Evaluation of a classification method for biodegradable solid wastes using anaerobic degradation parameters

Zheng, Wei; Phoungthong, Khamphe; Lü, Fan; Shao, Li; He, Pinjing

doi:10.1016/j.wasman.2013.08.015

Cited by 90 publications

(44 citation statements)

References 21 publications

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confidence: 99%

Co-Substrating of Peanut Shells with Cornstalks Enhances Biodegradation by Pleurotus ostreatus

FN¹,

Yusuf²

2016

J Bioremed Biodeg

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IntroductionPeanut shells (PS) are abundant agro-industrial waste products that are recalcitrant to degradation under natural conditions [1]. The increasing expansion of peanut production has led to accumulation of large quantities of these shells all over the world. In the US alone, peanut production increased by 45% between 2011 and 2012, bringing production to 3.04 million metric tons [2]. Globally, 45.6 million metric tons of peanuts are produced annually [3]. It has been estimated that for every kg of peanuts produced, 230-300 g of peanut shells are generated [4]. Therefore, as much as 13.7 million metric tons of peanut shells are churned out every year, most of which are dumped into the environment or burned [5,6]. Peanut shells are a renewable resource that could be targeted for purposeful use in the food, feed, paper and bioenergy industries. However, as yet, few if any value-added uses exist for them [7].Over the years, various attempts to utilize peanut shells have been made. Small fractions were incorporated into animal feed, especially for cattle [8], while some authors have experimented on their use as dietary fiber for humans [9]. Other non-food research trials include uses in pulp production [10], feedstock for bioethanol production [11,12], particle board component [13], mulch and activated charcoal [7]. However, the major drawback to their use in large scale industrial operations is the high lignin content.Much like other agricultural lignocellulolysic biomass, peanut shells are composed mainly of lignin, cellulose and hemicellulose. Lignin, a complex polymer, is the most recalcitrant component of plant biomass [14] and binds tightly to, and provides a physical seal around, cellulose and hemicellulose [11,[15][16][17][18], thereby protecting them against attack by hydrolytic enzymes. The restricted bioavailability of these sugars and other components is thought to be largely physical, with lignin molecules reducing the surface area available to enzymatic penetration and activity [19]. In order to gain access to the sugars in cellulose and AbstractWorld consumption of peanuts has increased tremendously, resulting in abundance of peanut shell waste. The high lignin content of peanut shells limits their bioconversion to useful products or recycling. Therefore, the synergy in co-substrating peanut shells (PS) and cornstalks (CS) to enhance biodegradation was evaluated. Various compositions of peanut shells and cornstalks (% dry weight) herein called co-substrate -90PS:10CS, 75PS:25CS, 50PS:50CS, 25PS:75CS, 10PS:90CS, and two controls Cont1-100PS and Cont2-100CS were studied under solid state fermentation (SSF) with a white rot fungus, Pleurotus ostreatus for 120 days. A two-factorial experiment in a completely randomized design (CRD) was used. Results showed that substrate composition and fermentation time were important variables in substrate degradation. Lignin degradation, losses in organic matter, cellulose and hemicellulose increased with time. Increasing the composition of CS in co-substrates...

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confidence: 99%

Co-Substrating of Peanut Shells with Cornstalks Enhances Biodegradation by Pleurotus ostreatus

FN¹,

Yusuf²

2016

J Bioremed Biodeg

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“…Conclusão semelhante foi feita por Vaidya (2002). O tamanho dos resíduos (DAMSIR, 2015) e sua composição (ZHENG et al, 2013) também influenciam a decomposição de resíduos em lisímetros.…”

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Estudo do Processo de Degradação de Resíduos Sólidos Orgânicos (Restos de Alimentos) em Lisímetro de Pequeno Porte

