Management of banana crop waste biomass using vermicomposting technology

2021 ◽  
Vol 326 ◽  
pp. 124742
Author(s):  
Monika Mago ◽  
Anoop Yadav ◽  
Renuka Gupta ◽  
V.K. Garg
Keyword(s):  
Waste Biomass ◽  
Crop Waste ◽  
Banana Crop

scholarly journals Agroindustry Residues as a Source for Cellulose Nanofibers Production

2021 ◽  
Author(s):  
Mayra Mariño ◽  
Daniela Cypriano ◽  
Ljubica Tasic
Keyword(s):  
Crop Residues ◽  
Alkali Treatment ◽  
Cellulose Nanofibers ◽  
Value Added ◽  
Raw Material ◽  
Sodium Chlorite ◽  
Waste Biomass ◽  
Sugarcane Straw ◽  
Coffee Residues ◽  
Crop Waste

Our study was motivated by the large amount of crop residues produced in Brazil, which represent underutilized waste biomass and a serious threat to the environment because of the landfilling. For example, even though the corn crop is not popular in Brazil, it is produced in the area of around 18-20 million hectares with an average production of 5-6 t ha-1. That is the reason to seek for the crop residues value-added applications as proposed in the present study. Four Brazilian crop waste biomass: orange bagasse, corn husks, sugarcane straw and coffee residues were used for cellulose nanofibers (CNF) production. CNFs were prepared using alkali treatment, followed by bleaching with sodium chlorite and extraction with oxalic acid. All steps were applied under moderate conditions of temperature and pressure, such as temperature of 120 °C and below, water solutions with chemicals’ concentrations lower that 10% and short sonication pulses. CNFs with diameters in the range 50-70 nm were obtained and products from orange bagasse and corn husks presented high crystallinity indexes (CI), 0.72 and 0.75, respectively. The highest CNF yield was obtained from corn husks (38.5%) followed by sugarcane straw (24.0% with CI of 0.69). CNFs obtained from coffee residues showed a CI value of 0.65 after two bleaching steps. Different CNF morphologies were obtained according to the raw material. The four-crop waste biomass can be considered as excellent starting materials for CNF production in the four-steps process that adds new value to agro-industrial waste and might bring great economical valorization to Brazilian crops production.

SEQUESTRATION OF COPPER (II) FROM SIMULATED WASTEWATER USING PRE-TREATED RICE HUSK WASTE BIOMASS

2016 ◽  
Vol 15 (8) ◽  
pp. 1689-1703 ◽  
Author(s):  
Ackmez Mudhoo ◽  
Manjeet Bansal ◽  
Vinod Kumar Garg ◽  
Diwan Singh
Keyword(s):  
Rice Husk ◽  
Waste Biomass ◽  
Simulated Wastewater

scholarly journals Sewage Sludge Treatment by Hydrothermal Carbonization: Feasibility Study for Sustainable Nutrient Recovery and Fuel Production

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2697
Author(s):  
Gabriel Gerner ◽  
Luca Meyer ◽  
Rahel Wanner ◽  
Thomas Keller ◽  
Rolf Krebs
Keyword(s):  
Liquid Phase ◽  
Sewage Sludge ◽  
Hydrothermal Carbonization ◽  
Economic Feasibility ◽  
Phosphorus Recovery ◽  
High Yield ◽  
Nutrient Recovery ◽  
Waste Biomass ◽  
Sludge Treatment ◽  
Sewage Sludge Treatment

Phosphorus recovery from waste biomass is becoming increasingly important, given that phosphorus is an exhaustible non-renewable resource. For the recovery of plant nutrients and production of climate-neutral fuel from wet waste streams, hydrothermal carbonization (HTC) has been suggested as a promising technology. In this study, digested sewage sludge (DSS) was used as waste material for phosphorus and nitrogen recovery. HTC was conducted at 200 °C for 4 h, followed by phosphorus stripping (PS) or leaching (PL) at room temperature. The results showed that for PS and PL around 84% and 71% of phosphorus, as well as 53% and 54% of nitrogen, respectively, could be recovered in the liquid phase (process water and/or extract). Heavy metals were mainly transferred to the hydrochar and only <1 ppm of Cd and 21–43 ppm of Zn were found to be in the liquid phase of the acid treatments. According to the economic feasibility calculation, the HTC-treatment per dry ton DSS with an industrial-scale plant would cost around 608 USD. Between 349–406 kg of sulfuric acid are required per dry ton DSS to achieve a high yield in phosphorus recovery, which causes additional costs of 96–118 USD. Compared to current sewage sludge treatment costs in Switzerland, which range between 669 USD and 1173 USD, HTC can be an economically feasible process for DSS treatment and nutrient recovery.

scholarly journals Potential of Pre-Harvest Wastes of Tobacco (Nicotiana tabacum L.) Crops, Grown for Smoke Products, as Source of Bioactive Compounds (Phenols and Flavonoids)

