Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (5): 177-181.doi: 10.11924/j.issn.1000-6850.2014-2564

Special Issue: 土壤重金属污染 畜牧兽医

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The Study of Pollution Control of Wastewater and Air for Scale Pig Farm

Yang Fulin1, Gao Fei2, Zhou Chunxiao3, Wu Houzhang1   

  1. (1College of Resources and Environment, Anhui Agricultural University, Hefei 230036;2Chuzhou University, Chuzhou Anhui 239000;3The Thirty-second High School of Hefei City, Hefei 230051)
  • Received:2014-09-22 Revised:2014-10-27 Accepted:2014-11-03 Online:2015-03-20 Published:2015-03-20

Abstract: In order to explore the feasibility of pollution control measures and to provide a reference of pollution control for the same type farm, the study for the pollution control measures of farm pollutant concentration in the waste gas and waste water was conducted. Malodorous gases and combustion waste gas of boiler were treated by activated carbon adsorption and water film soot collector respectively; wastewater was treated by anaerobic fermentation and CASS process. To monitor the concentration of ammonia (NH3) and hydrogen sulfide (H2S), gas samples which were marked as a and b respectively were collected in the inlet and outlet of activated carbon adsorption tower. To monitor the concentration of sulfur dioxide (SO2) and soot, gas samples which were marked as c and d respectively were collected in the inlet and outlet of water film soot collector. 2 L water sample which was marked as sample A was collected at the digester inlet; 2 L water sample was collected at the digester outlet after fermentation anaerobic digestion for 20 days, 30 days and 40 days, marking as B, C and D, respectively; 2 L water sample was collected in CASS sewage treatment pond outlet, marking as sample E. Then the values of chemical oxygen demand (CODcr), biochemical oxygen demand (BOD5), suspended solids (SS), ammonia nitrogen (NH3-N) and total phosphorus (TP) could be monitored. Three parallel samples were taken every time. The results showed that the intensity of the ammonia in gas b was significant lower than that in gas a, and the intensity of hydrogen sulfide in gas b was extremely significant lower than that in gas a. There had no significant difference between gas c and gas d about the concentration of SO2, and the concentration of soot in gas d was extremely significant lower than that in gas c. The concentration of chemical oxygen demand, biochemical oxygen demand and suspended solids in sample B, C, D and E were extremely significant lower than that in sample A. The value of ammonia nitrogen and total phosphorus in water sample E was extremely significant lower than that in sample A, B, C and D; there had no significant difference among sample A, B, C and D. Activated carbon adsorption treatment had significant effect on ammonia, and had an extremely significant effect on hydrogen sulfide; water film soot collector had significant effect on sulfur dioxide, also had extremely significant effect on soot. Pure anaerobic fermentation treatment had significant effect on chemical oxygen demand, biochemical oxygen demand and suspended solids, but had no significant effect on ammonia nitrogen and total phosphorus. The treatment of CASS process combined anaerobic fermentation had extremely significant effect on chemical oxygen demand, biochemical oxygen demand, suspended solids, ammonia nitrogen and total phosphorus. Except sulfur dioxide, pollutant concentrations were able to reach the standards after treatment.