In the present study, enhanced wet oxidation of excess sludge from pharmaceutical wastewater by NaOH as an alkaline homogeneous catalyst was investigated. The experiments were carried out in a stainless-steel batch autoclave reactor. highest volatile suspended solids (VSS) removal rate, 95.2%, achieved at 260 °C within 60 min with initial oxygen pressure 1.0 MPa and 0.5 g·L−1. Simultaneously, c...

Manure residues have been identified as a major source of environmental pollution. Traditionally, the waste has been disposed directly or after composting, as soil amendments in the agricultural industry. Since this practice has resulted in the degradation of air, soil, and water resources, new regulations for protecting the environment have been promulgated to control land application of anima...

Background The sustainability of microbial lipids production from traditional carbon sources, such as glucose or glycerol, is problematic given the high price of raw materials. Considerable efforts have been directed to minimize the cost and find new alternative carbon sources. Volatile fatty acids (VFAs) are especially attractive raw materials, because they can be produced from a variety of or...

Bio-based production of materials from waste streams is a pivotal aspect in circular economy. This study aimed to investigate the influence inoculum (three different sludge taken anaerobic digestors), pH (5 & 10) and retention time on total volatile fatty acids (VFAs), VFA composition as well microbial community during digestion food waste. The highest was ?22000 ± 1036 mg COD/L 12927 1029 day ...

In this study, a newly established bench-scale thermophilic continuously stirred fluidized bed reactor (CSFBR) was applied for anaerobic co-digestion of food waste (FW) with grease trap (GTW). The performance CSFBR regarding stability and treatment efficiency inspected through laboratory contrast experiment two traditional continuous tank reactors (CSTRs). the OLR range 3.19–7.41 g COD/L/d, met...

Acidogenic fermentation of wastes produces volatile fatty acid (VFA)-rich streams that can be used as low-cost carbon sources for polyhydroxyalkanoate (PHA) production. In this study, an inoculum collected from anaerobic reactor a municipal WWTP was conditioned to suppress methanogenic activity. The heat-shock conditioning method the proved more efficient than and alkaline methods methanogens i...

to clarify fermentative alterations in the large intestine (hindgut) during grazing, fecal alcohol and volatile fatty acids (vfas) concentrations were evaluated in 30 dairy heifers. the heifers were kept in pasture growing mixed grass herbage from spring (mid may) until october, and their rectal feces were collected periodically. concentrations of ethanol, methanol and isopropanol were increase...