Enhanced nitrogen and phosphorus removal by an advanced simultaneous sludge reduction, inorganic solids separation, phosphorus recovery, and enhanced nutrient removal wastewater treatment process.
An advanced wastewater treatment process (SIPER) was developed to simultaneously decrease sludge production, prevent the accumulation of inorganic solids, recover phosphorus, and enhance nutrient removal. The feasibility of simultaneous enhanced nutrient removal along with sludge reduction as well as the potential for enhanced nutrient removal via this process were further evaluated. The results showed that the denitrification potential of the supernatant of alkaline-treated sludge was higher than that of the influent. The system COD and VFA were increased by 23.0% and 68.2%, respectively, after the return of alkaline-treated sludge as an internal C-source, and the internal C-source contributed 24.1% of the total C-source. A total of 74.5% of phosphorus from wastewater was recovered as a usable chemical crystalline product. The nitrogen and phosphorus removal were improved by 19.6% and 23.6%, respectively, after incorporation of the side-stream system. Sludge minimization and excellent nutrient removal were successfully coupled in the SIPER process.
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science, Chongqing 400714, China. Electronic address: yanpengstu@163.com.
Peng
P
Yan
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science, Chongqing 400714, China.
Jin-Song
JS
Guo
Chongqing Vocational College of Architectural Engineering, Chongqing 400072, China.
Jing
J
Wang
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science, Chongqing 400714, China.
You-Peng
YP
Chen
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China.
Fang-Ying
FY
Ji
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science, Chongqing 400714, China.
Yang
Y
Dong
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science, Chongqing 400714, China.
Hong
H
Zhang
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science, Chongqing 400714, China.
Wen-juan
WJ
Ouyang
D000468:Alkalies / Q000494:pharmacology; D001673:Biodegradation, Environmental / Q000187:drug effects; D057919:Biological Oxygen Demand Analysis; D002244:Carbon / Q000494:pharmacology; D058440:Denitrification / Q000187:drug effects; D005232:Fatty Acids, Volatile / Q000032:analysis; D007287:Inorganic Chemicals / Q000302:isolation & purification*; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000032:analysis; D009584:Nitrogen / Q000302:isolation & purification*; D010758:Phosphorus / Q000302:isolation & purification*; D012722:Sewage / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D000468:Alkalies; D002244:Carbon; D005232:Fatty Acids, Volatile; D007287:Inorganic Chemicals; D009566:Nitrates; D009573:Nitrites; D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater
Alkaline-treated sludge; Chemical phosphorus recovery; Enhanced nutrient removal; Internal carbon source; Sludge reduction