The dosage-effect of biochar on anaerobic digestion under the suppression of oily sludge: Performance variation, microbial community succession and potential detoxification mechanisms

Effects of Iron, Lime, and Porous Ceramic Powder Additives on Methane Production from Brewer’s Spent Grain in the Anaerobic Digestion Process

“…It is noteworthy that the addition of 0.40 g zeolite × g VSS −1 resulted in a decline in the process performance compared to the control group without any supplementation. Similar results were obtained by Shi et al [48], who investigated the impact of different biochar doses on suppressed mesophilic anaerobic digestion of oily sludge (OS). Biochar doses of 0.6, 1.2, 2.4, and 4.8 g biochar × g VS of OS −1 were used.…”

“…In addition to the porous structure, other specific properties of used materials (e.g., surface functional groups, existence of metals, specific surface area ion exchange capacity, etc.) can affect the AD process, and the final effects will depend on the synergetic/antagonistic interactions [44,45,48]. For example, Montalvo et al [49] studied the effects of particle size and doses of zeolite and sand addition on the AD of synthetic and piggery wastes.…”

Enhanced performance and microbial communities of anaerobic digestion with biochar in pilot-scale continuous stirred-tank reactors: effects of substrate concentration and hydraulic retention time

“…Alternatively, biochar, which originates from the pyrolysis or hydrothermal carbonization and the gasication of waste biomass, 13,14 possesses many advantages, such as low price, sustainability, excellent capability owing to a highly specic surface area, a multi-pore carbonaceous structure, abundant surface active groups, and strong electrical conductivity. 15,16 In AD systems, biochar with proper dosage can adsorb inhibitors such as volatile fatty acids (VFAs), NH 3 -N, free NH 3 , and phenols, 17,18 increase system stability, 19,20 and nally improve the production of CH 4 . 21 In recent years, biochar has been applied in AD that has been fed with various types of complex organic wastes, such as different types of wastewaters, waste activated sludge, kitchen waste, chicken manure, and citrus peel waste (Table 1).…”

Laser induced breakdown spectroscopy combined with hybrid variable selection for the prediction of the environmental risk Nemerow index of heavy metals in oily sludge

“…1,2 Toxic components in oily sludge include heavy metals, aromatic hydrocarbons, aged crude oil, bacteria and a small amount of radioactive elements, which have been listed in the national list of hazardous wastes of China (2016 Edition). [3][4][5] The pollution of heavy metals is different from the pollution of organic compounds and bacteria, which has the characteristics of concealment, enrichment and difficult degradation. The excessive content of heavy metals in soil will not only affect the photosynthesis and metabolic intensity of plants, but also cause the decay of plant roots and leaf abscission, resulting in the pollution of crops and the decline of quality and output.…”