Characterization of typical household food wastes from disposers: Fractionation of constituents and implications for resource recovery at wastewater treatment

Kim, M.; Chowdhury, Mohammad Monirul Islam; Nakhla, George; Keleman, Michael

doi:10.1016/j.biortech.2015.02.034

Cited by 39 publications

(14 citation statements)

References 15 publications

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“…This raw water, even though it cannot mimic the fluctuation of the influent parameters of the wastewater flowing into a typical septic system, provides a consistent input for the research study. FW was obtained after grinding representative food waste samples procured from an InSinkErator FWD (model 5-84a, SN 15041100454) and the FW recipe had been used in a previous characterization study (Kim et al, 2015). During grinding, about 1 kg of a heterogeneous mixture of FW was diluted by a factor of 6.17 because of flushing the waste via tap water.…”

Section: Methodsmentioning

confidence: 99%

Study of food waste degradation in a simulated septic tank

et al. 2019

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Septic systems are typically designed to treat domestic wastewater from households without access to centralized facilities. The installation of a food waste disposer (FWD) may increase the discharge of food waste (FW) into the wastewater; therefore, the installation of a FWD is discouraged in households that have a septic system. This study was conducted to determine how a typical dose of FW from a FWD can affect the performance of a septic system in terms of sewage treatment and solids accumulation. A 20-L control tank was compared with an experiment tank to which FW was added, increasing the amount of total suspended solids (TSS) by 31.3% and total chemical oxygen demands by 46.3% for a period of 110 days. Although the influent water quality changed dramatically, the effluent from the experiment tank had a substantially lower percentage increase in water quality parameters compared with the effluent from the control. It was found that in the experiment tank, 75.8% of FW TSS was degraded, whereas only 36.7% of sewage TSS was degraded, and that 18.8% of FW TSS and 44.9% of sewage TSS accumulated in the experiment tank. The addition of FW increased the scum accumulation, even though the dry matter of the scum layer was much less in quantity than the sludge layer. It also increased the lipid content in the sludge. The increase in the scum layer was mainly due to the increase in protein from the addition of the FW. Overall, compared with sewage TSS, FW TSS tends to be more biodegradable, which indicates that the impact on pumping frequency from adding FW will be insignificant.

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Section: Methodsmentioning

confidence: 99%

Study of food waste degradation in a simulated septic tank

et al. 2019

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“…tap water for three runs and MWW for three runs. The FW consisted of 37.4 g meat, 74.8 g dairy, 79.2 g grains, 140.8 g fruits, and 107.8 g vegetables according to a recent study by Kim et al (2015). The ratios of the various major food groups were kept constant in the recipe according to the typical US diet (U.S. Census Bureau, 2011).…”

Section: Methodsmentioning

confidence: 99%

Flocculent Settling of Food Wastes

Chowdhury

Kim²,

Haroun³

et al. 2016

Water Environment Research

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This study evaluated the flocculent settling in water and municipal wastewater (MWW) in a 10.6 ft deep column. A total of eight runs at three different testing conditions involving MWW alone, food waste (FW) alone, and FW in MWW (FW+MWW) were conducted. Total suspended solid (TSS), total BOD (TBOD), total COD (TCOD), total nitrogen (TN), and total phosphorous (TP) removal efficiencies after 3 hours of settling were 62%, 46%, 49%, 46% and 62% for FW, and 50%, 43%, 39%, 37% and 24% for MWW. Removal efficiencies of particulate COD (PCOD) and particulate BOD (PBOD) at the lowest surface overflow rate (SOR) of 1.1 m3/m2/hr corresponding to the longest settling time of 3 hours were 59% and 64% for FW, and 65% and 70% for FW with MWW samples. On the other hand, no significant variation between FW and FW with MWW was observed for PN removal after 3 hours of settling.

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“…Concentrations are calculated from daily constituent load per capita and are in concordance with previous studies 110,[119][120][121][122][123] . Food waste composition allows to calculate the nal composition of the treatment train in uent 101,124,125 . We integrated a vertical farm with hydroponic culture methods into the water reuse infrastructure allowing for the application of the fertilizers collected from the system to produce vegetables.…”

Section: Composition Of Flowsmentioning

confidence: 99%

Using Water and Wastewater Decentralization to Enhance the Resiliency and Sustainability of Cities

Baserba,

Sedlak,

Barnosell

et al. 2023

Preprint

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The imperative to make energy and resource consumption more sustainable is prompting a critical reconsideration of all human endeavors. Within urban water management, the drive to enhance sustainability is grounded in the recognition that water services consume a substantial amount of energy and that wastewater contains valuable resources, including water, heat, organic matter, and essential plant nutrients. To make urban water systems more sustainable, a paradigm shift is needed. Among the proposed strategies, source separation coupled with anaerobic co-digestion appears to be an effective means of recovering energy, water, and nutrients. Because existing centralized infrastructure that serves tens to hundreds of thousands of people is difficult to alter, and the technologies needed to realize this strategy are difficult to implement in single-family homes, we consider the scale of a city block. Using a quantitative model of unit processes that simulate energy, water, and nutrient flows, we consider the technical and economic feasibility of a representative decentralized system, as well as its environmental impacts. To realize potential synergies associated with on-site use of the recovered resources, we complement the decentralized water system with vertical farming, photovoltaic energy generation, and rainwater harvesting. Our analysis suggests that decentralized water systems can serve as a cornerstone of efforts to enhance resource efficiency and improve the resilience of cities.

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Characterization of typical household food wastes from disposers: Fractionation of constituents and implications for resource recovery at wastewater treatment

Cited by 39 publications

References 15 publications

Study of food waste degradation in a simulated septic tank

Study of food waste degradation in a simulated septic tank

Flocculent Settling of Food Wastes

Using Water and Wastewater Decentralization to Enhance the Resiliency and Sustainability of Cities

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