2021 ◽  
Vol 13 (4) ◽  
pp. 2087
Author(s):  
Maria Isabella Sifola ◽  
Linda Carrino ◽  
Eugenio Cozzolino ◽  
Luisa del Piano ◽  
Giulia Graziani ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Dry Weight ◽  
Waste Biomass ◽  
Total Polyphenols ◽  
Nicotiana Tabacum L ◽  
Diammonium Salt ◽  
Q Exactive ◽  
Tobacco Cultivation ◽  
Folin Assay ◽  
Final Harvest

Tobacco cultivation is characterized by high amounts of waste biomasses whose disposal frequently represents a complex and expensive problem. A study was conducted to evaluate thepotential of pre-harvest light air-cured (Burley) and dark fire-cured (Kentucky) tobacco waste biomasses as a source of bioactive compounds (nutraceutical ingredients) such as polyphenols. Pre-harvest waste materials (topping fresh materials and residual stalks at final harvest) were collected to determine dry matter, total polyphenols content (TPC; Folin assay), and DPPH (2,2-diphenyl-1-picrylhydrazyl) and ABTS (2,20-azino-bis(3-ethylbenzothiazoline-60-sulfonic acid) diammonium salt) antioxidant capacity. Polyphenols quali-quantitative profiles obtained by Orbitrap Q Exactive of both tobacco types were also determined. Total pre-harvest waste biomass amounted to 3956.9 and 1304.4 kg d.w. ha−1 in light air-cured (Burley) and dark fire-cured (Kentucky) tobacco types, respectively. Polyphenols content, expressed as g kg−1 dry weight (d.w.), ranged between 4.6 and 15.7 g kg−1 d.w. and was generally greater in leaves than in stalks. Considering both leaves and stalks, the light air-cured (Burley) tobacco crop yielded 22.1 kg ha−1 of polyphenols, while the dark fire-cured (Kentucky) tobacco yielded 12.0 kg ha−1. DPPH and ABTS were significantly greater in leaves than in stalks waste biomass in both types of tobacco. The most abundant components were quinic and chlorogenic acids, rutin, and luteolin rutinoside.

Enrichment of hydrogen production from fruit waste biomass using ozonation assisted with citric acid

2021 ◽  
pp. 0734242X2110103
Author(s):  
Anbazhagan Sethupathy ◽  
Pushkar Kumar Pathak ◽  
Palani Sivashanmugam ◽  
Chelliah Arun ◽  
Jayakumar Rajesh banu ◽  
...  
Keyword(s):  
Citric Acid ◽  
Hydrogen Production ◽  
Suspended Solid ◽  
Net Energy ◽  
Waste Biomass ◽  
Acid Pretreatment ◽  
Disintegration Time ◽  
Fruit Waste ◽  
The Impact ◽  
Acid Dosage

In this study, the impact of ozonation abetted with the citric acid pretreatment (OZCAP) method on fruit waste was investigated for ameliorating hydrogen production. Initially, the ozonation pretreatment (OZP) method was performed by varying ozone (O3) dosage and disintegration time. At optimized conditions (O3 dosage (0.04 g/g suspended solid; SS) and disintegration time (40 minutes)), 17.6% of liquefied organics emancipate rate (LER) and 13.5% of SS reduction were perceived. Further augmenting LER of fruit waste, OZCAP method was proceeded by varying citric acid dosage and disintegration time at an optimized OZP dosage (0.04 g/g SS). A higher LER (24.4%) and SS reduction (19%) were described at an optimal citric acid dosage (0.03 g/g SS) and disintegration time (20 minutes). Then, the hydrogen production potential of OZCAP, OZP and raw fruit waste were evaluated in which OZCAP method exhibited a higher cumulative hydrogen production (30 mL/g volatile solids). Energy valuation reveals that OZCAP method exhibited a net energy of 3.7 kWh/kg of fruit waste.

scholarly journals Pyrolysis of agricultural waste biomass towards production of gas fuel and high-quality char: Experimental and numerical investigations

Fuel ◽  
2021 ◽  
Vol 296 ◽  
pp. 120611
Author(s):  
Agata Mlonka-Mędrala ◽  
Panagiotis Evangelopoulos ◽  
Małgorzata Sieradzka ◽  
Monika Zajemska ◽  
Aneta Magdziarz
Keyword(s):  
Agricultural Waste ◽  
Waste Biomass ◽  
High Quality ◽  
Numerical Investigations ◽  
Gas Fuel

Synthesis of high surface area and functionalized nanoporous biocarbons and their efficiency for CO2 capture and supercapacitors

2021 ◽  
Author(s):  
Gurwinder Singh ◽  
Rohan Bahadur ◽  
Ajanya Maria Ruban ◽  
Jefrin Marykala Davidraj ◽  
Dawei Su ◽  
...  
Keyword(s):  
Energy Storage ◽  
Surface Area ◽  
Co2 Capture ◽  
Water Purification ◽  
High Surface ◽  
High Surface Area ◽  
Energy Storage And Conversion ◽  
Waste Biomass ◽  
Fabrication Technology ◽  
Significant Attention

Nanoporous biocarbons derived from waste biomass have created significant attention owing to their great potential for energy storage and conversion and water purification. However, the fabrication technology for these materials...

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