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Search Results: 1 - 10 of 2217 matches for " sewage sludge "
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Polychlorinated Biphenyls Contamination of Sludge in India  [PDF]
Khageshwar Singh Patel, Shobhana Ramteke, Bharat Lal Sahu, Yogita Nayak, Saroj Sharma, Chin-Chang Hung
American Journal of Analytical Chemistry (AJAC) , 2015, DOI: 10.4236/ajac.2015.611082
Abstract: Polychlorinated Biphenyls (PCBs) exist in all compartments of the ecosystem due to wide industrial applications and production during burning processes. The PCBs congeners were quantified in the industrial, municipal and agricultural wastes of the most industrialized area of the country, Raipur city, India. The concentration of ΣPCBs in the sludge, sewage and agriculture wastes (n = 4) was ranged from 497 - 800 μg/kg with mean value of 634 ± 146 μg/kg. The PCBs congeners detected in the waste materials were ranged from 56 - 85 with mean value of 75 ± 13. The highest number of congeners was quantified in the sludge materials due to the existence of the heavy PCBs. The PCBs congeners were found to decrease vertically due to the adsorption by the geo-media. The distribution, sources and toxicities of PCBs congeners in the waste materials are discussed.
Effect of Alkali Treatment on Heavy Metals Adsorption Capacity of Sewage Sludge  [PDF]
Jianlong Hu, Xiaosong Yang, Linan Shao, Xuwen He, Kunkuo Men
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.32006

Sewage sludge is the promising raw material for biosorbent preparation. In this work, we evaluated the heavy metals adsorption characteristics of alkali treated sewage sludge (ATSS) by equilibrium studies. The adsorption isotherms were fitted with Langmuir and Freundlich models. Comparing with untreated sewage sludge, the total adsorption capacity (qm) of ATSS (prepared with 0.125 mol/L NaOH) for Cd, Pb, Ni, increased by 0.51, 0.70 and 0.32 mmol/g, respectively. When the NaOH concentration for ATSS preparation increased from 0.125 mol/L to 0.25 mol/L, the qm of ATSS for Pb decreased from 1.05 mmol/g to 0.84 mmol/g. However, when the NaOH concentration increased from 0.25 mol/L to 7.5 mol/L, it showed increasing trend. According to the IR spectra data, the adsorption effect of biosorbent for heavy metals was mainly due to the complexation of -N-H groups and -COOH groups.

Contamination of Environment with Polycyclic Aromatic Hydrocarbons in India  [PDF]
Khageshwar Singh Patel, Shobhana Ramteke, Yogita Naik, Bharat Lal Sahu, Saroj Sharma, Jutta Lintelmann, Matuschek Georg
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.611111
Abstract: Environment in India is contaminated with polycyclic aromatic hydrocarbons (PAHs) due to occurring of large anthropogenic activities i.e. fuel combustion, mineral roasting and biomass burning. Hence, contamination of 13 toxic PAHs: phenanthrene, anthracene, fluoranthene, pyrene, benz (a) anthracene, ben-zo (b) fluoranthene, benzo (k) fluoranthene, benzo (a) pyrene, benzo (ghi) perylene, dibenz (ah) anthracene, indeno1,2,3-(cd) pyrene, coronene and coronene in the environment (i.e. ambient particulate matter, road dust, sludge and sewage) of the most industrialized area: Raipur city, India is described. The ΣPAH13 concentration in the 16 environment materials was ranged from 7980 - 1,051,300 μg/kg with mean value of 172,613 ± 154,726 μg/kg. The concentration variations, toxicities and sources of the PAHs in various environmental compartments are discussed.
Combustion Characteristics of Sewage Sludge and Algae  [PDF]
Yaman Kumar Sahu, Pravin Kumar Sahu, Suryakant Chakradhari, Khageshwar Singh Patel
Natural Resources (NR) , 2016, DOI: 10.4236/nr.2016.74019
Abstract: Sewage sludge is a good source of energetically desirable compounds and green algae in developing country like India. In this work, the combustion characteristics of sewage sludge and green algae are described. The calorific value (CV) of dried sewage sludge (n = 7) and green algae (n = 11) was ranged from 1800 to 6250 and 3700 to 6280 kcal/kg with mean value of 3999 ± 1347 and 4428 ± 547 kcal/kg, respectively. The effect of proximate variables and water quality parameters in the CV of sludge and algae are discussed.
Evaluation of Sludge Management in Sewage Treatment Plant in Hamadan Province
M. Farzadkia,H. Taher khani
Journal of Mazandaran University of Medical Sciences , 2005,
Abstract: Background and purpose : Currently, there is only one sewage treatment plant in Sercan City in Hamadan province. Extended aeration activated sludge is the main process of the plant and untreated effluent and disposal sludge are used for agricultural activities. The main objective of this research is to evaluate the stabilization degree and reuse potential of disposal sludge from the plant.Materials and methods : This study was undertaken over a 12 months period from March 2001 to March 2002. In this project some indexes of sludge stabilization and reuse including VS/TS ratio, pH, SOUR, floatation, color, odor, coliform and fecal coliform were determined.Results : The annual average ratio of VS/TS and SOUR in disposal sludge from this plant were 0.73 and 3.37 mg02/gr.vs.h, respectively. The average pH was about 7. The disposal sludge was septic and had dark brown color and floated after a short time. Also the annual average of fecal coliform density in disposal sludge was 8.97 ′ 107 MPN/g.ds.Conclusion : The disposal sludge was raw and destabilized. The microbial quality of disposal sludge was lower than the class B of USEPA regulation. Therefore, this sludge can not be discharged to environment or reused.
