Nitrogen and Phosphorus Removal for Swine Wastewater by Ammonium Crystallization and Intermittent Aeration Process
Resource
Journal of Environmental Science and Health, pt.B v.30 n.5 p.733-758
Journal
Journal of Environmental Science and Health
Pages
-
Date Issued
1995
Date
1995
Author(s)
Abstract
A process on crystallized precipitation of ammonium by adding magnesium salt and phosphate was carried out to improve C/N ratio in swine wastewater. After completion of crystallized precipitation of ammonium, an intermittent aeration process with aeration and nonaeration periods alternated at interval of 1:1 hr day-1 is used for the improved swine wastewater (T-N/BOD = 0.14: BOD = 8200 mg/liter and T-N = 1166 mg/liter). The results obtained from the experiment show that the removal ratios of T-N and NH4-N are 91% and 99%, respectively. T-P is not removed, while the removal ratio of PO4-P is 60% as 3% of CaCl2 liquid is added. The results also indicate that dilution with water is effective to improve the removal of phosphorus even if raw swine wastewater contains high concentrations of T-N, T-P, BOD, and TOC.
SDGs
Type
journal article