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https://www.readbyqxmd.com/read/28812178/sludge-quantification-at-water-treatment-plant-and-its-management-scenario
#1
Tarique Ahmad, Kafeel Ahmad, Mehtab Alam
Large volume of sludge is generated at the water treatment plants during the purification of surface water for potable supplies. Handling and disposal of sludge require careful attention from civic bodies, plant operators, and environmentalists. Quantification of the sludge produced at the treatment plants is important to develop suitable management strategies for its economical and environment friendly disposal. Present study deals with the quantification of sludge using empirical relation between turbidity, suspended solids, and coagulant dosing...
August 15, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28811160/high-efficiency-removal-of-lead-from-wastewater-by-biochar-derived-from-anaerobic-digestion-sludge
#2
Shih-Hsin Ho, Yi-di Chen, Zhong-Kai Yang, Dillirani Nagarajan, Jo-Shu Chang, Nan-Qi Ren
The properties of biochar derived from waste activated sludge and anaerobic digestion sludge under pyrolysis temperature varying from 400°C to 800°C were investigated. The heavy metals adsorption efficiency of the sludge-derived biochar was also examined. Among the biochar samples tested, ADSBC600 possessing highly porous structure, special surface chemical behaviors and high thermal stability was found to remove Pb(2+) from aqueous solutions efficiently with an adsorption capacity of 51.20mg/g. The Pb(2+) adsorption kinetics and isotherm for ADSBC600 can be described using the pseudo second-order model and Langmuir isotherm, respectively...
August 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810214/evaluation-of-chemical-thermobaric-and-thermochemical-pre-treatment-on-anaerobic-digestion-of-high-fat-cattle-slaughterhouse-waste
#3
Peter W Harris, Thomas Schmidt, Bernadette K McCabe
This work aimed to enhance the anaerobic digestion of fat-rich dissolved air flotation (DAF) sludge through chemical, thermobaric, and thermochemical pre-treatment methods. Soluble chemical oxygen demand was enhanced from 16.3% in the control to 20.84% (thermobaric), 40.82% (chemical), and 50.7% (thermochemical). Pre-treatment altered volatile fatty acid concentration by -64% (thermobaric), 127% (chemical) and 228% (thermochemical). Early inhibition was reduced by 20% in the thermochemical group, and 100% in the thermobaric group...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28809953/monitoring-health-and-reproductive-status-of-olms-proteus-anguinus-by-ultrasound
#4
Susanne Holtze, Maja Lukač, Ivan Cizelj, Frank Mutschmann, Claudia Anita Szentiks, Dušan Jelić, Robert Hermes, Frank Göritz, Stanton Braude, Thomas Bernd Hildebrandt
The olm (Proteus anguinus) is a troglomorphic, neotenous amphibian with extraordinary life expectancy and unique adaptations that deserve further investigation. A low reproductive rate and habitat decline render it threatened by extinction. Establishing captive populations for maintenance and artificial breeding may one day become crucial to the species. Longitudinal, in-vivo assessment of inner organs is invaluable to our understanding of reproductive physiology, health, and behavior. Using ultrasound, we measured heart rate and assessed health and reproductive status of 13 captive olms at Zagreb Zoo...
2017: PloS One
https://www.readbyqxmd.com/read/28809149/cumulibacter-manganitolerans-gen-nov-sp-nov-isolated-from-sludge-of-a-manganese-mine
#5
Jing Huang, Jiahong Li, Min Cao, Shuijiao Liao, Gejiao Wang
A Gram-stain-positive actinobacterium, designated as strain 2-36T, was isolated from sludge of a sewage outlet in a manganese mine. Phylogenetic analysis of 16S rRNA genes assigned strain 2-36T in a single lineage in the family Geodermatophilaceae and closely related to Modestobacter roseus KLBMP 1279T (93.8 % similarity), Blastococcus saxobsidens BC444T (93.1 %) and Geodermatophilus aquaeductus BMG801T (92.8 %). It contained iso-C16 : 0, iso-C15 : 0, C17 : 1ω6c, iso-C14 : 0 and summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c) as the major fatty acids (>5 %), with MK-9(H4), MK-8(H4) and MK-9(H6) as the quinones...
