Sodium Persulfate and Potassium Permanganate Inhibit Methanogens and Methanogenesis in Stored Liquid Dairy Manure

摘要: Stored liquid dairy manure is a hotspot for methane (CH) emission, thus effective mitigation strategies are required. We assessed sodium persulfate (NaSO), potassium permanganate (KMnO), and hypochlorite (NaOCl) impacts on the abundance of microbial communities CH production in manure. Liquid treated with different rates (1, 3, 6, 9 g or mL L slurry) these chemicals their combinations were incubated under anoxic conditions at 22.5 ± 1.3°C 120 d. Untreated 2-bromoethanesulfonate (BES)-treated manures included as negative positive controls, respectively, whereas sulfuric acid (HSO)-treated was used reference. Quantitative real-time polymerase chain reaction to quantify abundances bacteria methanogens Days 0, 60, 120. Headspace CH/CO ratios proxy determine production. Unlike bacterial abundance, methanogen varied treatments. Addition 1 slurry NaSO KMnO reduced (up ∼28%) peak 92-fold). Except lowest rate, chemical also ∼17%) ninefold), although no observed when 3% NaOCl alone. With acidification, up twofold, unaffected. Results suggest that may offer alternative options reduce emission from stored manure, but this warrants further assessment larger scales environmental characteristics