Santos

Matos

2017

cnx

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Resumo. O objetivo desta pesquisa foi estudar o processo degradativo de resíduos orgânicos (especificamente restos de alimentos) por meio do monitoramento da temperatura, geração de lixiviado e recalques em lisímetros de pequeno porte. O experimento envolveu a utilização de dois tambores metálicos de 200 litros cada, preenchidos com 150 Kg de restos de alimentos e devidamente equipados para medição dos três parâmetros escolhidos. No lisímetro 1, a maior temperatura interna foi 42,7 o C e a menor foi 24,4 o C. No lisímetro 2, a maior temperatura foi 45,7 o C e a menor 25,7 o C. A frequência de temperaturas internas maiores que as externas ocorreram predominantemente no meio do período de monitoramento, ficando claro que a massa de resíduos passou por três fases de degradação: primeira (ajuste inicial), segunda (degradação ativa) e terceira (maturação). O lisímetro 1 gerou 11.265 mL de lixiviado enquanto que o lisímetro 2 gerou 13.751 mL. O lisímetro 1 gerou aproximadamente 0,075 litros (L) de lixiviado por quilograma (Kg) de resíduo (restos de alimentos). O lisímetro 2 gerou aproximadamente 0,092 L/Kg. Na primeira semana do monitoramento os lisímetros 1 e 2 apresentaram recalques (média de cinco medições) de 6,3 e 7,4 cm, respectivamente. Na última semana, os recalques foram 12,5 cm (lisímetro 1) e 17,3 cm (lisímetro 2), sendo mais bruscos no início do monitoramento, concordando com a literatura. Os resultados permitiram concluir que o experimento se mostrou adequado, de baixo custo e sensível para medição dos processos físicos relacionados à degradação dos restos de alimentos, permitindo entender, de certa forma, o que ocorre nos aterros sanitários.Palavras-chaves: Resíduos sólidos. Resíduos orgânicos. Degradação de resíduos orgânicos. Lisímetros.Abstract. The purpose of this work was to study the degradation process of organic waste (food waste) by monitoring the temperature, leachate generation and settlements measured with small-sized lysimeters. The experiment involved the use of two 200-liter metal drums filled with 150 kg of food waste and duly equipped to measure the three chosen parameters. The highest temperature measured by lysimeter 1 was 42.7 o C and the lowest 24.4 o C. The highest temperature measured by lysimeter 2 was 45.7 o C and the lowest was 25.7 o C. The frequency of internal temperatures higher than external temperatures occurred predominantly in the middle of the monitoring period, while it is clear that the waste has gone through three different degradation stages: a first stage (initial setting), a second stage (active degradation) and a third stage (maturation). Lysimeter 1 generated 11,265 ml of leachate while lysimeter 2 generated 13,751 ml. Lysimeter 1 generated approximately 0.075 liters (L) of leachate per kilogram of waste (food scraps), while Lysimeter 2 generated approximately 0.092 L/kg. In the first monitoring week, lysimeters 1 and 2 showed a settlement (mean of five measurements) of 6.3 and 7.4 cm, respectively. In the last week, the settlements were 12.5 cm (Lysimeter 1...

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“…The natural degradation of sawdust is very slow and it is a waste of low use nowadays. Its storage is creating serious pollution problems in the soils in which it is settled [3][4][5][6]. Because it occupies a lot of space, sawdust causes considerable environmental problems.…”

Section: Intoductionmentioning

confidence: 99%

“…The lignin, after the cellulose, is the principal component of wood. The importance of the degradation of the lignin is owed to the fact that this substance is completely indigestible for the ruminant bacteria and can cause an increase in the intestinal diseases, since its digestion requires the presence of oxygen [9][10][11]. The excess of fiber reduces the capacity of food ingestion, the synthesis of ruminal microbial protein, the digestibility of the ration and the energy supply [12].…”

Section: Intoductionmentioning

confidence: 99%

Formulation and preparation method of pine sawdust-based food for rumiants

2018

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Abstract. The waste products of the wood industries, particularly pine sawdust, represent a great potential source of dietary energy for ruminants. Even though the use of pine sawdust as part of a ruminant's diet represents an important environmental impact, studies on this subject are scarce. It is worth mentioning that pine sawdust is currently being used as a source of fibre in ovine diet. However, its digestion is limited due to its high lignin content. The objective of the present investigation consists in the design of a new treatment process for lignin degradation into pine sawdust through the use of the fungus Pleurotus ostreatus. From the results obtained, a new and sustainable food for the ruminants based on degraded pine sawdust is proposed. The experiments carried out showed significant elevation in the exploitation of the nutritious components of pine sawdust contained in the developed product due to the improvements in the digestive parameters of the ruminants. With the results obtained, besides the nutritional and environmental impact, a better control of the costs generated by the feeding of the ruminants is intended. This is due to the fact that pine sawdust does not suffer from production variation in comparison with other consumables.

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Evaluation of a classification method for biodegradable solid wastes using anaerobic degradation parameters

Cited by 90 publications

References 21 publications

Co-Substrating of Peanut Shells with Cornstalks Enhances Biodegradation by Pleurotus ostreatus

Co-Substrating of Peanut Shells with Cornstalks Enhances Biodegradation by Pleurotus ostreatus

Estudo do Processo de Degradação de Resíduos Sólidos Orgânicos (Restos de Alimentos) em Lisímetro de Pequeno Porte

Formulation and preparation method of pine sawdust-based food for rumiants

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