Research On Fishmeal Exhaust Gas Purification Equipment Based On The Technology Of TiO₂Photocatalyst

Fish meal is rich in high quality and the necessary nutrients （protein）, the equilibriumcomposition of amino acids, essential fatty acids and energy, it is an integral part of thevast majority of aquaculture and livestock feed. It is mainly used in aquaculture, livestockand human health. However, fishmeal in machining process produce large amounts ofwaste gas polluted the environment, which influences people’s life and health of body andmind. Nano titanium dioxide （TiO₂） light catalyst has a series of excellent performancesuch as high catalytic activity, light photochemical stability, security, non-toxic, low costof and etc., which got a lot of applications in many fields, especially in the aspect ofenvironment purification whose TiO₂shows a good application prospect, it is said thatTiO₂is a kind of very promising photo catalyst. Therefore, the research based on the TiO₂photo catalyst technology for fish waste gas purification equipment is of great importance.This article mainly discusses the key technology of the fish meal waste gasdegradation device, large area（greater than10cm×10cm） Ti/TiO₂nanotube array photocatalytic net （sheet） for electrochemical anodic oxidation method process was studied,performance characterization for the Ti/TiO₂nanotube array photo catalytic net on themorphology, structure, and ultraviolet absorption using SEM, XRD, and UV-Vis uv-visdiffuse reflection spectrum was done; the photoelectric performance test usingElectrochemical workstation for the Ti/TiO₂nanotube array electrode i-v curve and opticalvoltage response curves was also done; with10mg/L methyl orange solution as targetdegradation of, high pressure mercury lamp as light source, exposure of1h was done, theTi/TiO₂nanotube array photo catalytic degradation test was done; we designed thetitanium dioxide photo catalysis fishmeal exhaust gas purification device, and tested theactual test on the performance of the device degradation of fish waste gas. The followingresults have been obtained through the research:（1） The electrochemical anodic oxidation preparation of large area （10cm by10cm）Ti/TiO₂nanotube array photo catalyst technology: titanium mesh as anode, another of thesame area of the titanium mesh as cathode, the dc voltage is20v, electrolyte NH₄F: H₂O:C₃H₈O₃is1:20:79wt%, anodic oxidation time is usually45minutes at room temperature,heat treatment temperature is500℃, the heat treatment time is2h.（2） The produced Ti/TiO₂nanotube array structure is tidy at the working voltage of20v, aperture is around50nm, it has great adsorption surface area; The Ti/TiO₂nanotube array is composed of anatase and rutile phase, but anatase is the main crystal phase; theabsorption edge of Ti/TiO₂nanotube array is385nm, which can absorb of uv light belowwavelength385nm; Optical performance was measured to show that the produced Ti/TiO₂nanotube array photo catalyst under uv irradiation at20V has good photoelectric effect,current rapidly is increase to0.034mA, scanning voltage is0.5V （vs. SCE）, photocurrentcan reach1.3mA/cm².（3） The research on the target content the degradation of methyl orange degradationeffect shows that when the voltage is20v, degradation rate of methyl orange of theproduced Ti/TiO₂nanotube array light catalytic is fastest, which reach95%in2hours.（4） The degradation performance test of fishmeal exhaust gas through Designedapparatus showed that under uv light irradiation, the flow rate of100ml/min fishmealexhaust through the Ti/TiO₂network can act as the degradation effect, and the degradationeffect along with the increase in the number of TiO₂is better.