The treatment of animal manure wastewater by coupled simultaneous methanogenesis and denitrification (SMD) and shortcut nitrification–denitrification (SND)

Abstract

BACKGROUND The anaerobic–aerobic system is considered an efficient process for simultaneous removal of organic matter and nitrogen from animal manure wastewater. In this work, coupled simultaneous methanogenesis and denitrification (SMD) and shortcut nitrification–denitrification (SND) was investigated to treat animal manure wastewater having high concentrations of nitrogen and organic matter. RESULTS The best COD and NO2−‐N removal efficiency was achieved when the influent COD loading rate in the anaerobic reactor was 3 kg m‐3 d−1 and the COD/NO2−‐N ratio was above 30. It was advantageous to the treatment of high‐strength ammonia animal manure wastewater to adopt SND when the pH and free ammonia were about 8.0 and 18 mg L−1, respectively. The average efficiency of of removal COD, NH4+‐N, and total nitrogen when adopting the coupling technology was 96.7%, 94.9% and 86.5%, respectively, and the nitrite accumulation rate reached 94.55%. CONCLUSION This study suggested that it was technically feasible to adopt SMD–SND coupling technology of to treat animal manure wastewater with high concentrations of nitrogen and organic matter. © 2013 Society of Chemical Industry © 2013 Society of Chemical Industry

Shortcut Nitrification and Denitrification in MBBR controlled by Inhibitor

“…When the operation was stable the biofilm on the filler in the reactor dosing methanoic acidhydrazine 2 containing a large number of microbial micelles. The SEM images showed that there was exist filamentous bacteria both in the reactor dosing methanoic acid-hydrazine 2 and in the reactor without methanoic acid-hydrazine 2 , and the filamentous bacteria created favorable conditions for the attachment and growth of microorganisms. The microbes in the biofilm were closely arranged and the amount of microbial biomass in the biofilm of the reactor dosing methanoic acid-hydrazine 2 was more abundant than that in the reactor without methanoic acid-hydrazine 2 .…”

“…Shortcut nitrification reduces the cost of wastewater treatment and at the same time makes it possible to efficiently remove nitrogen from wastewater with low carbon to nitrogen ratio [1][2]. There are many factors affecting shortcut nitrification and denitrification, such as pH, DO, temperature, SRT [3][4].…”

Effect of Aeration and Recirculation in the Removal of Nitrogen and Chemical Oxygen Demand From Sanitary Sewage in a Structured Bed Reactor

“…Guadie et al (2013) did not perceive a significant difference in the COD removal and N-NH4 + from sanitary sewage in a membrane reactor when the pH ranged from 7.5 to 9.5. He et al (2014) evaluated the influence of pH values of 7.5 to 9.0 on SND and observed better reactor performance with pH values lower than 8.0.…”

Simultaneous degradation efficiency of C-MFCs for three pollutants in aquaculture wastewater

“…Currently, there are various techniques, including physical, physical and chemical methods, and biological methods, but these methods still have some deficiencies and need to be improved. (Suzuki et al, 2007;He et al, 2014) For example, physical processes, which mainly include mechanical filtration and foam separation technologies, can only remove large particles of pollutants and are very ineffective in removing soluble organic pollutants. The chemical method mainly uses chemical oxidation to remove soluble organic pollutants in water, but the cost is high and it is easy to cause secondary environmental pollution.…”