August 15, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28807555/improving-biogas-production-from-anaerobic-co-digestion-of-sewage-sludge-with-a-thermal-dried-mixture-of-food-waste-cheese-whey-and-olive-mill-wastewater
#6
A E Maragkaki, I Vasileiadis, M Fountoulakis, A Kyriakou, K Lasaridi, T Manios
Anaerobic co-digestion of sewage sludge and other organic wastes at a wastewater treatment plant (WWTP) is a promising method for both energy and material recovery. However, transportation and storage of wastes to WWTP may be the bottleneck for the successful implementation of this technology. In case of wet wastes and wastewater it is possible to reduce their volume and as a result the transportation and storage cost by using a drying process. During this study, the optimization of biogas production from sewage sludge (SS) was attempted by co-digesting with a dried mixture of food waste, cheese whey and olive mill wastewater (FCO)...
August 11, 2017: Waste Management
https://www.readbyqxmd.com/read/28807548/application-of-a-simple-column-switching-ion-chromatography-technique-for-removal-of-matrix-interferences-and-sensitive-fluorescence-determination-of-acidic-compounds-pharmaceutical-drugs-in-complex-samples
#7
Nadeem Muhammad, Qamar Subhani, Fenglian Wang, Dandan Guo, Qiming Zhao, Shuchao Wu, Yan Zhu
This work illustrates the introduction of a simple, rugged and flexible column-switching ion chromatography (IC) technique for an automated on-line QuEChERS extracted samples extracts washing followed by sensitive fluorescence (FLD) determination of five acidic pharmaceutical drugs namely; clofibric acid (CLO), ibuprofen (IBU), aspirin (ASP), naproxen (NAP) and flurobrofen (FLU) in three complex samples (spinach, apple and hospital sewage sludge). An old anion exchange column IonPac(®) AS11-HC was utilized as a pre-treatment column for on-line washing of inorganic and organic interferences followed by isocratic separation of five acidic drugs with another anion exchange IonPac(®) AS12A analytical column by exploiting the column-switching technique...
July 5, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28806704/chiral-pharmaceuticals-a-review-on-their-environmental-occurrence-and-fate-processes
#8
REVIEW
Edmond Sanganyado, Zhijiang Lu, Qiuguo Fu, Daniel Schlenk, Jay Gan
More than 50% of pharmaceuticals in current use are chiral compounds. Enantiomers of the same pharmaceutical have identical physicochemical properties, but may exhibit differences in pharmacokinetics, pharmacodynamics and toxicity. The advancement in separation and detection methods has made it possible to analyze trace amounts of chiral compounds in environmental media. As a result, interest on chiral analysis and evaluation of stereoselectivity in environmental occurrence, phase distribution and degradation of chiral pharmaceuticals has grown substantially in recent years...
August 5, 2017: Water Research
https://www.readbyqxmd.com/read/28806673/preservation-and-reactivation-of-candidatus-jettenia-asiatica-and-anammoxoglobus-propionicus-using-different-preservative-agents
#9
A Viancelli, M C Pra, L A Scussiato, M Cantão, A M G Ibelli, A Kunz
Anaerobic ammonium oxidation (anammox) bacteria have peculiar characteristics that make them difficult to cultivate. The conservation of these microorganisms in culture collections or laboratories requires successful preservation and reactivation techniques. Furthermore, studies have shown that successful reactivation may be preservative dependent. Considering this, the present study aimed to evaluate the preservation and reactivation of anammox consortia enriched from swine manure treatment lagoons, by using different preservative agents at different temperatures: KNO3 (at 4 °C), glycerol (-20 °C, -80 °C), and skimmed cow milk (-20 °C, -80 °C, -200 °C)...
July 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28806651/changes-in-the-process-performance-sludge-production-and-microbial-activity-in-an-activated-sludge-reactor-with-addition-of-a-metabolic-uncoupler-under-different-operating-conditions
#10
E Ferrer-Polonio, J Fernández-Navarro, J L Alonso-Molina, I Amorós-Muñoz, A Bes-Piá, J A Mendoza-Roca
Sludge production in wastewater treatment plants is nowadays a big concern due to the high produced amounts and their characteristics. Consequently, the study of techniques that reduce the sludge generation in wastewater treatment plants is becoming of great importance. In this work, four laboratory sequencing batch reactors (SBRs), which treated municipal wastewater, were operated to study the effect of adding the metabolic uncoupler 3,3',4',5-tetrachlorosalicylanilide (TCS) on the sludge reduction, the SBRs performance and the microbial hydrolytic enzymatic activities (MHEA)...
