Study On The Treatment Teachnology Of Neomycin Sulfate Wastewater

Neomycin sulfate wastewater,a kind of high concentration organic wastewater with relatively high concentrations of COD,sulfate and total nitrogen,which is difficult to be degraded.In this paper,the experiment examined the effect of neomycin sulfate on anaerobic digestion was examined firstly.Secondly,the anaerobic biodegradation experiment of neomycin sulfate was studied by UASB.Then,the biological nitrogen removal of UASB effluent experiment was investigated by SBR.Finally,a deep treatment of SBR effluent was treated with Fenton oxidation method.The quality of effluent could be up to the discharge standard of"discharge standards of water pollutants for pharmaceutical industry"?GB21903-2008?.Findings are as follows:1)The effect of neomycin sulfate on anaerobic digestion showed that different concentrations of neomycin sulfate caused different degrees of inhibition to anaerobic digestion.The concentration of neomycin sulfate with 300⁹00mg·L^-11 had mild inhabitation on anaerobic digestion.When neomycin sulfate concentration up to1200mg·L^-1,the anaerobic digestion was moderately inhibited.2)With the 24h of hydraulic residence time and the 5.2kg-COD?m^-3·d^-11 of volume loading in UASB,when the influent contained:COD 5 000⁵ 500mg·L^-1,sulfate600⁶50mg·L^-11 and total nitrogen 700⁷50mg·L^-1,COD,sulfate and ammonia nitrogen in effluent could be decreased to 1 200¹ 400mg·L^-1,15²0mg·L^-11 and 600⁶50mg·L^-1,respectively.The removal rate of COD reached 70%.The results showed that the UASB reactor was feasible for neomycin sulfate wastewater treatment.3)The SBR reactor was used to treat the effluent from UASB reactor in order to remove the ammonia nitrogen.The influent contained COD 1 200¹ 400mg·L^-1and ammonia nitrogen 600⁶50mg·L^-1.The optimum process condition consisted a 6h anoxic period and a 10h aerobic period,which was determined by optimizing tests.After SBR treatment,COD and ammonia nitrogen in the effluent were decreased to 400⁵00mg·L^-1and 12¹6mg·L^-1,with the removal rate of 65%and 95%,respectively.4)Fenton reagent was studied on advanced treatment of neomycin sulfate wastewater.The results of advanced treatment of SBR effluent with Fenton oxidation method showed that the optimum conditions for COD removal were consist of the initial pH at 3.0,the ratio of Fe²⁺/H₂O₂ at 1:15,the amount of 30%H₂O₂ at 5‰and the reaction time at 40min.Under the optimum conditions,the removal rate of COD was more than 80%.The COD of effluent was less than 200mg·L^-1,which reached the discharge standard of"discharge standards of water pollutants for pharmaceutical industry"?GB21903-2008?.