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Wu Jian,Wang Shihe
Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 191-195
Combining membrane bioreactor and A2/O crafts, MB(A2/O) craft is developed to promote the technology with high efficiency for phosphorus and nitrogen removal. This report studies the performances of aerobic and anaerobic phosphorus uptake and the characters of microorganism of municipal sewage treated by MB(A2/O) craft, and analyzes its mechanism as well. The results indicate that the phosphate accumulating organisms take up 20%~40% of active sludge. There are a great deal of DPB which make use of NOx-N as electron acceptor to have denitrifying phosphorus removal and take up approximately 35. 66%~67. 83% of PAOs. The average rate of aerobic phosphorus uptake is 2. 30mgP·gMLSS-1·h-1, and the highest rate is 5. 44mgP·gMLSS-1·h-1. The average velocity of anaerobic phosphorus uptake is 1. 56 mgP·gMLSS-1·h-1, and the biggest rate is 1. 94 mgP·gMLSS-1·h-1.
Keywords： aerobic phosphorus uptake denitrifying phosphorus removal phosphate accumulating organisms(PAOs) electron acceptor
Green Integrated Process for the Production of Compound Phosphate Fertilizer
Feng Yisheng
Strategic Study of CAE 1999, Volume 1, Issue 1, Pages 58-62
The waste residue discharged from the production of compound phosphate fertilizer occupies large area of land and pollutes surrounding environment, which causes environmental problems hard to control. However, environmental pollution can be minimized and effective utilization of sulphur resources is achieved by employing phosphorus gypsum to make sulphuric acid and cement. In doing so, the economic, social and environmental benefits can be gained simultaneously and sustainable development of the phosphorus compound fertilizer industry is greatly facilitated.
Keywords： compound phosphate fertilizer phosphoretted gypsum sulfuric acid cement
Hui Wang, Yubo Wang, Guoqing Zhang, Ze Zhao, Feng Ju
Engineering 2023, Volume 29, Issue 10, Pages 168-178 doi: 10.1016/j.eng.2022.10.016
Tetrasphaera have been recently identified based on the 16S ribosomal RNA (rRNA) gene as among the most abundant polyphosphate-accumulating organisms (PAOs) in global full-scale wastewater treatment plants (WWTPs) with enhanced biological phosphorus removal (EBPR). However, it is unclear how Tetrasphaera PAOs are selectively enriched in the context of the EBPR microbiome. In this study, an EBPR microbiome enriched with Tetrasphaera (accounting for 40% of 16S sequences on day 113) was built using a top-down design approach featuring multicarbon sources and a low dosage of allylthiourea. The microbiome showed enhanced nutrient removal (phosphorus removal ∼85% and nitrogen removal ∼80%) and increased phosphorus recovery (up to 23.2 times) compared with the seeding activated sludge from a local full-scale WWTP. The supply of 1 mg·L−1 allylthiourea promoted the coselection of Tetrasphaera PAOs and Microlunatus PAOs and sharply reduced the relative abundance of both ammonia oxidizer Nitrosomonas and putative competitors Brevundimonas and Paracoccus, facilitating the establishment of the EBPR microbiome. Based on 16S rRNA gene analysis, a putative novel PAO species, EBPR-ASV0001, was identified with Tetrasphaera japonica as its closest relative. This study provides new knowledge on the establishment of a Tetrasphaera-enriched microbiome facilitated by allylthiourea, which can be further exploited to guide future process upgrading and optimization to achieve and/or enhance simultaneous biological phosphorus and nitrogen removal from high-strength wastewater.
Keywords： Enhanced biological phosphorus removal (EBPR) Polyphosphate-accumulating organisms (PAOs) Tetrasphaera Microbiome Phosphorus recovery
Treatment of Sludges Formed in Production of Phosphorus
Huang Xiaofeng,Ma Zhongming,Ning Ping,Ma Xingliang,Gao Huimin
Strategic Study of CAE 2005, Volume 7, Issue 11, Pages 91-93
Because the sludge treating technology is at low level and the phosphorus sludge had polluted the environment seriously, the advantages and shortcomings about some kinds of processes to treat phosphorus sludge are compared in this article. It has put forward a clean and economical process to produce sodium hypophosphite product from phosphorus sludge.
