Codigestion is an emerging approach to improve wastewater sludge biogas production and valorize food waste (FW). This study explores FW-derived biochar as a codigestion amendment for the first time reports matrix experiment using four diverse amendments (mixed waste, pinewood, bonechar, unamended control) across FW types (vegetable, rice, chicken, mixed). It demonstrated that derived from mixed...

The aim of this study was to assess the effects of the codigestion of food manufacturing and processing wastes (FW) with sewage sludge (SS), that is, municipal wastewater treatment plant primary sludge and waste activated sludge. Bench scale mesophilic anaerobic reactors were fed intermittently with varying ratio of SS and FW and operated at a hydraulic retention time of 20 days and organic loa...

Anaerobic digestion is the most widely used technology to produce biogas such as methane and hydrogen from the decomposition of organic compounds. The effectiveness of the process depends on the stability of the consecutive reactions i.e. hydrolysis, acidification, acetogenesis, and methanogenesis. The process is widely used in sludge treatment for stabilization and production of methane gas. D...

This study evaluated the co-digestion of domestic wastewater solids (WWS) and food waste (FW) at bench-scale for Yosemite National Park, California, which operates a 1900 m3/d treatment plant in El Portal, California. A 35-day biochemical methane potential test was performed on varying amounts FW as percentage total (WWS plus FW) volatile basis (%FW). Specific yield volumetric increased substan...

Anaerobic digestion of autoclaved (160°C, 6.2 bar) and untreated source segregated food waste (FW) was compared over 473 days in semi-continuously fed mesophilic reactors with trace elements supplementation, at organic loading rates (OLRs) of 2, 3, 4 and 6 kg volatile solids(VS)/m(3)d. Methane yields at all OLR were 5-10% higher for untreated FW (maximum 0.483±0.013 m(3) CH4/kg VS at 3 kg VS/m(...

The sustainable management of household food waste (FW) and blackwater (BW) is becoming more challenging. This research investigated three different semi-continuous stirred tank reactor (CSTR) performances for digestion the mixture BW FW; producing biogas. Through application serial semi-CSTR (35 °C), produced biogas from BW-FW (1:1 proportion) offered to be higher than single 55 °C (25%) that ...

Food losses (FL) and waste (FW) occur throughout the food supply chain. These residues are disposed of on landfills producing environmental issues due to pollutants released into air, water, soil. Several research efforts have focused upgrading FL FW in a portfolio added-value products energy vectors. Among most relevant advances, biotechnological these via fermentation has been demonstrated be...

• A spatial clustering model was developed to locate recycling infrastructure. novel method of mapping food waste generation as points is presented. Volumetric hauling burden a key determinant boundaries. Food ideal material for at small scales. Decentralized infrastructure can promote localized circular economies. In 2016, California passed Senate Bill (SB) 1383 reduce short-lived climate poll...

Rather than landfilling, composting the organic fraction of municipal solid wastes recycles the waste as a safe and nutrient enriched soil amendment, reduces emissions of greenhouse gases and generates less leachate. The objective of this project was to investigate the composting effectiveness of three bulking agents, namely chopped wheat (Triticum) straw, chopped mature hay consisting of 80% t...

Biochemical reactions occurring during anaerobic digestion have been modelled using reaction kinetic equations such as first-order, Contois and Monod which are then combined to form mechanistic models. This work considers models which include between one and three biochemical reactions to investigate if the choice of the reaction rate equation, complexity of the model structure as well as the i...