过量混合污泥的堿性溶解及释放磷回收为磷酸铵镁。
Alkaline solubilization of excess mixed sludge and the recovery of released phosphorus as magnesium ammonium phosphate.
机构信息
Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China; State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen 518001, China; Shenzhen Key Laboratory of Emerging Contaminants Detection & Control in Water Environment, Shenzhen 518001, China.
Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China; State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen 518001, China; Shenzhen Key Laboratory of Emerging Contaminants Detection & Control in Water Environment, Shenzhen 518001, China.
出版信息
Bioresour Technol. 2018 Feb;249:783-790. doi: 10.1016/j.biortech.2017.10.065. Epub 2017 Oct 26.
The alkaline solubilization of excess mixed sludge was investigated and subsequently the released phosphorus was recovered as magnesium ammonium phosphate (MAP). Considerable and rapid release of glycogen and protein was encountered after alkaline addition into the sludge. Only 45.0% of sludge cells were destructed after 240 min treatment in R1 while the corresponding ratio was 96.1% in R3 according to the release of DNA. Non-apatite inorganic phosphorus (NAIP) in the alkaline treated sludge decreased due to the dissolution of Al(OH) and AlPO, which was the dominant reason for phosphorus release. Soluble orthophosphate (SOP) in the supernatant of alkaline treated sludge could be recovered quickly with the recovery efficiency of 84.6% within 5 min and about 53-55% of P participated in MAP reaction, producing large amounts of acicular crystals.
研究了过量混合污泥的堿性溶解，并随后将释放的磷回收为磷酸铵镁（MAP）。堿性物质加入污泥后，会遇到大量且快速的糖原和蛋白质释放。根据 DNA 的释放，在 R1 中处理 240 分钟后，只有 45.0%的污泥细胞被破坏，而在 R3 中，这一比例为 96.1%。由于 Al(OH)和 AlPO 的溶解，堿性处理污泥中的非磷灰石无机磷（NAIP）减少，这是磷释放的主要原因。堿性处理污泥上清液中的可溶性正磷酸盐（SOP）可迅速回收，在 5 分钟内回收效率为 84.6%，约 53-55%的 P 参与 MAP 反应，生成大量针状晶体。
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