Liquid State Bioconversion of Domestic Wastewater Sludge for Bioethanol Production

Alam, Md. Zahangir; Kabbashi, Nassereldeen Ahmed; Razak, A A

doi:10.1007/978-3-540-68017-8_120

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…Alam et al [ 91 ] used sludge as the primary substrate to obtain ethanol by LSB with the yeast Saccharomyces cerevisiae . The results showed that after 48 h of processing, 9.8% ethanol was achieved.…”

Section: Biosolid Treatmentmentioning

confidence: 99%

Enzymatic Treatments for Biosolids: An Outlook and Recent Trends

Quintero-García

Pérez-Soler

Amezcua‐Allieri

2023

IJERPH

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Wastewaters are nutrient-rich organic materials containing significant concentrations of different nutrients, dissolved and particulate matter, microorganisms, solids, heavy metals, and organic pollutants, including aromatic xenobiotics. This variety makes wastewater treatment a technological challenge. As a result of wastewater treatment, biosolids are generated. Biosolids, commonly called sewage sludge, result from treating and processing wastewater residuals. Increased biosolids, or activated sludge, from wastewater treatment is a major environmental and social problem. Therefore, sustainable and energy-efficient wastewater treatment systems must address the water crisis and environmental deterioration. Although research on wastewater has received increasing attention worldwide, the significance of biosolids treatments and valorization is still poorly understood in terms of obtaining value-added products. Hence, in this review, we established some leading technologies (physical, chemical, and biological) for biosolids pretreatment. Later, the research focuses on natural treatment by fungal enzymes to end with lignocellulosic materials and xenobiotic compounds (polyaromatic hydrocarbons) as a carbon source to obtain biobased chemicals. Finally, this review discussed some recent trends and promising renewable resources within the biorefinery approach for bio-waste conversion to value-added by-products.

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Section: Biosolid Treatmentmentioning

confidence: 99%

Enzymatic Treatments for Biosolids: An Outlook and Recent Trends

Quintero-García

Pérez-Soler

Amezcua‐Allieri

2023

IJERPH

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“…This transformation is carried out in anaerobic digester, which uses microbes in anoxigenic conditions to stabilize the organic matters by transforming it into methane and other inorganic products [6]. Several microbial species have been known for their ability to break down organic materials present in wastes there by producing value added products [7].…”

Section: Introductionmentioning

confidence: 99%

A review of biogas production from palm oil mill effluents using different configurations of bioreactors

Ohimain

Izah

2017

Renewable and Sustainable Energy Reviews

149

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Palm oil mill effluent (POME) is generated from the sterilization, condensation and hydrocycloning of palm oil in mills. If the effluent is discharged into the aquatic and terrestrial ecosystem without treatment, it could lead to high biological oxygen demand (BOD), chemical oxygen demand (COD) and acidic pH of the receiving waters. Biogas consisting mostly of methane, carbon dioxide, and to a lesser hydrogen has been produced through anaerobic treatment of this toxic effluent. The process of biogas production involves microbial synthesis involving hydrolysis, acidogenesis, acetogenesis and methanogenesis. Biogas is formed during anaerobic degradation of POME by indigenous microbial communities. This review updates the current state of art of biogas production through anaerobic digestion of POME using different configurations of reactors such as fluidized bed reactor, anaerobic filtration, up-flow anaerobic sludge blanket (UASB) reactor, anaerobic contact digestion, up-flow anaerobic sludge fixed-film (UASFF) reactor, modified anaerobic baffled bioreactor (MABB), anaerobic baffled bioreactor (ABR), continuous stirred tank reactor (CSTR), expanded granular sludge bed (EGSB) reactor, Ultrasonicated membrane anaerobic system (UMAS), Ultrasonic-assisted Membrane Anaerobic System (UAMAS), membrane anaerobic system (MAS)and upflow anaerobic sludge blanket reactor (UASBR). The factors that influences biogas yield during treatment include pH, temperature (environmental factors), organic loading rate (OLR), hydraulic retention time (HRT), mixing rate, pressure, equilibrium, nutrient and microbial activities (Internal factors). Based on this study, UAMAS is the best configuration for methane production from POME during anaerobic treatment. Biogas from POME could contribute to energy sources of oil palm producing nations, while preventing the attendant environmental impacts associated with its disposal.

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