August 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28805503/the-effect-of-hydrolysis-on-combustion-characteristics-of-sewage-sludge-and-leaching-behavior-of-heavy-metals
#11
Mujahid Ali, Qunxing Huang, Bingcheng Lin, Binhang Hu, Wang Fei, Chi Yong
The aim of this paper is to present the effect of hydrolysis treatment on the thermal reaction characteristics of sludge and the leaching test of heavy metals contained in the sludge. Raw and hydrolysis treated sludge (at temperature of 200 °C and pressure 0.4MPa) samples were collected from local municipal sewage sludge treatment plant. Thermogravimetric analysis (TGA) was carried out between 25 to 900 °C at the heating rate of 10 and 20 °C/min under incineration and pyrolysis atmospheres. The leaching behavior of toxic heavy metals in the sludge was studied along with ash composition...
August 14, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28803764/effect-of-a-food-waste-disposer-policy-on-solid-waste-and-wastewater-management-with-economic-implications-of-environmental-externalities
#12
Amani Maalouf, Mutasem El-Fadel
In this study, the carbon footprint of introducing a food waste disposer (FWD) policy was examined in the context of its implications on solid waste and wastewater management with economic assessment of environmental externalities emphasizing potential carbon credit and increased sludge generation. For this purpose, a model adopting a life cycle inventory approach was developed to integrate solid waste and wastewater management processes under a single framework and test scenarios for a waste with high organic food content typical of developing economies...
August 10, 2017: Waste Management
https://www.readbyqxmd.com/read/28803340/emission-characteristics-of-pbdes-during-flame-retardant-plastics-extruding-process-field-investigation-and-laboratorial-simulation
#13
Chao Deng, Ying Li, Jinhui Li, Yuan Chen, Huafen Li
Though mechanical recycling of WEEE plastics is supposed to be a promising method, PBDEs release and the resulting contamination during its processing remain unclear yet. The distribution of PBDEs pollution in production lines was investigated from two flame-retardant plastic modification plants in Southern China. This was followed by laboratory simulation experiments to characterize the emission processes. PBDEs concentrations ranged from 37 to 31,305 ng/L in cooling water and from 40,043 to 216,653 ng/g dry wt in solid samples taken during the field investigation...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803273/transport-and-transformation-of-mercury-during-wet-flue-gas-cleaning-process-of-nonferrous-metal-smelting
#14
Zhilou Liu, Dongli Wang, Bing Peng, Liyuan Chai, Hui Liu, Shu Yang, Bentao Yang, Kaisong Xiang, Cao Liu
Reducing mercury emission is hot topic for international society. The first step for controlling mercury in fuel gas is to investigate mercury distribution and during the flue gas treatment process. The mercury transport and transformation in wet flue gas cleaning process of nonferrous smelting industry was studied in the paper with critical important parameters, such as the solution temperature, Hg(0) concentration, SO2 concentration, and Hg(2+) concentration at the laboratory scale. The mass ratio of the mercury distribution in the solution, flue gas, sludge, and acid fog from the simulated flue gas containing Hg(2+) and Hg(0) was 49...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803146/reforming-sewage-sludge-pyrolysis-volatile-with-fe-embedded-char-minimization-of-liquid-product-yield
#15
Guotao Yu, Dezhen Chen, Umberto Arena, Zhen Huang, Xiaohu Dai
Obtaining high quality syngas from sewage sludge (SS) means transferring a low-grade SS into a high-grade fuel or raw materials for chemical products. In this study, Fe is added to SS in form of Fe2(SO4)3 to produce an effective and self-sufficient catalyst in order to obtain more syngas and minimize liquid products from SS pyrolysis. The Fe-embedded sewage sludge chars (SSCs) were used as catalysts for volatile reforming at 600°C. It has been found that the gas yield increases from 15.9 to 35.8wt% of the SS and that of liquids decreases from 31...
