Enhancing anaerobic co-digestion of primary settled-nightsoil sludge and food waste for phosphorus extraction and biogas production: effect of operating parameters and determining phosphorus transformation

Pimpeach, Wanida; Polprasert, Chongchin; Panyapinyopol, Bunyarit; Polprasert, Supawadee; Mahasandana, Suwisa; Patthanaissaranukool, Withida

doi:10.1007/s11356-022-23853-5

Environ Sci Pollut Res

2022

DOI: 10.1007/s11356-022-23853-5

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Enhancing anaerobic co-digestion of primary settled-nightsoil sludge and food waste for phosphorus extraction and biogas production: effect of operating parameters and determining phosphorus transformation

Wanida Pimpeach

Chongchin Polprasert

Bunyarit Panyapinyopol

et al.

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2024

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Cited by 2 publications

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Phosphorus mass flows and economic benefits of food waste management: the case study of selected retail and wholesale fresh markets in Thailand

Mokjatturas,

Chinwetkitvanich,

Patthanaissaranukool

et al. 2024

Clean Techn Environ Policy

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This study aims to investigate the mass flow and the phosphorus flow of food waste in order to propose a viable technique for its recovery from food waste in retail and wholesale fresh markets. These markets are significant food waste sources, including valuable elements such as organic carbon, nitrogen, and phosphorus. This research provides critical data that can inform and guide the development of sustainable and cost-effective waste management strategies. The results indicate that retail markets generate 13.47 tons/d of food waste, while wholesale markets produce a staggering 192.62 tons/d. For phosphorus flow analysis, the data show that retail markets produce 12.80 kg P/d, while wholesale markets produce 40.79 kg P/d. Uncooked food waste is a major cause of phosphorus loss in retail and wholesale markets. An estimated 3.65 kg P/d is lost from retail and 20.72 kg P/d from wholesale. Separating food waste from general waste and recovering the phosphorus content is essential to reduce P loss. According to this study, separating food waste and selling it as animal feed (Scenario 1) or using it to create organic fertilizer (Scenario 2) are more profitable than the current waste management practice. These options can generate around 180,000 and 960,000 USD/year, respectively. Currently, it is not cost-effective to produce concentrated P fertilizer (scenario 3) due to the high energy and technology required. The study’s results can guide policymakers toward comprehensive food waste management in fresh markets and sustainable phosphorus recovery for food and agricultural production. Graphical abstract

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Phosphorus mass flows and economic benefits of food waste management: the case study of selected retail and wholesale fresh markets in Thailand

Mokjatturas,

Chinwetkitvanich,

Patthanaissaranukool

et al. 2024

Clean Techn Environ Policy

Self Cite

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Phosphorus and bioenergy recovery from anaerobic co-digestion of food waste and corn residues with digested sludge: effect of HRT and pre-treatment methods

Khaita,

Chinwetkitvanich,

Polprasert

et al. 2024

Clean Techn Environ Policy

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Organic wastes from the human ecosystem including food waste (FW), agricultural waste and digested sludge (DS) from wastewater treatment can be utilized as valuable materials in anaerobic co-digestion (AcoD) for the dual purpose of bioenergy production and phosphorus (P) recovery through a chemical precipitation process. In this study, AcoD using FW and corn residues (CS) with DS for simultaneous sustainable phosphate release and biogas production were investigated. Different hydraulic retention times (HRT) of 10, 20, and 30 days were investigated, and FW was grinded, while CS pre-treatment methods including physical (FWCS), chemical (FWCS-Chem), and thermal (FWCS-Temp) were considered. The substrates of FW and CS compositions were conducted with a total organic loading of 6 g volatile solids (VS)/L/d (5 FW/1 CS) with a carbon-to-nitrogen ratio (C/N) of 24. The results indicate that FWCS-Chem showed the highest cumulative biogas production simultaneously with P release at HRT 20 days with 7279 L/m3 and 29.67%, respectively. Moreover, the effluent from all digesters exhibited a Mg/P ratio above 1, suitable for struvite precipitation without an external Mg source. Accordingly, FW, FWCS, and FWCS-Chem achieved P recovery rates of 63.64%, 69.75%, and 70.19% at 20-day HRT, with corresponding P contents in solids of 9.45, 9.43, and 8.29%, respectively. These values are comparable to commercial phosphate fertilizer containing 8.80% P. Moreover, incinerating the precipitating solids offers high-quality P concentrations in solids of up to 15.52, 16.32, and 16.31%, respectively. Hence, 20-day HRT was found to be the optimal condition for FW, CS, and DS for anaerobic co-digestion, resulting in the highest biogas production, P release, and maximum financial return for P recovery. Graphical abstract Phosphorus and bioenergy recovery from anaerobic co-digestion of food waste and corn residues with digested sludge.

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Enhancing anaerobic co-digestion of primary settled-nightsoil sludge and food waste for phosphorus extraction and biogas production: effect of operating parameters and determining phosphorus transformation

Cited by 2 publications

References 52 publications

Phosphorus mass flows and economic benefits of food waste management: the case study of selected retail and wholesale fresh markets in Thailand

Phosphorus mass flows and economic benefits of food waste management: the case study of selected retail and wholesale fresh markets in Thailand

Phosphorus and bioenergy recovery from anaerobic co-digestion of food waste and corn residues with digested sludge: effect of HRT and pre-treatment methods

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