A new paradigm for whole-chain low-carbon utilization of food waste secondary waste based on multivariate evaluations.

The rapid growth of China's food and beverage industry has led to a significant increase in food waste, presenting major challenges for its disposal. Anaerobic digestion is the primary treatment method, but its by-products-biogas slurry (BS) and biogas residue (BR)-pose additional treatment challenges. This study proposes and evaluates three management scenarios for these by-products: (1) BS sewage treatment with BR incineration (S1), (2) BS land application with BR composting (S2), and (3) BS sewage treatment with BR composting (S3).

Controls on diversity of core and indicative microbial subcommunities in Tibetan Plateau grassland soils.

Core subcommunity represents the less diversity but high abundance, while indicative subcommunity is highly diverse but low abundance in soils. The core subcommunity fundamentally maintains ecosystem stability, while the indicative plays important roles in vital ecosystem functions and is more sensitive to environmental change. However, their environmental driving factors and responses to human disturbances remain less defined.

Optimal emission reductions pathway for polybrominated diphenyl ethers in typical household e-waste dismantling products.

Waste printed circuit boards (WPCBs) and waste epoxy resin powder (WERP) generated after crushing are the most crucial hazardous materials in the recycling process of household e-waste. In this study, a sustainable treatment approach was established in response to the drawbacks of traditional treatment methods. The baseline and hypothetical scenarios were as follows: (1) scenario 1 (S1): WPCBs mechanical treatment, WERP safe landfill; (2) scenario 2 (S2): WPCBs mechanical treatment, WERP imitation stone bricks production.

The decomposition of macrozoobenthos induces large releases of phosphorus from sediments.

Lake eutrophication and algal blooms may result in the mortality of macrozoobenthos. However, it is still not clear how macrozoobenthos decomposition affect phosphorus (P) mobility in sediments. High-resolution dialysis (HR-Peeper) and the diffusive gradients in thin films (DGT) technique were used in this study to assess the dissolved organic matter (DOM), dissolved/DGT-labile iron (Fe), P, and sulfur (S(-II)) profiles at a millimeter resolution.

High cadmium pollution from sediments in a eutrophic lake caused by dissolved organic matter complexation and reduction of manganese oxide.

Eutrophication and metal pollution are global environmental problems. The risk of metal pollution is high in the eutrophic lakes because of high mobility of metal in sediments. However, the mechanism of cadmium (Cd) mobility in sediments is still unclear.