Recent literature has reported that high concentrations of indicator bacteria such as fecal coliforms (FCs) were measured in anaerobically digested sludges immediately after dewatering even though low concentrations were measured prior to dewatering. This research hypothesized that the indicator bacteria can enter a non-culturable state during digestion, and are reactivated during centrifuge de...

A novel co-digestion approach was evaluated to determine if agricultural and industrial waste residues could efficiently degrade straw without pretreatment. Untreated rice straw was co-digested with pig wastewater and anaerobic sludge from the pulp and paper mill treatment process in a pilot-scale digester (1 m) operated in dry, mesophilic conditions. The total weight ratio of dry straw to pig ...

Goat manure (GM) is an excellent raw material for anaerobic digestion because of its high total nitrogen content and fermentation stability. Several comparative assays were conducted on the anaerobic co-digestion of GM with three crop residues (CRs), namely, wheat straw (WS), corn stalks (CS) and rice straw (RS), under different mixing ratios. All digesters were implemented simultaneously under...

High solid anaerobic digestion (HSAD) is a rapidly developed anaerobic digestion technique for treating municipal sludge, and has been widely used in Europe and Asia. Recently, the enhanced HSAD process with thermal treatment showed its advantages in both methane production and VS reduction. However, the understanding of the microbial community is still poor. This study investigated microbial c...

The study aimed to investigate the enhancement of biogas production through anaerobic digestion from blends wastewater and microalgae. microalgae functioned as a co-substrate. A series laboratory-scale batch co-digestion were carried out under mesophilic conditions for 21 days. Biogas rates (WW) alone different WW (MA) analysed. In addition, nutrient values reduction in volume after determined....

Small-scale anaerobic digestion (AD) can be an effective organic waste management system that also provides energy for small businesses and rural communities. This study measured fuel production from digestions of single mixed feedstocks using unheated, 2 m3 digester operated continuously in a temperate climate over three years. Using local food waste, brewery grease agricultural residues, this...

Anaerobic co-digestion of primary and secondary sewage sludge <i>Cladophora</i> green algae was investigated under mesophilic temperature conditions. The design experiment method the optimal mixture were used to systematically optimize substrate composition ratios elucidate possible synergistic effects for an anaerobic digestion system. A reduced cubic model created by Design-Expert...

Anaerobic digestion is a promising alternative to disposal organic waste and co-digestion of mixed organic wastes has recently attracted more interest. This study investigated the effects of temperature and carbon-nitrogen (C/N) ratio on the performance of anaerobic co-digestion of dairy manure (DM), chicken manure (CM) and rice straw (RS). We found that increased temperature improved the metha...