Ammonia volatilization is a major process of N （nitrogen） loss that affects the environment. The best way of capturing volatilized ammonia-N could be using zeolite as a good ion exchange medium before it gets either...Ammonia volatilization is a major process of N （nitrogen） loss that affects the environment. The best way of capturing volatilized ammonia-N could be using zeolite as a good ion exchange medium before it gets either volatilized or nitrified. Thus, captured ammonia-N could be used as a source of inorganic nitrogen in ponds to promote algal production without adding additional organic carbon and BOD （biochemical oxygen demand）. The zeolite used for the study was a commercially available zeolite, （CLINZEX） which was a fine powder （CEC （cation exchange capacity） 3.9-4 meq/g）. The experiment was conducted to assess the difference between manure loaded system and zeolite loaded system in terms of water quality, TAN （total ammoniacal nitrogen） release and algal productivity. The difference between the BOD values recorded in both the controls and treatments utilizing chicken manure as source of manure-N remained mostly above 10 ppm. Similarly, the difference between mean COD （chemical oxygen demand） values of control and treatment tanks always remained above 7 ppm. All the experimental tanks loaded with zeolite samples from chicken manure showed range of variation in TAN values （0.018-0.08 mg/1）. The range of values of chlorophyll a （1,029-5,150 mg/m~） recorded in the treatment tanks was higher than the values （54.6-1347 mg/m3） of chlorophyll a in the control tanks. F-test analysis done using highest mean values of BOD, COD, TAN and chlorophyll a showed a highly significant （P 〈 0.01） variation between the treatment and control tanks and at the same time no significant variation was found between time intervals.展开更多
文摘Ammonia volatilization is a major process of N （nitrogen） loss that affects the environment. The best way of capturing volatilized ammonia-N could be using zeolite as a good ion exchange medium before it gets either volatilized or nitrified. Thus, captured ammonia-N could be used as a source of inorganic nitrogen in ponds to promote algal production without adding additional organic carbon and BOD （biochemical oxygen demand）. The zeolite used for the study was a commercially available zeolite, （CLINZEX） which was a fine powder （CEC （cation exchange capacity） 3.9-4 meq/g）. The experiment was conducted to assess the difference between manure loaded system and zeolite loaded system in terms of water quality, TAN （total ammoniacal nitrogen） release and algal productivity. The difference between the BOD values recorded in both the controls and treatments utilizing chicken manure as source of manure-N remained mostly above 10 ppm. Similarly, the difference between mean COD （chemical oxygen demand） values of control and treatment tanks always remained above 7 ppm. All the experimental tanks loaded with zeolite samples from chicken manure showed range of variation in TAN values （0.018-0.08 mg/1）. The range of values of chlorophyll a （1,029-5,150 mg/m~） recorded in the treatment tanks was higher than the values （54.6-1347 mg/m3） of chlorophyll a in the control tanks. F-test analysis done using highest mean values of BOD, COD, TAN and chlorophyll a showed a highly significant （P 〈 0.01） variation between the treatment and control tanks and at the same time no significant variation was found between time intervals.
