1.
Stimulation of methanogenesis in anaerobic digesters treating leachate from a municipal solid waste incineration plant with carbon cloth.
Lei, Y, Sun, D, Dang, Y, Chen, H, Zhao, Z, Zhang, Y, Holmes, DE
Bioresource technology. 2016;:270-276
Abstract
Bio-methanogenic digestion of incineration leachate is hindered by high OLRs, which can lead to build-up of VFAs, drops in pH and ultimately in reactor souring. It was hypothesized that incorporation of carbon cloth into reactors treating leachate would promote DIET and enhance reactor performance. To examine this possibility, carbon cloth was added to laboratory-scale UASB reactors that were fed incineration leachate. As expected, the carbon-cloth amended reactor could operate stably with a 34.2% higher OLR than the control (49.4 vs 36.8kgCOD/(m3d)). Microbial community analysis showed that bacteria capable of extracellular electron transfer and methanogens known to participate in DIET were enriched on the carbon cloth surface, and conductivity of sludge from the carbon cloth amended reactor was almost twofold higher than sludge from the control (9.77 vs 5.47μS/cm), suggesting that microorganisms in the experimental reactor may have been expressing electrically conductive filaments.
2.
Soil microbial activities and carbon and nitrogen fixation.
Chen, G, Zhu, H, Zhang, Y
Research in microbiology. 2003;(6):393-8
Abstract
Soil microbial activity that reflects microbiological processes of soil microorganisms is the potential indicator of soil quality, as plants rely on soil microorganisms to mineralize organic nutrients for growth and development. Soil microorganisms also process plant litter and residues into soil organic matter, a direct and stable reservoir of carbon and nitrogen that consists of living and dead organic materials subject to rapid biological decomposition. In natural systems, the action of soil microorganisms is a major determinant of efficient nutrient cycling. This paper reviews the current state of knowledge on the fate of soil microorganisms in terms of carbon and nitrogen fixation.
3.
Metabolic signalling and carbon partitioning: role of Snf1-related (SnRK1) protein kinase.
Halford, NG, Hey, S, Jhurreea, D, Laurie, S, McKibbin, RS, Paul, M, Zhang, Y
Journal of experimental botany. 2003;(382):467-75
Abstract
A protein kinase that plays a key role in the global control of plant carbon metabolism is SnRK1 (sucrose non-fermenting-1-related protein kinase 1), so-called because of its homology and functional similarity with sucrose non-fermenting 1 (SNF1) of yeast. This article reviews studies on the characterization of SnRK1 gene families, SnRK1 regulation and function, interacting proteins, and the effects of manipulating SnRK1 activity on carbon metabolism and development.