atomized spraying%biological deodorants%NH3%H2S%continuous monitoring%manure cleaning process

The purpose of the experiment was to study the application effect of atomized spraying bio-logical deodorant in pig houses in different manure cleaning processes.Relevant tests were carried out in a blister dung fattening farm in Jurong City,and in a dry collection fattening farm in Changxing County.The same biological deodorant product was used in 2 trials,each lasting for a total of 10 days.The deodorant was applied on the 5th day,the 2nd-4th day was selected as the control group and the 5th-9th day as the experimental group.The test group was manually sprayed 6L deodorant in the pig house twice a day,and the concentration of ammonia(NH3)and hydrogen sulfide(H2S)in the house was continuously monitored during the test.The results showed that after being treated with deodorant for 3 days,the concentrations of NH3 and H2S in the blister dung house reached the bottom,which were 2.24 mg/kg and 0.11 mg/kg,respectively.The removal rates were 73.08％and 72.50％,respectively,significantly lower than those in the control group(P＜0.01).In the dry collection house,the NH3 concentration decreased to the lowest of 5.22 mg/kg after 5 days of treatment,with a removal rate of 52.65％.Additionally,the H2S concentration reached its lowest of 0 mg/kg after 2 days of treatment,resulting in a removal rate of 100％,significantly lower compared to control group(P＜0.01).These findings showed that spraying biological deodorant in the house effectively reduces NH3 and H2S concentrations in the blister dung house and dry collection house.