Lodo de esgoto como fonte de macronutrientes para a cultura do sorgo granífero
Oliveira, F.C.;Marques, M.O.;Bellingieri, P.A.;Perecin, D.;
Scientia Agricola , 1995, DOI: 10.1590/S0103-90161995000200026
Abstract: the effectiveness of sewage sludge as nutrient source was studied under greenhouse conditions using a typic haplorthox/le soil and sorghum as a plant test the levels of sewage sludge corresponded to applications of 0, 5, 10 and 20 tha-1. the parameters evaluated were sorghum dry matter, nutrient uptake and soil fertility. the results showed that the sewage sludge supplies n, p, ca, mg and s to plants. k addition to the sewage sludge is necessary to supply the need of the sorghum plant.
Vermicomposting as a process to stabilize organic waste and sewage sludge as an apllication for soil
águila Juárez, Pedro Del;Lugo de la Fuente, Jorge;Vaca Paulín, Rocío;
Tropical and subtropical agroecosystems , 2011,
Abstract: the issue of organic waste generation is a constant nowadays; recycling and reduction are expensive physical and chemical processes, so the use of vermicomposting techniques reduces production costs and decontaminates the environment. earthworms decompose organic matter and generate a product called vermicompost. vermicompost is obtained from a wide variety of organic waste including residual sludge; when sewage sludge is managed with vermicomposting techniques, the resulting product supplies nutriments, more stable organic matter and works as a soil conditioner. the present bibliographic review underscores its importance via the use of diverse sorts of organic waste to reincorpórate them into the environment. the parameters considered to produce vermicompost are: ph, temperature, moisture, total solid contents, nitrogen, carbon, c/n ratio and humic acids. the importance of this text is to be found in the need to use vermicompost amendments from the use of sewage sludge to be transformed into fertilizer and be utilized in the growth of plants, thus turning it into an alternative in agricultural soils and a solution for its final end. separately, earthworms take part as agents that bio-accumulate heavy metals and reduce the levels of toxicity in the environments; thereby these organisms, in addition to produce vermicompost, are considered an agent that bio-accumulates heavy metals from the environment.
Crescimento inicial de mudas de Acacia mangium cultivadas em mantas de fibra de coco contendo substrato de lodo de esgoto
Duarte, R?mulo Fredson;Sampaio, Regynaldo Arruda;Brand?o Junior, Delacyr da Silva;Silva, Humberto Pereira da;Parreiras, Nathália de Souza;Neves, José Maria Gomes;
Revista árvore , 2011, DOI: 10.1590/S0100-67622011000100008
Abstract: the objective of this work was to study the initial growth of acacia mangium in coconut fiber "blanket" with a substrate of sewage sludge. the experimental design was of a randomized block with 13 treatments, three repetitions, in a factorial project (6 x 2 + 1), with 6 ratio of coconut fiber and aggregating residue, combined with presence and absence of sewage sludge, and treatment control (subsoil land). the speed emergency index (ive), percentage of emergency (em) and plant height at the 40 and 60 days after emergency was evaluate. no interaction was observed between the type of substrate used and the different ratio of coconut fiber in the "blanket". the presence of sewage sludge in the substrate did not influence the ive and em, however it was verified that the substrate without sewer silt provided greater growth in plant height. the use of "blankets" with 50 and 100% coconut fiber provided greater growth of the a. mangium grow in field conditions.
Biodisponibilidade de Cd em Latossolo Acrescido de Lodo de Esgoto.
Renata de Carvalho Jimenez Alamino,Helena Polivanov,Tácio Mauro P. de Campos,Vitor Hugo Gomes da Silva
Anuário do Instituto de Geociências , 2007,
Abstract: This study was carried out to obtain the bioavailability of cadmium in a latosol increased of a singledose of sewage sludge. Representative samples of Bw horizon of a latosol, from Duque de Caxias city – RJ,and sewage sludge from ETE Ilha do Governador, in Rio de Janeiro city were collected. These materials werecharacterized due to its chemical, physical and mineralogical characteristics. Latter on, the samples were mixedtogether and bioavailability tests were accomplished. The results show that cadmium became bioavailablein the solution in the first hour of assay. After this interval the concentration of the available metal in solutionit diminished, occurring stabilization in the subsequent hours of collection.
International Journal of Engineering Science and Technology , 2013,
Abstract: A large quantity of sludge rich in nutrients and microorganisms is generated every year from water and wastewater treatment plants, the final destination of which affects the environment. Generally, dewatered sludge is disposed of by spreading on the land or by land filling. However, space limitations on existing landfill sites and problems of waste stabilization have prompted investigation into alternative reuse techniques and disposal routes for sludge. A more reasonable approach is to view the sludge as a resource that can be recycled or reused. Many researchers have exploited the reuse of lime sludge from water treatment plant and sewage sludge ash as an inexpensive source of soil stabilizer in sub grade stabilization and soft cohesive soil respectively. Sewage sludge pellets (SSP) has replaced sand in concrete manufacturing for pavements. The use of SSP as substituting material in raw mix formulation in Portland cement manufacturing has been studied by many researchers. Experimental results showed the feasibility of the partial replacement (15 and 30%) of cement by sewage sludge ash (SSA) in mortars. This paper highlights the potential of dried sludge, sludge pellets and sludge ash in various building materials for construction.
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