August 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28803110/dynamics-of-microbial-activities-and-community-structures-in-activated-sludge-under-aerobic-starvation
#16
Wenlong Liu, Yongzhen Peng, Bin Ma, Linna Ma, Fangxu Jia, Xiyao Li
The knowledge of the effect of aerobic starvation on the functional bacterial activities and community structures is important for the recovery of nutrient removal in activated sludge system. Four aerobic starvation processes (3, 7, 14 and 30days) for nitrifiers and polyphosphate accumulating organisms (PAOs) were studied. The results showed that nitrifiers could utilize the released ammonium for growth during the first 7days of the aerobic starvation, and then gradually decayed. In the recovery period, the slower recovery ability of nitrite-oxidizing bacteria (NOB) than ammonium-oxidizing bacteria (AOB) contributed to the nitrite accumulation...
July 25, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803097/a-parametric-response-surface-study-of-fermentative-hydrogen-production-from-cheese-whey
#17
Masoumeh Akhlaghi, Maria Rosaria Boni, Giorgia De Gioannis, Aldo Muntoni, Alessandra Polettini, Raffaella Pomi, Andreina Rossi, Daniela Spiga
Batch factorial experiments were performed on cheese whey+wastewater sludge mixtures to evaluate the influence of pH and the inoculum-to-substrate ratio (ISR) on fermentative H2 production and build a related predictive model. ISR and pH affected H2 potential and rate, and the fermentation pathways. The specific H2 yield varied from 61 (ISR=0, pH=7.0) to 371L H2/kg TOCwhey (ISR=1.44gVS/g TOC, pH=5.5). The process duration range was 5.3 (ISR=1.44gVS/g TOC, pH=7.5) - 183h (ISR=0, pH=5.5). The metabolic products included mainly acetate and butyrate followed by ethanol, while propionate was only observed once H2 production had significantly decreased...
July 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803096/upgrading-of-the-symbiosis-of-nitrosomanas-and-anammox-bacteria-in-a-novel-single-stage-partial-nitritation-anammox-system-nitrogen-removal-potential-and-microbial-characterization
#18
Yuan Liu, Qigui Niu, Shaopo Wang, Jiayuan Ji, Yu Zhang, Min Yang, Toshimasa Hojo, Yu-You Li
A novel single-stage partial nitritation-anammox process equipped with porous functional suspended carriers was developed at 25°C in a CSTR by controlling dissolved oxygen <0.3mg/L. The nitrogen removal performance was almost unchanged over a nitrogen loading rate ranging from 0.5 to 2.5kgNH4(+)-N/m(3)/d with a high nitrogen removal efficiency of 81.1%. The specific activity of AOB and anammox bacteria was of 3.00g-N/g-MLVSS/d (the suspended sludge), 3.56g-N/g-MLVSS/d (the biofilm sludge), respectively...
July 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803071/responses-of-szarvasi-1-energy-grass-to-sewage-sludge-treatments-in-hydroponics
#19
Ambrus Rév, Brigitta Tóth, Ádám Solti, Gyula Sipos, Ferenc Fodor
Sewage sludge (SS) originating from communal wastewater is a hazardous material but have a potentially great nutritive value. Its disposal after treatment in agricultural lands can be a very economical and safe way of utilization once fast growing, high biomass, perennial plants of renewable energy production are cultivated. Szarvasi-1 energy grass (Elymus elongatus subsp. ponticus cv. Szarvasi-1), a good candidate for this application, was grown in hydroponics in order to assess its metal accumulation and tolerance under increasing SS amendments...
August 1, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28803054/decolorization-of-reactive-azo-dyes-using-a-sequential-chemical-and-activated-sludge-treatment
#20
Ken Meerbergen, Sam Crauwels, Kris A Willems, Raf Dewil, Jan Van Impe, Lise Appels, Bart Lievens
Textile wastewater contains high concentrations of organic substances derived from diverse dyes and auxiliary chemicals, some of which are non-biodegradable and/or toxic. Therefore, it is essential that textile wastewater is treated and that these substances are removed before being discharged into the environment. A combination of advanced oxidation processes (AOPs) to obtain partial dye degradation followed by a biological treatment has been suggested as a promising method for cost-effective decolorization of wastewater...
August 9, 2017: Journal of Bioscience and Bioengineering
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