The influences of iron and calcium carbonate (CaCO3) addition in wastewater treatments reactors performance were investigated. Adding different concentrations of Fe3+ (5, 10, 30 and 50 mmol/m3), iron and CaCO3 powder led to changes in algal characteristics and physico-chemical and microbiological properties. According to the investigation results, nutrient removal efficiency in algae based reactors was obviously increased by the addition of 10 mmol/m3 Fe3+, iron (5 mmol/m3) and CaCO3 powder (0.2 g m−3) and the removal efficiencies of BOD5, TN, and TP in Stage 2 were respectively increased by 28%, 8.9%, and 22%. The improvements in physico-chemical performances were verified by microbial community tests (bacteria quantity, activity and community measured in most probable number, extracellular enzymes activity, and Biolog Eco Plates). Microbial variations indicated the coexistence of Fe ions and carbonate–bicarbonate, which triggered the synergistic effect of physico-chemical action and microbial factors in algae based reactors.
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· Whiteness: 90-95%
· Brightness: 85%
· Calcium content: 38%
· Fe2O3 content <0.05%
· MgO content <0.06%
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No.18 Son Ha Minerals Company Limited
Factory: Mam Xoi Mountain, Thanh Son Commune, Kim Bang District, Ha Nam Province, VN
Telephone: +84 931 717 698 Fax: +84243.5190937
Hotline: +84 932 222 698 (Ms. Anna) / +84 931 717 698 (Mr. Henry)
Email: email@example.com (Ms. Anna) // firstname.lastname@example.org (Mr. Henry)
Sources: Bioresource Technology