The Research On A Novel Anammox Reactor Packed With Fe-C Electrode To Enhance Treatment Of Swine Wastewater

Large scale swine has brought economic development also broughtenvironmental pollution problems. In China, the swine wastewater treatment anddisposal compared with the developed countries is lagging behind. Pig produce a lotof manure and wastewater in the process, many without the use and effectivetreatment or disposal, but directly discharged into water or soil. The huge amount ofswine wastewater goes beyond environmental absorptive capacity, caused seriouspollution in the water and soil around, lead swine wastewater became a major sourceof agricultural pollution in contemporary society. How to effectively treat the swinewastewater has become an important part of current environmental protection.Meanwhile piggery wastewater is also the total volume control target for major cutsduring the Twelfth Five-Year Guideline. A novel Anammox reactor packed with Fe-Celectrode to enhance treatment of swine wastewater, reveals its startup characteristicsand processing performance, laid foundation for advanced nitrogen removaltechnology of swine wastewater research. The major conclusions are as follows:1) In conditions of temperature (35±1℃), nitrification, denitrification andanaerobic sewage sludge sewage sludge used as inoculated sludge can successfulstartup of anaerobic ammonium oxidation in conventional UASB reactor andenhancement of zero-valent iron UASB reactor; Enhancement of zero-valent ironUASB reactor starts time consuming93d, shorten than conventional UASB reactor39d. NH4+-N and NO2-N removal rate of two reactor can reach above98%in stableoperate phase. Reactor start-up phase can be divided into4stages, namely anammoxbacterium appeared sluggish activity, activity, activity increased and the stable phase.2) Enhancement of zero-Valent iron sludge granulation in UASB reactors fasterthan conventional UASB reactor, When0.6V voltage applied to electrical enhancezero-valent iron UASB reactor R1, in the next73days of anaerobic granular sludgeparticle size increased from an average of0.3mm to3.0mm.3) Artificial simulated wastewater start reactor after61days of operation issuccessful to deal with the swine wastewater and running stability, NH4+-N removal rate is more than85%, NO2-N removal rate is more than95%, TN removal rate basicremain at90%, COD removal rate is more than90%.4) High concentrations of organic matter doesn’t have a significant inhibitory tothe anammox bacteria activity in zero-Valent iron UASB reactor, After GC-MS andthermodynamics analysis, prove that the reactor is also exist denitrification reaction,anaerobic ammonia oxidation reaction is still dominant role in the reactor, Itscontribution to TN removal rate is54.1%~93.3%, denitrification and other reactionsis6.7%~45.9%.5) Extract anaerobic granular sludge genome from electricity enhancedzero-valent iron anaerobic ammonia oxidation reactor for PCR amplification,Sequencing of the16S rDNA amplification products and Blast. Results show that thedominant functional bacteria in reactor primarily for the genus Pseudomonas,similarity of up to97%. The species has strong anaerobic ammonia oxidation and thedenitrification ability.