Biological H 2 potential harvested from complex gelatinaceous wastewater via attached versus suspended growth culture anaerobes

Upgrading continuous H2gas recovery from rice straw hydrolysate via fermentation process amended with magnetite nanoparticles

“…Chemical oxygen demand (COD) was determined using Hanna COD reactor and Hach DR900, while total Kjeldahl nitrogen (TKN) and ammonia nitrogen (NH 4 ‐N) were measured using behr stem distillation and digestion system according to APHA (2005). TRS concentration was estimated as equivalent glucose by applying the phenol‐sulfuric acid method using UV spectrophotometer (Hitachi U‐390) . Soluble metabolite by‐products (SMPs) such as acetate, butyrate, and propionate were identified using Shimadzu HPLC device (LC‐10AD).…”

“…TRS concentration was estimated as equivalent glucose by applying the phenol-sulfuric acid method using UV spectrophotometer (Hitachi U-390). 32 Soluble metabolite by-products (SMPs) such as acetate, butyrate, and propionate were identified using Shimadzu HPLC device (LC-10AD). The measuring conditions of oven temperature, mobile phase, and flow rate were 40°C, 4 mM H 2 SO 4 , and 0.5 mL/min, respectively, for 22 minutes followed by 0.4 mL/min for 8 minutes.…”

“…Similarly, Elreedy et al 28 discovered that an improvement at hyd activity reached up to 160% as a result of the addition of 200 mg/L hematite NPs. Furthermore, Mostafa et al 32 found that batch reactor loaded with 100 mg/L magnetite/graphene oxide nanocomposite achieved hyd activity 9-fold greater than nonloaded one.…”

Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

“…HAc, HBu, and HCa are the desirable metabolites by-products for hydrogen production pathways. On the other hand, HLa and HPr are undesirable and consuming hydrogen pathways [51]. A number of studies have been done on the generation of biohydrogen from food processing industries' wastewater; however very few studies have been carried out on hydrogen production from domestic wastewater.…”

Comparative analysis of common full scale reactors for dry anaerobic digestion process

“…Consequently, environmental management of solid waste produced every year has to be safely disposed without any negative impact to the environment [1]. Anaerobic conversion of organic wastes to renewable source of energy appears to be one of the most promising methods [2,3], since anaerobic digestion process can handle many types of organic solid waste such as organic faction of municipal solid waste (OFMSW) [4][5][6], industrial solid waste [7,8] and agro-lignocellulosic waste [9][10][11]. These types of wastes are free of charge since they are waste and has to be disposed, plentiful, and composed of high organic fraction, which is preferable substrate to anaerobic consortium [12].…”