Model of Anaerobic Bio-Hydrogenation in Sustainable Agricultural Waste Treatment

2004 ◽  
Author(s):  
Li Wang ◽  
Suzelle Barrington ◽  
Saleh Kaoser and Jin-Woo Kim
Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 39 ◽  
Author(s):  
Wei Ling Chow ◽  
Siewhui Chong ◽  
Jun Wei Lim ◽  
Yi Jing Chan ◽  
Mei Fong Chong ◽  
...  

Anaerobic digestion has been widely employed in waste treatment for its ability to capture methane gas released as a product during the digestion. Certain wastes, however, cannot be easily digested due to their low nutrient level insufficient for anaerobic digestion, thus co-digestion is a viable option. Numerous studies have shown that using co-substrates in anaerobic digestion systems improve methane yields as positive synergisms are established in the digestion medium, and the supply of missing nutrients are introduced by the co-substrates. Nevertheless, large-scale implementation of co-digestion technology is limited by inherent process limitations and operational concerns. This review summarizes the results from numerous laboratory, pilot, and full-scale anaerobic co-digestion (ACD) studies of wastewater sludge with the co-substrates of organic fraction of municipal solid waste, food waste, crude glycerol, agricultural waste, and fat, oil and grease. The critical factors that influence the ACD operation are also discussed. The ultimate aim of this review is to identify the best potential co-substrate for wastewater sludge anaerobic co-digestion and provide a recommendation for future reference. By adding co-substrates, a gain ranging from 13 to 176% in the methane yield was accomplished compared to the mono-digestions.


2017 ◽  
Vol 3 (1) ◽  
pp. 108-117
Author(s):  
Sulmiyati Sulmiyati ◽  
Nur Saidah Said

The problems faced by farmers in Galung Lombok Village is knowledge in the in the processing of goat livestock manure and waste of hazelnut shell. The solution that can be offered is waste treatment into bio-charcoal briquettes. The community engagement is to introduce community or partners of Community Partnership Program (CPP) in processing livestock manure and agricultural waste into charcoal briquettes as an alternative solution to the problems faced by society and become an alternative business potential that can be developed by farmers. The methods applied in overcoming these problems are through interactive counseling, training with the demonstration of bio-charcoal briquette processing, guidance and mentoring into ready to market products. The results of the dedication activities were held on 13-14 May 2017 at the meeting hall of Siamasei Farmer Group of Galung Lombok Village, Tinambung, Polewali Mandar. This activity is carried out by conducting participatory counseling coupled with demonstrations of processed briquettes from goat manure and hazelnut shell, packaging, and testing of briquette quality. The conclusion that goat livestock manure can be processed into bio-charcoal briquettes through seven stages: drying of raw materials, refining, reducing and filtering, adhesive mixing, printing, drying and packaging. The quality of briquettes produced,the moisture content of 5.58%, ash content of 23.93%, volatile matter of 35.16%, fixed carbon of 35.33%, and calories 4,563 cal/gr.


2021 ◽  
Vol 10 (1) ◽  
pp. 499-506
Author(s):  
Jia Shao ◽  
Kai Deng ◽  
Le Chen ◽  
Chaomeng Guo ◽  
Congshan Zhao ◽  
...  

Abstract Low density polyethylene is widely used in agricultural production. It is of low cost and able to significantly improve the quality of fruits. However, its decomposition under natural circumstances needs more than one hundred of years. If not removed in time, it is hazardous to the ecological environment and crops. Up to now, the removal techniques of polyethylene films are polluted, expensive, and difficult to employ. A novel method is proposed for in situ removal of polyethylene by an effective and environmental friendly technique with low cost. The Nb-modified SnO2 quantum dots are prepared for the efficient photocatalytic degradation of polyethylene under visible light. The green synthesis of the photocatalyst includes the procedures of hydrolysis, oxidation, and hydrothermal treatment in aqueous solution. The Nb-modified SnO2 has a band gap of 2.95 eV, which enhances its absorption of visible light. A degradation efficiency of 29% is obtained within 6 h under visible irradiation. The hydroxyl radicals (•OH) are main active species in the degradation process. The prepared Nb-SnO2 quantum dots demonstrate a promising application in the photocatalytic degradation of polyethylene, contributing a novel strategy for the in situ treatment of agricultural wastes.


