Advanced treatment of dye wastewater using a novel integrative Fenton-like/MnO2-filled upward flow biological filter bed system equipped with modified ceramsite

2021 ◽  
Vol 194 ◽  
pp. 110641
Author(s):  
Wei Qian ◽  
Hui Huang ◽  
Zenghui Diao ◽  
Huankai Li ◽  
Hui Liu ◽  
...  
2015 ◽  
Vol 273 ◽  
pp. 166-172 ◽  
Author(s):  
Wei Qian ◽  
Jialin Zhang ◽  
Ya Xiong ◽  
Xin Chen ◽  
Shuanghong Tian ◽  
...  

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28448-28453
Author(s):  
Wei Qian ◽  
Ya Xiong ◽  
Shuanghong Tian ◽  
Lianpeng Sun ◽  
Xin Chen ◽  
...  

An upward flow BFB with a high decomposition efficiency of H2O2 is constructed. This BFB removes the detrimental effect of H2O2 and turns it into DO to boost aerobic metabolism. A concentration of 120 mg L−1 H2O2 in feed wastewater increases COD removal efficiency by 39%.


2011 ◽  
Vol 414 ◽  
pp. 203-213 ◽  
Author(s):  
Xing Run Wang ◽  
Xiang Hua Yan ◽  
Qi Wang

It studied the geological properties and contamination characteristics of soil from contaminated sites of typical chromate plants in western plateau of China. The results indicated that in the shallow part of 0-4m, it was mainly loess-like soil and in the depth of 4-18m, it was mainly gravels and pebbles. The soil had better permeability and ex-situ washing treatment is recommended. The soil was severely contaminated and the concentration of chrome (Ⅵ) was as high as 16,000mg/kg. Based on the analysis, it developed a two-stage demonstration project of countercurrent ex-situ washing plus chemical stabilization with daily capacity of 20m3 soil and a demonstration project of chemical reduction and precipitation plus advanced treatment of filter bed with daily capacity of 200m3 wastewater. After treatment, the concentration of chrome (Ⅵ) in soil was less than 100mg/kg and that in water was reduced to below 0.05mg/L from 1,000mg/L, which can meet the requirements of third-grade groundwater quality standard.


2011 ◽  
Vol 80-81 ◽  
pp. 298-301
Author(s):  
Shi Wei Cao ◽  
Wei Chen ◽  
Zhao Qian Jing

Fly ash Ceramsite, Artificial Biofilter Bed, Dry Umbrella Bamboo, Phosphorus Removal Abstract: High calcium fly ash ceramsite had tremendous surface area and porosity, the unit weight of fly ash adsorption column adsorption capacity of ceramsite was 0.032mg•g-1, which was higher than normal calcium fly ash ceramsite adsorption capacity. The fix adsorption column tests showed that the adsorption capacity got stable when the contact time was 3 hours and the saturation adsorption was got at the ninth hour. The result of subsequent tests showed that the phosphorus resolve would not occur if the adsorption condition doesn’t change. The pilot test with actual wastewater was done and the results showed that the PO43- concentrations of effluent were less than 0.2mg•L-1 and the removal rate reached 90%, dry umbrella bamboo was the most suitable aquatic plant. The artificial biological filter process monitoring showed that the phosphorus of the sewage was mainly removed in the front of artificial biological filter bed.


The worldwide population is developing and along these lines, the world may event incredible freshwater shortage. Our water assets are lacking and, thus, water management and reusing techniques are the main choices for receiving freshwater later on decades. Accordingly, there is an incredible requirement for the advancement of proper, reasonable and quick wastewater. The common plan of this investigation is based on assessment and comparison, of the chance of apply advanced treatment techniques (Aeration process and Fenton oxidation process) for the exclusion of residuals organic pollutant present in Dye wastewater. The various procedures, which influence the compound oxidation, for colors in their fluid arrangements are considered by utilizing Aeration and Fenton's responses. These Processes are Aeration and Fenton Oxidation Process- (Hydrogen peroxide dose). Finally, EC, COD, BOD, Turbidity, TDS, TSS, and Phosphate, when the oxidation procedure is determined to guarantee the flawless obliteration of natural colors during their expulsion from wastewater. The Compared optimum conditions were 6ml/l of Fenton (H2O2) demonstrate that Fenton's oxidation procedure effectively accomplished excellent evacuation capability.


2016 ◽  
Vol 95 (7) ◽  
pp. 1245-1252 ◽  
Author(s):  
Xuefeng Xiao ◽  
Yongjun Sun ◽  
Wenquan Sun ◽  
Hao Shen ◽  
Huaili Zheng ◽  
...  

