[The treatment of odor containing hydrogen sulfide released in the wastewater of pharmaceutical factory by high efficient bio-reactor with the packed stuffing].

The removal experiment of odor containing hydrogen sulfide(H2S) from sewage disposal plant of pharmaceutical factory was carried out continuously by biological deodorization reactor packed with ZX01 stuffing. The results suggested that removal efficiency of hydrogen sulfide was nearly 100% and metabolism products of H2S was mainly composed of SO4(2-), when the maximum influent load of the bio-reactor was 204 g/(m3.h). When effluent wastewater from second setting pit was used as spray water which containing a small quantity of nitrogen, phosphorus and other elements, the optimum volume of spray water was 3.56 L/(L.d). The bio-reactor had stronger ability to resist shock of high concentration load. The bio-reactor was not blocked during experiment of six months in which resistance was maintained at lower value, therefore, the bio-reactor need not carry out a back washing frequently, and it can be operated steadily for long-term.