Keywords： phosphorus sludge treating technology sodium hypophosphite
A New Method for Strengthening Wrought Superalloys: micro-alloying with Phosphorus and Boron
Hu Zhuangqi,Sun Wenru,Song Hongwei
Strategic Study of CAE 2005, Volume 7, Issue 3, Pages 17-26
The strengthening effect of phosphorus and boron on wrought superalloys is reviewed and discussed. The addition of phosphorus and boron can prolong the rupture life of some wrought superalloys over 3 times, and lowers the constant creep rate by an order of magnitude. By micro-alloying with phosphorus and boron, alloys with extended rupture life are developed, the service temperature of IN718 alloy is enhanced, and the alloys which can be used for a long time at 700℃ with higher combined properties can be developed.
Keywords： wrought superalloy phosphorus boron micro-alloying
A Floating Island Treatment System for the Removal of Phosphorus from Surface Waters Article
Mark T. Brown,Treavor Boyer,R.J. Sindelar,Sam Arden,Amar Persaud,Sherry Brandt-Williams
Engineering 2018, Volume 4, Issue 5, Pages 597-609 doi: 10.1016/j.eng.2018.08.002
The goal of this project was to design, build, and test a pilot-scale floating modular treatment system for total phosphorus (TP) removal from nutrient-impaired lakes in central Florida, USA. The treatment system consisted of biological and physical–chemical treatment modules. First, investigations of prospective biological and physical–chemical treatment processes in mesocosms and in bench-scale experiments were conducted. Thirteen different mesocosms were constructed with a variety of substrates and combinations of macrophytes and tested for TP and orthophosphate (\(\rm PO_4^{3-}\)
Keywords： Phosphorus removal Lake ecosystem Floating island treatment
The research on fast annealing microstructure evolution of low silicon TRIP steel with phosphorus
Chen Peng,Shen Chunyu,Xu Yunbo and Wang Guodong
Strategic Study of CAE 2014, Volume 16, Issue 1, Pages 48-53
The low silicon transformation induced plasticity（TRIP）steel with phosphorus addition at every stage of fast annealing process has been studied by heat treatment experiment at lab. The effects of annealing temperatures on microstructure constitute at every stage are mainly studied. The addition of low price element phosphorus can reduce silicon content， improve surface quality，solve galvanizing problem and reduce costs. Results show that the ferrite content decrease，and the mixture of bainite and martensite content increase at final microstructure. By X-ray diffraction（XRD）analysis，the retained austenite content increases from 12.7 % at 750 ℃ annealing to 14.9 % at 790 ℃.
Keywords： automobile steel TRIP steel low silicon fast annealing microstructure evolution
Analysis on the Amount and Utilization of Manure in Livestock and Poultry Breeding in China
Shuxia Wu, Hongbin Liu, Hongkun Huang, Qiuliang Lei, Hongyuan Wang, Limei Zhai, Shen Liu, Ying Zhang, Yu Hu
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 103-111 doi: 10.15302/J-SSCAE-2018.05.016
Unreasonable discharge of manure from livestock and poultry breeding is a main source of agricultural non-point source pollution in China, but the manure is also a potential resource. How to achieve the best resource utilization of livestock manure and reduce environmental pollution has become a major problem that must be solved in the sustainable development of China’s breeding industry. In this paper, the pollutant discharge coefficient method is used to calculate the amount of manure produced by livestock and poultry breeding in China, and the current situation and problems of its resource utilization are analyzed.
