[Rapid Start-up of a Nitrite-Dependent Methane Anaerobic Oxidation Reaction Under Static Pressure Conditions].

The present study explores the effect of static pressure on the rapid start-up of a nitrite-dependent anaerobic methane oxidation (N-DAMO) process in lab-scale sequencing batch reactors (SBR). A mixture of anaerobic sludge and deep paddy soil with a volume ratio of 1:1 was used as inoculum and the influent of the nitrite (NO-N) concentration was gradually increased to avoid a toxicity shock. The variation of the NO-N removal performance and corresponding microbial characteristics were analyzed to evaluate the development of the N-DAMO process.

Optimization of a nitrite-dependent anaerobic methane oxidation (n-damo) process by enhancing methane availability.

The nitrite-dependent anaerobic methane oxidation (n-damo) process is believed to have good application prospects, but its development is limited by the low growth rate and low specific activity of n-damo bacteria. In this study, immobilized biologically activated carbon (IC) and high static pressure (HP) were investigated to improve the performance of the n-damo process by enhancing methane availability. Both IC and HP improved the activity of n-damo bacteria, and the highest n-damo specific activity was obtained in the HP-IC system, which reached 47.

Effect of trace elements on the development of co-cultured nitrite-dependent anaerobic methane oxidation and methanogenic bacteria consortium.

The aim of this work was to study the effects of key trace elements (i.e., iron, copper and molybdenum) on the development of co-cultured n-damo and methanogenic bacteria consortium, which could realize in situ CH production and utilization.

Improvement of aquaponic performance through micro- and macro-nutrient addition.

Aquaponics is one of the "zero waste" industry in the twenty-first century, and is considered to be one of the major trends for the future development of agriculture. However, the low nitrogen utilization efficiency (NUE) restricted its widely application. To date, many attempts have been conducted to improve its NUE.

Reduction of greenhouse gases emissions during anoxic wastewater treatment by strengthening nitrite-dependent anaerobic methane oxidation process.

Nitrite-dependent anaerobic methane oxidation (n-damo) is a recently discovered process performed by NC10 phylum, which plays an important role in greenhouse gases (GHG) reduction. In this study, co-existence of n-damo bacteria and methanogens was successfully achieved by using upflow anaerobic sludge blanket (UASB) reactor. Reactor with inorganic carbon source (CO/H) showed the highest abundance of n-damo bacteria and the highest n-damo potential activity, resulted in its highest nitrogen removal rate.