固定化微生物处理含氨臭气的研究

Deodorization of NH_3 gas by use of immobilized biocatalyst beads

采用海藻酸钙包埋固定化生物颗粒，利用固定床反应器处理含氨臭气的研究结果表明，系统的脱臭、硝化效果较好；其气相ＮＨ３去除率在９２％以上，固定化生物颗粒的硝化速度大于０．６３ｇＮ／ｋｇ固定化湿颗粒·ｄ，远高于土壤及生物膜ＮＨ３气脱臭法。对进气ＮＨ３－Ｎ负荷、ｐＨ值、水份喷淋密度与硝化、脱臭效果的关系研究结果表明，系统获得高效脱臭、硝化效果的最佳进气负荷为３．９９ｇＮ／ｋｇ固定化湿颗粒·ｄ，ｐＨ值为７．０～８．０，淋洗密度为０．６１ｍ３／ｍ２塔截面·ｄ。

deodorization treatment of NH_3 gas by use of biocatalyst beads immobilized with calcium alginate was studied.The results show that the efficiency of deodorization and nitrification is very high.The removal rate of NH_3 is more than 92% and the nitrification rate of immobilized beads is more than 0. 63g N/kg immobilized beads(wet)·d,which is much higher than other deodorization techniques such as soil or biofilm treatment.The effect of NH_3-N load,pH and the density of sprinking on the efficiency of deodorization and nitrification is also discussed in this paper.The study shows that getting the high rate of deodorization and nitrification,the optimum load of the system is 3.99g N/kg immobilized beads(wet)·d,the denstity of sprinking is 0.61 m3/m2 sectional area·d and the optimum pH for nitrification ranges between 7.0～8.0.