and ground water is minimized, avoiding groundwater contamination, especially with nitrate.

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“…The non-edible and low cost lipids could be used as a feedstock for biodiesel production [7] and the lipids could be extracted from biomass using Bligh and Dyer, Folch and Soxhlet extraction methods [8]. The extraction efficiency could be improved by disrupting the biomass prior to extraction by autoclaving, sonication, micro-wave irradiation, surfactants and enzymes [9].…”

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confidence: 99%

Bio-agent de retanare utilizat in procesarea pieilor si procedeu de obtinere

Constantinescu¹,

Zainescu²,

Crudu³

et al. 2019

Rev.Chim.

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Currently, the leather industry has to deal with very high costs for waste treatment and disposal. As a result, it is recommended to subject the organic protein waste from tanning to biochemical treatments for recycling in the industry. The degree of novelty lies primarily in the fact that the starting point of the promoted technologies is obtaining new complex products by processing organic waste and using it in tanneries. The lime fleshings resulting from the hide fleshing operation represents the highest amount of reusable leather material of approx. 25%. This paper presents an innovative process for the biochemical degradation of hide waste resulting from hide fleshing in order to obtain a retanning/filling agent used in leather processing.

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Research on the Hydrolysis of Hide Waste in the Presence of Natural Polymers

Cited by 4 publications

References 6 publications

Optimization of the Activated Carbon Preparation from Avocado Seeds, using the Response Surface Methodology

Optimization of the Activated Carbon Preparation from Avocado Seeds, using the Response Surface Methodology

Review of Soil Quality Improvement Using Biopolymers from Leather Waste

Bio-agent de retanare utilizat in procesarea pieilor si procedeu de obtinere

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