Abstract— Piggery wastewater is a type of wastewater which contains large amounts of nitrogen and phosphorus, therefore it needed to be treated before releasing to directly to the environment. The combination between struvite precipitation and nitrogen removal and poly-P bacteria into wastewater for piggery wastewater treatment has been found to be a cost-effective practice, a iable technology in terms of environmental protection and sustainability, especially in the developing-countries. For optimum struvite crystallization from piggery wastewater, the Mg:PO4 molar ratio as (1.2:1) was used, the pH of reaction was adjusted to 9 and the sample was stirred continuously during 40 minutes. The supernatant sample was then added 1% nitrogen removal bacteria (Pseudomonas stutzeri D3b strain) and 1% poly-P bacteria (Kurthia sp. TGT1013L strain), 5 g glucose/L and aeration 12/24h during 3 days, ammonium concentration reduced significantly from 1271 mg/L to 1.2 mg/L and orthophosphate concentration decreased noticeably from 24.91 mg/L to 16.1 mg/L.
Keywords— ammonium, bacteria, orthophosphate, pH, piggery wastewater, struvite precipitation.
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