Organic matter removal from landfill leachate by adsorption using spent coffee grounds activated carbon

Due to the strict legislation currently in use for landfilling, anaerobic digestion has a strong potential as an alternative treatment for biodegradable waste. Coffee is one of the most consumed beverages in the world and spent coffee grounds (SCG) are generated in a considerable amount as a processing waste during making the coffee beverage. Chemical composition of SCG, presence of polysaccharides, proteins, and minerals makes from the SCG substrates with high biotechnological value, which might be used as valuable input material in fermentation process. The methane production ranged from 0.271–0.325 m3/kg dry organic matter.

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Pore Structures and Electric Double Layer Properties of Activated Carbon Derived from Demineralized Spent Coffee Grounds

Electrochemistry ◽

10.5796/electrochemistry.21-00085 ◽

2021 ◽

Author(s):

Keisuke KIKUCHI ◽

Keigo HASUMI ◽

Takashi FUJIMURA

Keyword(s):

Activated Carbon ◽

Double Layer ◽

Electric Double Layer ◽

Spent Coffee Grounds ◽

Pore Structures ◽

Coffee Grounds

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Combination of Coagulation, Adsorption, and Ultrafiltration Processes for Organic Matter Removal from Peat Water

Sustainability ◽

10.3390/su14010370 ◽

2021 ◽

Vol 14 (1) ◽

pp. 370

Author(s):

Muthia Elma ◽

Amalia Enggar Pratiwi ◽

Aulia Rahma ◽

Erdina Lulu Atika Rampun ◽

Mahmud Mahmud ◽

...

Keyword(s):

Organic Matter ◽

Activated Carbon ◽

Natural Organic Matter ◽

Membrane Fouling ◽

Aluminum Sulfate ◽

Adsorption Process ◽

Powdered Activated Carbon ◽

Organic Matter Removal ◽

Water Borne

The high content of natural organic matter (NOM) is one of the challenging characteristics of peat water. It is also highly contaminated and contributes to some water-borne diseases. Before being used for potable purposes, peat water must undergo a series of treatments, particularly for NOM removal. This study investigated the effect of coagulation using aluminum sulfate coagulant and adsorption using powdered activated carbon (PAC) as a pretreatment of ultrafiltration (UF) for removal of NOM from actual peat water. After preparation and characterization of polysulfone (Psf)-based membrane, the system’s performance was evaluated using actual peat water, particularly on NOM removal and the UF performances. The coagulation and adsorption tests were done under variable dosings. Results show that pretreatment through coagulation–adsorption successfully removed most of the NOM. As such, the UF fouling propensity of the pretreated peat water was substantially lowered. The optimum aluminum sulfate dosing of 175 mg/L as the first pretreatment stage removed up to 75–78% NOM. Further treatment using the PAC-based adsorption process further increased 92–96% NOM removals at an optimum PAC dosing of 120 mg/L. The final UF-PSf treatment reached NOM removals of 95% with high filtration fluxes of up to 92.4 L/(m2.h). The combination of three treatment stages showed enhanced UF performance thanks to partial pre-removal of NOM that otherwise might cause severe membrane fouling.

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