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Qi Y.-F.,Shanghai JiaoTong University | He S.-B.,Shanghai JiaoTong University | Wu S.-Q.,Shanghai JiaoTong University | Dai B.-B.,Shandong ATK Environmental Engineering Company Ltd | Hu C.-H.,Zhejiang Shenghua Biok Biology Co.
Desalination and Water Treatment | Year: 2015

System which included micro-electrolysis (ME), up-flow anaerobic sludge bed (UASB), anoxic/oxic (A/O) activated sludge process and biological aerated filter (BAF) were investigated in penicillin G-processing wastewater treatment. The main quality of the wastewater was shown as follows: chemical oxygen demand (CODcr) of 1,4507–1,5280 mg L−1, ammonium nitrogen (NH3–N) of 598–826 mg L−1, suspended solid of 1,850–2,190 mg L−1, and pH of 3.5–5.2. Moreover, penicillin G residue in the wastewater was 130–150 mg L−1. ME was utilized as the pretreatment method, UASB and A/O process were designed for the secondary treatment, and BAF was used as the advanced treatment. The results revealed that biodegradability of the wastewater could be effectively improved by ME, and most of CODcr and NH3–N in the wastewater could be removed by UASB and A/O process, and the residual COD and NH3–N could be removed by BAF. The average COD and NH3–N in final effluent was about 275.3 and 19.8 mg L−1, respectively, and the treated wastewater quality reached the requirement of the national discharge standards (wastewater quality standards for discharging into municipal sewer pipelines, China, COD ≤ 300 mg L−1, NH3–N ≤ 25 mg L−1 in C standard). Especially, about 80% of penicillin G residue in the wastewater could be removed or converted by ME reactor, and the wastewater could be effectively deposed in this system. © 2014 Balaban Desalination Publications. All rights reserved.

Qi Y.,Shanghai JiaoTong University | Dai B.,Shandong ATK Environmental Engineering Company Ltd | He S.,Shanghai JiaoTong University | Wu S.,Shanghai JiaoTong University | And 4 more authors.
Journal of the Taiwan Institute of Chemical Engineers | Year: 2016

In order to solve disposal problems of hazardous solid wastes, oxytetracycline mycelia residue (OMR) and dredged heavy metal-contaminated sediments (DS) from Tai Lake were utilized as raw materials to produce ultra-lightweight ceramsite (ULC). Effects of mass ratios of organic matters/SiO2+Al2O3 (O/SA) and MgO+Fe2O3+CaO/SiO2+Al2O3 (MFC/SA) on characteristics of the ceramsite were investigated to optimize the ULC production process. Our results show that OMR and DS were suitable materials for ULC production, while the optimal mass ratios of O/SA and MFC/SA were 0.180-0.296 and 0.115-0.185, respectively. The addition of MFC lowered down the softening temperature and the viscosity of glass phase in ceramsite, promoting the crystallization in the glass phase. A proper MFC/SA ratio of 0.105-0.165 promoted the glass phase and increased the porosity of ceramsite. Al2O3 and SiO2 played a significant role in the formation process of crystals. However, the varying O/SA ratios only slightly impacted the variation of major crystalline phases and the viscosity of the glass phase. High MFC/SA ratios (≥0.205) decreased the crystallization of quartz, mullite and kyanite, but increased more complex crystalline phases. Additionally, the sintering process immobilized the heavy metals and could be a promising technology to control OMR pollution. © 2016 Taiwan Institute of Chemical Engineers.

Wu S.,Shanghai JiaoTong University | Qi Y.,Shanghai JiaoTong University | Qi Y.,Shandong ATK Environmental Engineering Company Ltd | Fan C.,Shanghai JiaoTong University | And 5 more authors.
Chemical Engineering Journal | Year: 2016