Irriga ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 315-335
Author(s):  
Tamires Lima Da Silva ◽  
Rodrigo Máximo Sánchez-Román ◽  
João Gabriel Thomaz Queluz ◽  
Valdemiro Simão João Pitoro

SISTEMA SIMPLIFICADO DE TRATAMENTO DE ÁGUA RESIDUÁRIA DOMÉSTICA PARA IRRIGAÇÃO DE HORTALIÇAS     TAMIRES LIMA DA SILVA1; RODRIGO MÁXIMO SÁNCHEZ-ROMÁN2 JOÃO GABRIEL THOMAZ QUELUZ3 VALDEMIRO SIMÃO JOÃO PITORO4   1Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista (UNESP), Avenida Universitária, nº 3780 – CEP 18610-034, Altos do Paraíso, Botucatu, SP, Brasil, E-mail: [email protected]; 2Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista (UNESP), Avenida Universitária, nº 3780 – CEP 18610-034, Altos do Paraíso, Botucatu, SP, Brasil, E-mail: [email protected]. 3Instituto de Geociências e Ciências Extas, Universidade Estadual Paulista, Avenida 24 A,1515, CEP: 13506- 900, Rio Claro, SP, Brasil, E-mail: [email protected]. 4Departamento de Engenharia Rural, Faculdade de Ciências Agrárias, Universidade de Lúrio, Campus de Unango, EN 733, Km 42, Sanga, Niassa, Moçambique, E-mail: [email protected]     1 RESUMO   Na produção de hortaliças a necessidade de irrigação pode ser constante, e a água utilizada deve apresentar boa qualidade. Após tratamento adequado, a água residuária doméstica (ARD) pode ser uma opção viável e segura de água para reúso. Este trabalho avaliou a eficiência de um sistema simplificado de tratamento de ARD composto por leito biológico filtrante e reator de desinfecção solar de concreto para fins de reúso na irrigação de hortaliças. O sistema foi instalado na Faculdade de Ciências Agronômicas-FCA, Unesp, Botucatu-SP. No reator foram testadas lâminas de 10, 15 e 20 cm. A desinfecção solar no reator gerou um efluente tratado com qualidade em acordo com a diretriz da Organização Mundial de Saúde para irrigação irrestrita (coliformes fecais ≤ 1.000 NMP 100 mL-1) após quatro horas de exposição. Considerando os parâmetros pH, CE e SDT, a ARD tratada foi classificada como “nenhuma restrição” de uso para irrigação segundo a classificação proposta pela FAO. Com os resultados médios das concentrações de N, P e K na ARD tratada, seu potencial nutricional para produção de hortaliças foi estimado em: 525,6 kg m3 ha-1 ano-1 de N, 175,2 kg m3 ha-1 ano-1 de P e 521,9 kg m3 ha-1 ano-1 de K.   Palavras-chave: reúso agrícola, leito biológico filtrante, desinfecção solar, efluente doméstico.     SILVA, T. L.; SÁNCHEZ-ROMÁN, R. M; QUELUZ, J. G. T; PITORO, V.S.J. SIMPLIFIED DOMESTIC WASTEWATER TREATMENT SYSTEM FOR VEGETABLE CROP IRRIGATION     2 ABSTRACT   In vegetable crop production the need for irrigation can be constant, and the water used must present good quality. After adequate treatment, domestic wastewater (DW) can be a viable and safe option of water for reuse. This work evaluated the efficiency of a simplified DW treatment system composed of a biological filter bed and a solar concrete disinfection reactor for reuse in vegetable crop irrigation. The system was installed at the School of Agronomic Science-FCA, Unesp, Botucatu-SP. In the reactor, depths of 10, 15 and 20 cm were tested. The solar disinfection in the reactor resulted in a treated effluent with quality in accordance with the threshold established by the World Health Organization for unrestricted irrigation (fecal coliforms ≤ 1,000 NMP 100 mL-1) after four hours of solar exposure. Considering pH, EC and TDS parameters, the DW treated can be classified as “none restriction” use for irrigation according to the classification proposed by FAO. With the average results of N, P and K concentrations in the treated DW, its nutritional potential for vegetable crop production was estimated as:  525.6 kg m3 ha-1 year-1 to N, 175.2 kg m3 ha-1 year-1 to P and 521.9 kg m3 ha-1 year-1 to K.   Keywords: agricultural reuse, biological filter bed, solar disinfection, sewage. 


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