Applied study on pyrolysis of bisphenol A diphosphate flame-retarded ABS
Xu Xiaonan,Lu Lingang,Chen Nan,Yin Quanming,Wang Dawei
Strategic Study of CAE 2010, Volume 12, Issue 2, Pages 62-69
Physical performances, the limiting oxygen index (LOI), vertical combustion performances (UL94), flame retardant performances, smoke release of bisphenol A diphosphate (BDP), BDP/APP and BDP/SiO2 added in ABS are studied. The experimental results showed that BDP added in phenolic resin (NP) can increase char quality. As BDP/NP= 20 %/5 % was added in ABS, the maximum reduction parameter of physical performances is impact strength, which was reduced by 12.00 %, and the ABS resins passed the UL94V-0 test, LOI reached 29.50 %. CONE data showed that its average heat rate (av-HRR) and peak heat rate (pk-HRR) reduced by 46.40 %and 40.45 %, ignition time(TTI ) increased 30 s, flame growth index(FGI) reduced by 50.75 %, average smoke extinction area(SEA) increased by 31.30 % in 6 minute, char ratio was 7.19 % at 600 ℃. When the BDP/NP /APP=20 %/5 %/5 % was added in ABS, ABS resins passed the UL94V-0 test, LOI reached 31.10 %, its reduction range of impact strength was 36.00 %, av-HRR and pk-HRR reduced by 50.11 %and 55.58 %, TTI increased 35 s, FGI reduced by 64.32 %, av-SEA increased by 11.14 % in 6 minute, char ratio was11.15 % at 600 ℃. Adding BDP//NP / SiO2 =20 %/5 %/7 %BDP into ABS resin, its impact strength increased by 20.00 %, the ABS resins also passed the UL94V-0 test, LOI reached 31.20 %, av-HRR and pk-HRR reduced by 49.45 % and 58.09 %, TTI increased 45 s, FGI reduced by 68.34 %, av-SEA increased by 13.00 % in 6 minute, char ratio was 16.37 % at 600 ℃. ABS resin added BDP/NP (20 %/5 %) and nanometer SiO2(7 %) has the best flame retarded and suppression smoke effect and the smallest influence on physical performances.
Wu Haisuo,Xu Ming,Zhang Minjian,Liu Weijing,Yu Xuemin,Wu Wei
Strategic Study of CAE 2010, Volume 12, Issue 6, Pages 54-59
Pilot-scale & demonstration project study of the treatment of printing and dyeing wastewater was carried out using the combined process of anaerobic (hydrolysis)-aerobic-advanced treatment. The result of Pilot-scale study indicates:the total removal efficiency of the COD, color, NH3-N, TN, TP of the system were 93.2 %, 93.9 %, 90.2 %, 70.8 %, 96.3 % respectively, anaerobic (hydrolysis) is vital to COD & color degradation, the removal efficiency of the COD & color were 48.1 %, 75.7 %, respectively, The A/O(PACT)is vital to NH3-N & TN degradation, the coagulation treatment could effectively degrade the TP. The effluent of Pilot-scale & demonstration project could satisfy 《Discharge Standard of Main Water Pollutants for Municipal Wastewater Treatment Plant & Key Industries of Taihu Area》(DB32/1072-2007).
Keywords： Taihu Area printing and dyeing wastewater nitrogen and phosphorus removal demonstration project
Plant Traits for Phytoremediation in the Tropics Article
Xiangting Cleo Chen, Liling Huang, Tze Hsien Agnes Chang, Bee Lian Ong, Say Leong Ong, Jiangyong Hu
Engineering 2019, Volume 5, Issue 5, Pages 841-848 doi: 10.1016/j.eng.2019.07.019
Water is a limited and valuable resource. Singapore has four national sources of water supply, one of which is natural precipitation. Pollutants collected in stormwater runoff are deposited into drainage systems and reservoirs. Major nutrient pollutants found in local stormwater runoff include nitrate and phosphate, which may cause eutrophication. Bioretention systems are efficient in removing these pollutants in the presence of plants. This paper discusses plant traits that can enhance the phytoremediation of nutrient pollutants in stormwater runoff for application in bioretention systems. The plant species studied showed variations in chlorophyll florescence, leaf greenness, biomass production, and nitrate and phosphate removal. In general, dry biomass was moderately correlated to nitrate and phosphate removal (r = 0.339–0.501). Root, leaf, and total dry biomass of the native tree species showed a moderate to strong correlation with nitrate removal (r = 0.811, 0.657, and 0.727, respectively). Leaf dry biomass of fastgrowing plants also showed a moderate to strong relationship with the removal of both pollutants (r = 0.707 and 0.609, respectively). Root dry biomass of slow-growing plants showed a strong relationship with phosphate removal (r = 0.707), but the correlation was weaker for nitrate removal (r = 0.557). These results are valuable for choosing plants for application in bioretention systems.
