title: Effect of aeration modes on the characteristics of composting emissions and the NH3 removal efficiency by using biotrickling filter.
abstract: A pilot biotrickling filter (BTF) packed with ZX02 fibrous balls as packing material was tested for the treatment of ammonia (NH(3)) released from a composting plant of dairy manure. In order to investigate the effects of three compost aeration modes (mode Co-I, Co-II and In-II) on the NH(3) removal efficiency, a field experiment was continuously carried out for more than eight months. The results demonstrated that under the intermittent aeration mode (In-II), the NH(3) removal efficiency reached 99.2±0.1% when the inlet NH(3) concentration was 7.5-32.3mg m(-3) (9.8-42.5ppmv). The maximum and critical elimination capacity of the biotrickling filter was 22.6 and 4.9g NH(3)m(-3)h(-1), respectively. The effluent concentration of NH(3) was lower than 1.0mg m(-3), which meets the first class discharge standards of GB14554-93. When the concentration of free ammonia in the trickling liquid was varied from 0.1 to 0.4mg L(-1), the nitrification yield was between 47.9% and 103.8%. In addition, the optimum liquid tricking velocity (LTV) of the biotrickling filter was 0.5m(3)m(-2)h(-1) for low inlet concentrations and 2.2m(3)m(-2)h(-1) for high inlet concentrations. Therefore, the use of the biotrickling filter for the compost under the third aeration mode (In-II) yielded an effective optimum NH(3) removal and reduced the nitrogen loss in the compost.
authors.affiliation: Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology, Beijing 100083, 30 Xueyuan Road, Haidian District, Beijing, PR China.
authors.forename: Chuanfu
authors.initials: C
authors.lastname: Wu
authors.forename: Qunhui
authors.initials: Q
authors.lastname: Wang
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Sun
authors.forename: Niantao
authors.initials: N
authors.lastname: Xue
authors.forename: Shu
authors.initials: S
authors.lastname: Liu
authors.forename: Weimin
authors.initials: W
authors.lastname: Xie
mesh_terms: D000332:Aerobiosis; D000397:Air Pollution / Q000517:prevention & control; D000641:Ammonia / Q000378:metabolism*; D000818:Animals; D001673:Biodegradation, Environmental; D002417:Cattle; D005240:Feasibility Studies; D005374:Filtration / Q000295:instrumentation*; D008372:Manure; D012987:Soil; D018505:Waste Management / Q000295:instrumentation / Q000379:methods*
chemical_list: D008372:Manure; D012987:Soil; D000641:Ammonia