2021 ◽  
Author(s):  
Hons K Wyn ◽  
Muxina Konarova ◽  
Greg Perkins ◽  
Luis Yermán

Abstract Smouldering combustion has shown to be an effective application for soil remediation and as a waste treatment method for solids with high moisture content. The experimental set-up of smouldering combustion reactors is similar to autothermal fixed-bed gasification, updraft reactor configuration. In this study, smouldering experiments were conducted using lignocellulosic agricultural waste. The moisture content of lignocellulosic biomass was varied between 10 % to 50 %. Air flux was varied between 1.8 and 7.4 cm/s. Experiments were also conducted with varying oxygen concentration in the airflow (3.6 – 21 %), addition of sand (4 and 8 g/g) and other lignocellulosic material (wood pellets, and residual berry plant). Fuel gas with maximum H2, CO, CH4, CO2 concentrations of 7.7, 32.6, 2.3, and 57.4 % (N2 free) respectively were obtained with 10 % moisture content and 7.4 cm/s air flux. The smouldering yielded 1.24 Nm3/kgfeed_dry of gas with calorific value of 1.82 MJ/Nm3 (HHV).


2017 ◽  
Vol 62 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Isaac Adejumo ◽  
Charles Adetunji ◽  
Oluyomi Adeyemi

The wild and mutant strain of Pleurotus sajor caju was cultured on different agricultural substrates. Treatment 1 contained agricultural substrates alone. Treatment 2 contained the mutant strain of the mushroom plus agricultural waste. Treatment 3 contained the wild strain of the mushroom plus agricultural waste. The mutant strain of Pleurotus sajor caju cultured on groundnut shell had the highest iron content while the mutant strain cultured on palm kernel meal had the highest biomass production, 10.5 g/L and 17.20 g/L after 7 and 14 days respectively. The proximate analyses of the feed variety (mycomeat) revealed the rich nutritional content which may be explored for feed ingredients in livestock production. The findings do not only support the bioremediation of agricultural waste to produce high-value bio-products, but also provide evidence that improvement of microorganism strains represents a viable way to enhance the nutritional value of fermented products.


2003 ◽  
Vol 48 (4) ◽  
pp. 199-203
Author(s):  
M. Sankar ◽  
T.S. Chandra

A detailed analysis was made of chemical fractions of common agro-residues before and after pretreatment (alkali and hydrogen peroxide), and the selective utilization of components such as WSS, EBS, TSS, lignin, cellulose and hemicellulose by pure and mixed cultures of cellulolytic and xylanolytic Clostridia was monitored and correlated with the organisms' enzyme activity. For all cultures pretreatment gave higher utilization of hemicellulose and cellulose fractions; hydrogen peroxide pretreatment was more effective than NaOH treatment. Lignin utilization was not very significant even on pretreatment. C.TM1 and C.SA IV utilized hemicellulose and cellulose better than mixed cultures in selected substrates. These results help to determine the substrate composition, pretreatment conditions and enzyme system of the organism needed when designing an inoculum for agricultural waste treatment processes such as composting or biogas generation.


Fermentation ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 169
Author(s):  
Soumya Pandit ◽  
Nishit Savla ◽  
Jayesh M. Sonawane ◽  
Abubakar Muh’d Sani ◽  
Piyush Kumar Gupta ◽  
...  

In recent years, there has been a significant accumulation of waste in the environment, and it is expected that this accumulation may increase in the years to come. Waste disposal has massive effects on the environment and can cause serious environmental problems. Thus, the development of a waste treatment system is of major importance. Agro-industrial wastewater and waste residues are mainly rich in organic substances, lignocellulose, hemicellulose, lignin, and they have a relatively high amount of energy. As a result, an effective agro-waste treatment system has several benefits, including energy recovery and waste stabilization. To reduce the impact of the consumption of fossil energy sources on our planet, the exploitation of renewable sources has been relaunched. All over the world, efforts have been made to recover energy from agricultural waste, considering global energy security as the final goal. To attain this objective, several technologies and recovery methods have been developed in recent years. The microbial fuel cell (MFC) is one of them. This review describes the power generation using various types of agro-industrial wastewaters and agricultural residues utilizing MFC. It also highlights the techno-economics and lifecycle assessment of MFC, its commercialization, along with challenges.


2018 ◽  
Vol 24 (12) ◽  
pp. 9502-9504
Author(s):  
Anggun Puspitarini Siswanto ◽  
Dmitriy Kuvshinov ◽  
Jagroop Pandhal ◽  
William Zimmerman

Sign in / Sign up

Export Citation Format

Share Document