Keywords： Nitrogen Phosphorus Plant traits Bioretention system Stormwater Tropical plant Nutrient pollutant Native plants
Removal of P4, PH3 and H2S from Yellow Phosphoric Tail Gas by a Catalytic Oxidation Process
Ning Ping,Hans-Jörg Bart,Wang Xueqian,Ma Liping,Chen Liang
Strategic Study of CAE 2005, Volume 7, Issue 6, Pages 27-35
Yellow phosphorus tail gas is a resource to produce bulk chemicals, such as formate, oxalate, methanol and so on, after pretreatment and purification. In this study, catalytic oxidation of phosphorus and hydrogen sulfide in yellow phosphorus tail gas was investigated with activated carbon and a home-made catalyst KU2. Phosphorus and hydrogen sulfide adsorption characteristics on the catalysts were studied in a fixed-bed system at different temperatures between 20 and 140 ℃ under atmospheric pressure. Both KU2 and activated carbon proved to be effective catalysts in the catalytic oxidation process (COP) for H2S and PH3 removal. Purification efficiency increases with the increase of temperature and oxygen concentration in yellow phosphorus tail gases. Under optimized operation conditions the product gas with a content of hydrogen sulfide ＜5 mg/m3, total phosphorus＜ 5 mg/m3 was obtained by using the COP process. Spent catalysts could be restored to the original activity after several regenerations. A mathematical model was developed to simulate the experimental results and the mass transfer coefficient for the experiment was evaluated. Good agreement of the experimental breakthrough curves with the model predictions was observed.
Title Author Date Type Operation
The Performances of Aerobic and Anaerobic Phosphorus Uptak e and theCharacters of Microorganism in MB（A2/O）Craft
Wu Jian,Wang Shihe
Journal Article
Green Integrated Process for the Production of Compound Phosphate Fertilizer
Feng Yisheng
Journal Article
Temporal Dynamics and Performance Association of the Tetrasphaera-Enriched Microbiome for Enhanced Biological Phosphorus Removal
Hui Wang, Yubo Wang, Guoqing Zhang, Ze Zhao, Feng Ju
Journal Article
Treatment of Sludges Formed in Production of Phosphorus
Huang Xiaofeng,Ma Zhongming,Ning Ping,Ma Xingliang,Gao Huimin
Journal Article
A New Method for Strengthening Wrought Superalloys: micro-alloying with Phosphorus and Boron
Hu Zhuangqi,Sun Wenru,Song Hongwei
Journal Article
A Floating Island Treatment System for the Removal of Phosphorus from Surface Waters
Mark T. Brown,Treavor Boyer,R.J. Sindelar,Sam Arden,Amar Persaud,Sherry Brandt-Williams
Journal Article
The research on fast annealing microstructure evolution of low silicon TRIP steel with phosphorus
Chen Peng,Shen Chunyu,Xu Yunbo and Wang Guodong
Journal Article
Analysis on the Amount and Utilization of Manure in Livestock and Poultry Breeding in China
Shuxia Wu, Hongbin Liu, Hongkun Huang, Qiuliang Lei, Hongyuan Wang, Limei Zhai, Shen Liu, Ying Zhang, Yu Hu
Journal Article
Applied study on pyrolysis of bisphenol A diphosphate flame-retarded ABS
Xu Xiaonan,Lu Lingang,Chen Nan,Yin Quanming,Wang Dawei
Journal Article
Research on standard upgrading technologies of urban wastewater treatment plants for pollutions dominated by printing and dyeing wastewater in Taihu Lake Basin
Wu Haisuo,Xu Ming,Zhang Minjian,Liu Weijing,Yu Xuemin,Wu Wei
Journal Article
Plant Traits for Phytoremediation in the Tropics
Xiangting Cleo Chen, Liling Huang, Tze Hsien Agnes Chang, Bee Lian Ong, Say Leong Ong, Jiangyong Hu
Journal Article
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