|
| Pretreatment effect of wastewater from cattle farmbefore its resource utilization |
| |
| DOI：10.16768/j.issn.1004-874X.2016.12.010 |
|
| Hits: 2330 |
| Download times: 808 |
| Abstract: |
| Solid-liquid separation，precipitation，ultrasonic oscillation and bio-chemical treatment methods
were used to treat wastewater in cattle farm before its utilization. Wastewater were separated before entered
precipitation tank and reduced 7.14% suspended solids，97.27% fecal coliform numbers and 82.51% COD contents.
Effects of agent addition（ CaO and CaCN2） and ultra-sonic oscillation treatment were compared and discussed. The
results showed that the increase of agent addition ratios to wastewater increased the transmittance，shortened the
time to clarification，and increased the electric conductivity，decreased the total phosphorus content，but had little
influence on potassium content. Addition of CaO 5 g/kg decreased fecal coliform number to 0，and increased the
transmittance to over 90% after 2 days. Addition of CaCN2 5 g/kg decreased fecal coliform number to 0，and increased
the transmittance to over 95% after 1 day，and increased total nitrogen content to 600 mg/kg after 3 days. While
ultrasonic oscillation treatment had little influence on these detection indexes. The study suggested that wastewater
from cattle farm could be resource utilization through integrative pipes of water and fertilizer locally after separated
from solid wastes，treatment in precipitation tank，and addition of proper ration agent. It provided a basis for quick
treatment of cattle farm wastewater before its safely resource utilization. |
|
View Full Text
View/Add Comment Download reader |
