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A heterotrophic nitrification-aerobic denitrification bacterium Halomonas venusta TJPU05 suitable for nitrogen removal from high-salinity wastewater

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 13-22页

作者： Quanli Man Peilian Zhang Weiqi Huang Qing Zhu Xiaoling He Dongsheng Wei State Key Laboratory of Separation Membrane and Membrane Process School of Environmental Science and EngineeringTiangong UniversityTianjin 300387China School of Chemistry Tiangong UniversityTianjin 300387China Key Laboratory of Molecular Microbiology and Technology Ministry of EducationCollege of Life ScienceNankai UniversityTianjin 300071China

A novel salt-tolerant heterotrophic nitrification and aerobic denitrification(HN-AD)bacterium was isolated and identified as Halomonas venusta TJPU05(*** TJPU05).The nitrogen removal performance of *** TJPU05 in simulated water(SW)with sole or mixed nitrogen sources and in actual wastewater(AW)with high concentration of salt and nitrogen was *** results showed that 86.12%of NH_(4)^(+)-N,95.68%of NO_(3)^(-)-N,100%of NO_(2)^(-)-N and 84.57%of total nitrogen(TN)could be removed from SW with sole nitrogen sources within 24 h at the *** TJPU05 could maximally remove 84.06%of NH_(4)^(+)-N,92.33%of NO_(3)^(-)-N,92.9%of NO_(2)^(-)-N and 77.73%of TN from SW with mixed nitrogen source when the salinity was above 8%.The application of *** TJPU05 in treating AW with high salt and high ammonia nitrogen led to removal efficiencies of 50.96%,47.28%and 43.19%for NH_(4)^(+)-N,NO_(3)^(-)-N and TN respectively without any ***,the activities of nitrogen removal–related enzymes of the strain were also *** successful detection of high level activities of ammonia oxygenase(AMO),hydroxylamine oxidase(HAO),nitrate reductase(NAR)and nitrite reductase(NIR)enzymes under high salinity condition further proved the HN-AD and salt-tolerance capacity of *** *** results demonstrated that the *** TJPU05 has great potential in treating high-salinity nitrogenous wastewater.

关键词： Salt-tolerant bacteria H.venusta TJPU05 Heterotrophic nitrification and aerobic denitrification high-salinity wastewater

Efficient removal of Cr(Ⅲ)-carboxyl complex from neutral and high-salinity wastewater by nitrogen doped biomass-based composites

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Chinese Chemical Letters 2023年第1期34卷 397-402页

作者： Li Song Shichao Jing Yixing Qiu Fuqiang Liu Aimin Li State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Heavy metals usually exist stably as the species of organic complexes in high-salinity ***,their effective removal is challenging,especially when the initial p H is ***,a novel nitrogen doped biomass-based composite(N-CMCS)was synthesized to remove the complexed heavy metal of Cr(Ⅲ)-*** maximum adsorption capacity of Cr(Ⅲ)-Citrate(Cr-Cit)by N-CMCS under neutral p H(7.0)and high-salinity(200 mmol/L NaCl)condition was up to 2.50 mmol/*** the removal performance remained stable after 6 times of *** with species and characterizations analysis,electrostatic attraction and hydrogen bonding were the main mechanisms for N-CMCS to remove Cr(Ⅲ)-carboxyl *** adsorption indicated N-CMCS column could treat about 1300BV simulated wastewater and 350 BV actual wastewater with the concentration of effluent lower than1.0 mg/***,N-CMCS could remove a variety of complexed heavy metal ions under neutral p H,indicating the great potential in practical application.

关键词： Biomass-based Nitrogen doping Adsorption Complexed heavy metals high-salinity wastewater

Selecting Suitable Heat Source in Refinery for Multi-effect Distillation Based on Grey System Theory

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China Petroleum Processing & Petrochemical Technology 2013年第1期15卷 66-72页

作者： Xue Jianliang Zhao Dongfeng Li Shi Liu Wei Shen Chanchan Chen Lu College of Chemical Engineering China University of Petroleum (East China)

For dealing with high-salinity wastewater in the refinery, the high cost of driving heat source is the disadvantage of multi-effect distillation (MED) so it is of great importance to evaluate the performance of low-temperature heat source for conducting MED and select the optimal temperature for it. Both the MED and the low-temperature heat sources studied in this paper were from a typical refinery located in northwestern China. Besides, a new methodology to evaluate heat sources as the optimal candidate was proposed for MED based on the grey system theory. Five process units, which included 18 fluids of the refinery, were named as the evaluation projects. Three factors, which included safety effects, total costs and characteristics of low-temperature heat sources were determined as the evaluation indexes, the values of which were established through the analyses. The results obtained through the grey correlation analyses have revealed that the grey correlation degrees of these units were 0.661(AVDU), 0.732 (#1 FCCU), 0.618 (#2 FCCU), 0.535 (#1 DCU), and 0.572 (#2 DCU), respectively. Thus, the optimal heat source was provided from #1 FCCU. Through further analyses of the fluids from #1 FCCU, the grey correlation degrees of the fluids were 0.597 (oil and gas at top of tower), 0.714 (recycle oil and gas), and 0.512 (diesel), respectively. Thus, the optimal heat source was the oil and gas recycle stream.

关键词： multi-effect distillation grey system theory heat recovery high-salinity wastewater refinery