Effects of microbial inoculant and additives on pile composting of cow manure

Abstract

Composting is an effective method of recycling organic solid waste, and it is the key process linking planting with recycling. To explore the reuse of agricultural organic solid waste as a resource in the Yellow River Delta, the effects of microbial inoculant and different additives (calcium superphosphate, biochar, tomato straw, rice husk, and sugar residue) on pile composting of cow dung were studied to obtain the best composting conditions. The results showed that microbial inoculant and additives all played positive roles in the process of aerobic composting, and the experimental groups outperformed the control groups without any additives. For discussion, the microbial inoculant promoted rapid pile body heating more than the recovery materials alone, and the effects on aerobic composting were related to the organic matter of substrates and biochar. After being composted, all the materials were satisfactorily decomposed. Degradation of additives into humic acid might serve as electron shuttles to promote thorough organic matter decomposition. These results provide a scientific basis data for industrial composting of organic solid waste processed by on-site stacking, and provide a reference for researcher and practitioners for studying the applications of microbial inoculant on aerobic composting.

Effects of composts obtained from hazelnut wastes on the cultivation of pepper (Capsicum annuum) seedlings

“…In the whole process, this value must be maintained above 6 30 . pH has an important role in the activity of microorganisms, which need between 7 and 8.5 for optimum microbial activity 31 . The pH of the initial mixtures of C1 and C2 was under 7, but that of C3 and C4 was above 8 (Fig.…”

“…Another important indicator of the composting process is EC, which shows the soluble salt concentration. It must be under 4000 µS/cm so as not to be toxic to the crops 31 . C1, C2, C3, and C4 had stable EC after 15 days from the initial composting (Fig.…”

Characterization of Mixtures of Rugulopteryx okamurae Compost and Plant Residues to Determine the Most Effective Composition as a Substrate and Source of Nutrients

“…In comparison to other composts that employ the co-composting of manure and plant debris, these have been observed to exhibit higher levels of Fe and Zn (8879 mg kg −1 and 605 mg kg −1 ) [70]. The average limits for heavy metals in biowaste compost in European countries are 1.4, 93, 143, 1.0, 47, 121, 416, and 23 mg kg −1 for Cd (cadmium), Cr (chromium), Cu (copper), Hg (mercury), Ni (nickel), Pb (lead), Zn (zinc), and As (arsenic) [85].…”

“…Compost samples were collected periodically, with each consisting of eight random subsamples from the pile. The saturated extract was measured using these samples, and the following results were obtained: The change in pH is an indicator of the degradation of organic matter and the mineralization of proteins and derivatives [70]. The graphs in Figure 5.…”

Matured compost amendment improves compost nutrient content by changing the bacterial community during the composting of Chinese herb residues

“…The total phosphorus (TP) and total potassium (TK) were analyzed via the molybdenum blue colorimetric method and a flame spectrophotometer ( Zhang et al, 2018 ). The humic acid (HA) and fulvic acid (FA) levels were analyzed as detailed in previous research ( Ye et al, 2021 ; Yang et al, 2023 ).…”