کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4388275 | 1617972 | 2007 | 5 صفحه PDF | دانلود رایگان |
Suitability of CW systems for treatment of wastewater from small slaughterhouse of pigs was tested. In the first part of the experiment, a system comprising two VF (vertical flow constructed wetlands) and an HF (horizontal flow constructed wetlands) was used. In the second part, VF + HF system was used with recirculation of outflow from VF to sedimentation tank in the range 100 to 200%.The experiment showed that sand and gravel beds of VF can be very effective in removal of organic substances, TSS and NH4-N from strong wastewater, BOD5reaching an average of 2500 gO2m−3, TSS - 560 gm−3, NH4-N - 400 g Nm−3, and Ntot - 500 gN-m−3. The hybrid system of 2VF + HF removed only 78.2% N24tot. Application of recirculation, depending on the extent, raised this index to as high as 85.7–96.6%. Unexpectedly low was the effectiveness of denitrification in gravel bed of HF.
Journal: Ecohydrology & Hydrobiology - Volume 7, Issues 3–4, 2007, Pages 339–343