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Aerobic decomposition of food waste with different ratios of solids at ambient temperatures and evaluation of CO2 emissions

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Abstract

The aim of this study was to investigate the recycling of organic matter in the food waste by degrading aerobically and evaluation of the CO2 emissions. With this aim, food waste with the content of 5–7–10 % TS was degraded aerobically. The pH in all the reactors was observed within the range of 6.5–7. The highest CO2 production rate was obtained from 5 % TS. Removal was achieved at the rates of 5 % TS and 57 % in COD and TOC. CO2 production rate was calculated as 38.53 g CO2/h/kg TOCw. Moreover, CO2 production potential of the food waste was identified. A batch, single-stage reactor was used to determine the food waste pre-treatment. Finally, food waste in landfill areas was recycled and evaluated by without taking.

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Abbreviations

FW:

Food waste (kg)

WS:

Waste sludge (kg)

TS:

Total solids contents (mg/l)

VS:

Volatile solids contents (mg/l)

COD:

Chemical oxygen demand (mg/l)

CODw :

Water extractable COD (mg/l)

TOC:

Total organic carbon (mg/l)

TOCw :

Water extractable total organic carbon (mg/l)

Cw :

Water extractable C (mg/l)

Cw/Nw :

Water extractable C/N

t :

The reaction time (h)

G o :

The flow rate of the dried exhaust gas (m3/h)

Z :

The weight of the CO2 in the dried exhaust gas (g CO2/m3)

\(\gamma_{{CO_{2} }}\) :

The rate of CO2 evolution (g CO2/h/kg TOCw)

\(W_{{{\text{TOC}}_{\text{w}} }}\) :

kg TOCw amount of mixture % (solid basis)

\(\gamma_{{TOC_{w} }}\) :

The overall degradation rate of the TOCW in the raw mixed materials (kg TOCw/h)

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Authors and Affiliations

  1. Köseköy School of Technical Vocational, University of Kocaeli, Kocaeli, 41135, Turkey

    Sevgi FERSİZ

  2. Department of Environmental Engineering, University of Kocaeli, Kocaeli, 41380, Turkey

    Sevil VELİ

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  1. Sevgi FERSİZ
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  2. Sevil VELİ
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Correspondence to Sevgi FERSİZ.

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FERSİZ, S., VELİ, S. Aerobic decomposition of food waste with different ratios of solids at ambient temperatures and evaluation of CO2 emissions. J Mater Cycles Waste Manag 17, 748–755 (2015). https://doi.org/10.1007/s10163-014-0298-y

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  • DOI: https://doi.org/10.1007/s10163-014-0298-y

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