Transformation of phosphorus forms in the construction process of phosphate reduction system of hypersaline and high-phosphorus wastewater

• Published in: Huanjing kexue Vol. 30; no. 9; p. 2592
• Main Authors: Chen, Yao, Long, Teng-Rui, Zhou, Jian, Liu, Jun, Gan, Chun-Juan
• Format: Journal Article
• Language: Chinese
• Published: China 01.09.2009
• Subjects: Bioreactors - microbiology; Oxidation-Reduction; Phosphates - chemistry; Phosphates - metabolism; Phosphorus - chemistry; Phosphorus - isolation & purification; Phosphorus - metabolism; Phosphorus Compounds - chemistry; Phosphorus Compounds - metabolism; Sewage - chemistry; Sodium Chloride - analysis; Sodium Chloride - chemistry; Waste Disposal, Fluid - methods
• ISSN: 0250-3301

Transformation of phosphorus forms in the construction process of biological phosphate reduction system was discussed in treating saline and high-phosphorus pickled mustard tube wastewater to resolve problems encountered with present phosphorus removal technology. A phosphate reduction system under hypersaline condition (salinity, 7% , measured by NaCl) was successfully constructed, when the reactor was started with 3% salinity wastewater and the salinity was increased through two stages, at influent organic loading (COD) 0.45 kg x (m3 x d)(-1), phosphorus loading (PO4(3-)-P) 5.0 g x (m3 x d)(-1), DO 6 mg/L, 30 degrees C and without sludge discharge. Phosphorus balance and transformation of phosphorus forms in sludge was studied on 26 running cycles of this phosphorus reduction system. Results show that averagely 41.8 mg x L(-1) of external phosphorus gets lost per day, and that 155 mg of internal phosphorus in sludge gets lost through the path of phosphorus forms transformation and phosphate reduction, which