Anaerobic digested residue (DR) is the main by-product from biogas plants, and it is predominantly used as organic fertilizer after composting. To resolve the problems of long duration and nitrogen loss in conventional composting, bulking agents are always added during the composting process. In this study, oyster shell (OS) was used as a bulking agent for DR composting. Four treatments were conducted by mixing DR and OS at different concentrations (0%, 10%, 20% and 30%, based on wet weight) and then composting the mixtures for 40 days. The results showed that the organic matter (OM) degradation efficiency was enhanced by 5.62%, 12.15% and 16.98% with increasing amounts of OS addition. The increased content of microbial biomass carbon in the compost indicated a suitable living environment for aerobic microbes with added OS, which could explain the increased OM degradation efficiency. Compared with the control, the NH emissions in the treatments with 10%, 20% and 30% OS were decreased by 13.81%, 33.33% and 53.76%, respectively. The increase in total nitrogen content in the compost is probably due to the absorption of NH by OS. Results indicated that OS is a suitable bulking agent for DR composting and that the addition of 20-30% OS can significantly enhance composting performance.
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http://dx.doi.org/10.1007/s11356-020-09460-2 | DOI Listing |
Comp Biochem Physiol Part D Genomics Proteomics
January 2025
Fishery collage, Guangdong Ocean University, 524088 Zhanjiang, China; Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Zhanjiang 524088, China; Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Zhanjiang 524033, China. Electronic address:
Biomineralization to fabricate diverse morphology shell is typical character of bivalve species and ectopic calcification to form is the production of defense. Long non-coding RNAs (LncRNAs) plays critical roles in multiple cellular biological processes in invertebrate and vertebrate. However, LncRNAs remain poorly understood about expression and regulation roles in bivalve biomineralization studies.
View Article and Find Full Text PDFWater Res X
May 2025
Integrated Science and Technology Research Center, Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Kathu, Phuket 83120 Thailand.
This study rigorously evaluates the adsorption performance of the Cry-Ca-COS monolith for phosphate removal in a column operation mode. Characterization of the material both before and after exhaustion in a continuous flow system (column form) showed no difference compared to results from a batch system (tablet form). The XPS results indicated that the adsorption mechanism of phosphate on the Cry-Ca-COS column involved surface microprecipitation and ligand exchange (inner-sphere complexation).
View Article and Find Full Text PDFPathogens
December 2024
Department of Aquatic Life Medicine, Pukyong National University, Busan 48513, Republic of Korea.
White spot syndrome virus (WSSV) poses a major risk to shrimp aquaculture, and filter-feeding bivalves on shrimp farms may contribute to its persistence and transmission. This study investigated the bioaccumulation and vector potential of WSSV in Pacific oysters (), blue mussels (), and manila clams () cohabiting with WSSV-infected shrimp. Sixty individuals of each species (average shell lengths: 11.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Department of Green Technology for Sustainability, Nanhua University, Chiayi 62248, Taiwan.
The construction industry contributes significantly to global carbon emissions, accounting for approximately 27% of total emissions. With the increasing demand for concrete, there is a growing need to explore alternative materials that can reduce environmental impact. This study investigates the potential of using oyster shell powder, a waste material, as a partial replacement for fine aggregates in concrete.
View Article and Find Full Text PDFCalcif Tissue Int
January 2025
Orthopaedic Research Laboratory, Department of Orthopedic Surgery and Traumatology, Odense University Hospital & Department of Clinical Research, University of Southern Denmark, V18-812B-1, Etage 1, Bygning 45.4, Nyt Sund, SDU Campus 5230, Odense, Denmark.
There is an increasing demand for a suitable bone substitute to replace current clinical gold standard autografts or allografts. Majority of previous studies have focused on the early effects of substitutes on bone formation, while information on their long-term efficacies remains limited. This study investigated the efficacies of natural hydroxyapatite (nHA) derived from oyster shells and synthetic hydroxyapatite mixed with collagen (COL/HA) or chitosan (CS/HA) on bone regeneration and implant fixation in sheep.
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