Monensin discharged with the animal wastes and wastewater can cause harmful effect to the environment and human health. In this study, catalytic micro-electrolysis (CME) reactor filled with novel catalytic-ceramic-filler was utilized as pretreatment to improve the anaerobic biological treatment effect for the real monensin wastewater. The CME reactor as a possible pretreatment process had satisfactory effect, with 98.44% of monensin residue and 37.07% of chemical oxygen demand (COD) removals at the optimum hydraulic retention time (HRT) of 3.0 h and dissolved oxygen (DO) of about 1.5 mg L-1. Subsequently, as the secondary biological treatment, the Up-FLOW Anaerobic Sludge Blanket (UASB) reactor treatment effect was greatly improved by the CME pretreatment, with approximately 80% of COD removal at the optimum organic loading rate (OLR) of 3.5 kg m-3 d-1, which had higher methane yield (about 0.33 m3 kg-1 COD-1) and lower volatile fatty acids (VFA) concentration (about 300 mg L-1) than that of the UASB reactor without pretreatment. Finally, an activated sludge (AS) reactor was utilized as the last biological treatment and the coupled CME-UASB-AS system had high COD and chroma removal (about 98% and 95%, respectively), the final effluent (COD and chroma of about 200 mg L-1 and 40, respectively) with no residual monensin met the national discharged standard, which provided a reliable system for the practical monensin production wastewater treatment. © 2016 Elsevier B.V.

Wu S.,Shanghai JiaoTong University | Qi Y.,Shanghai JiaoTong University | Qi Y.,Shandong ATK Environmental Engineering Company Ltd | He S.,Shanghai JiaoTong University | And 5 more authors.
Chemical Engineering Journal | Year: 2015

2,4,6-Trinitrotoluene (TNT) has been widely used in military and civilian blasting all over the world, causing great concern with regard to its toxicity to environment and human health. Our research investigated preparation and application of the catalytic-ceramic-filler in the catalytic micro-electrolysis coupled with a biological aerated filter for TNT manufacturing wastewater treatment. As a possible pretreatment process of TNT manufacturing wastewater, catalytic micro-electrolysis packed with the catalytic-ceramic-filler had higher TNT and chemical oxygen demand removal (98.73% and 65.49%, respectively) than traditional micro-electrolysis at the optimum hydraulic retention time of 4.0h and slight aeration (dissolved oxygen of about 2.0mgL-1). Subsequently, biological aerated filter applied as the secondary biological treatment removed 81.68% of the influent chemical oxygen demand at the optimum hydraulic retention time of 16.0h. Moreover, the coupled catalytic micro-electrolysis and biological aerated filter system could remove chroma values by 95.21%. The residual TNT (1.5-1.6mgL-1), chemical oxygen demand (57.0-84.6mgL-1) and chroma (7.9-17.2) in the effluent met the national discharge standard (GB 14470.1-2002, TNT concentration ≤5.0mgL-1, chemical oxygen demand ≤100mgL-1, chroma ≤50). © 2015 Elsevier B.V..

Wu S.,Shanghai JiaoTong University | Qi Y.,Shanghai JiaoTong University | Qi Y.,Shandong ATK Environmental Engineering Company Ltd | Fan C.,Shanghai JiaoTong University | And 5 more authors.
Chemosphere | Year: 2016

To gain systematic technology for long-chain dicarboxylic acids (LDCA) manufacturing wastewater treatment, catalytic micro-electrolysis (CME) coupling with adsorption-biodegradation sludge (AB) process was studied. Firstly, novel catalytic-ceramic-filler was prepared from scrap iron, clay and copper sulfate solution and packed in the CME reactor. To remove residual n-alkane and LDCA, the CME reactor was utilized for LDCA wastewater pretreatment. The results revealed that about 94% of n-alkane, 98% of LDCA and 84% of chemical oxygen demand (COD) were removed by the aerated CME reactor at the optimum hydraulic retention time (HRT) of 3.0 h. In this process, catalysis from Cu and montmorillonites played an important role in improving the contaminants removal. Secondly, to remove residual COD in the wastewater, AB process was designed for the secondary biological treatment, about 90% of the influent COD could be removed by biosorption, bio-flocculation and biodegradation effects. Finally, the effluent COD (about 150 mg L-1) discharged from the coupled CME-AB system met the requirement of the national discharged standard (COD ≤ 300 mg L-1). All of these results suggest that the coupled CME-AB system is a promising technology due to its high-efficient performance, and has the potential to be applied for the real LDCA wastewater treatment. © 2015 Elsevier Ltd.

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