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https://www.readbyqxmd.com/read/28550636/the-role-of-algae-in-agriculture-a-mathematical-study
#1
P K Tiwari, A K Misra, Ezio Venturino
Synthetic fertilizers and livestock manure are nowadays widely used in agriculture to improve crop yield but nitrogen and phosphorous runoff resulting from their use compromises water quality and contributes to eutrophication phenomena in waterbeds within the countryside and ultimately in the ocean. Alternatively, algae could play an important role in agriculture where they can be used as biofertilizers and soil stabilizers. To examine the possible reuse of the detritus generated by dead algae as fertilizer for crops, we develop three mathematical models building upon each other...
May 27, 2017: Journal of Biological Physics
https://www.readbyqxmd.com/read/28500550/reclamation-of-heavy-metals-from-contaminated-soil-using-organic-acid-liquid-generated-from-food-waste-removal-of-cd-cu-and-zn-and-soil-fertility-improvement
#2
Shijin Dai, Yang Li, Tao Zhou, Youcai Zhao
Food waste fermentation generates complicated organic and acidic liquids with low pH. In this work, it was found that an organic acid liquid with pH 3.28 and volatile low-molecular-weight organic acid (VLMWOA) content of 5.2 g/L could be produced from food wastes after 9-day fermentation. When the liquid-to-solid ratio was 50:1, temperature was 40 °C, and contact time was 0.5-1 day, 92.9, 78.8, and 52.2% of the Cd, Cu, and Zn in the contaminated soil could be washed out using the fermented food waste liquid, respectively...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28441624/various-soil-amendments-and-environmental-wastes-affect-the-im-mobilization-and-phytoavailability-of-potentially-toxic-elements-in-a-sewage-effluent-irrigated-sandy-soil
#3
Sabry M Shaheen, Mohamed S Shams, Mohamed R Khalifa, Mohamed A El-Dali, Jörg Rinklebe
Contamination of long-term sewage effluent irrigated soils by potentially toxic elements (PTEs) is a serious concern due to its high environmental and health risk. Our scientific hypothesis is that soil amendments can cause contradictory effects on the element mobilization and phytoavailability depending on the type of element and amendment. Therefore, we aimed to assess the impact of the application (1%) of several low cost amendments and environmental wastes on the (im)mobilization, availability, and uptake of Al, Cd, Cr, Cu, Fe, Mn, Ni, and Zn by sorghum (Sorghum bicolor) in a long term sewage effluent irrigated sandy soils collected from Egypt...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28433639/optimization-of-atrazine-and-imidacloprid-removal-from-water-using-biochars-designing-single-or-multi-staged-batch-adsorption-systems
#4
Abhishek Mandal, Neera Singh
BACKGROUND: Contamination of surface and ground water by pesticides from agricultural runoff and industrial discharge is one of the main causes of aqueous contaminations world over. Biochar, agricultural waste derived highly aromatic substance produced after pyrolysis and carbonification of biomass have exhibited good adsorption capacity for pesticides and can be used to develop on-site bio-purification systems for organic contaminant removal from polluted waters. However, high amounts of adsorbent required in single stage-batch sorption plant increases the cost of water treatment; therefore, multistage plant systems were investigated...
April 5, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28432993/chemical-biological-and-dna-markers-for-tracing-slaughterhouse-effluent
#5
P J Harvey, M P Taylor, H K Handley, S Foster, M R Gillings, A J Asher
Agricultural practices, if not managed correctly, can have a negative impact on receiving environments via waste disposal and discharge. In this study, a chicken slaughter facility on the rural outskirts of Sydney, Australia, has been identified as a possible source of persistent effluent discharge into a peri-urban catchment. Questions surrounding the facility's environmental management practices go back more than four decades. Despite there having never been a definitive determination of the facility's impact on local stream water quality, the New South Wales Environment Protection Authority (NSW EPA) has implemented numerous pollution reduction requirements to manage noise and water pollution at the slaughter facility...
April 26, 2017: Environmental Research
https://www.readbyqxmd.com/read/28332819/path-to-impact-for-autonomous-field-deployable-chemical-sensors-a-case-study-of-in-situ-nitrite-sensors
#6
Tim M Schierenbeck, Matthew C Smith
Natural freshwater systems have been severely affected by excess loading of macronutrients (e.g., nitrogen and phosphorus) from fertilizers, fossil fuels, and human and livestock waste. In the USA, impacts to drinking water quality, biogeochemical cycles, and aquatic ecosystems are estimated to cost US$210 billion annually. Field-deployable nutrient sensors (FDS) offer potential to support research and resource management efforts by acquiring higher resolution data than are currently supported by expensive conventional sampling methods...
April 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28213306/phosphorous-extractability-and-ryegrass-availability-from-bio-waste-composts-in-a-calcareous-soil
#7
Marco Grigatti, Elisa Boanini, Silvia Mancarella, Andrea Simoni, Massimo Centemero, Adrie H M Veeken
In this work four stable bio-waste composts (C1, C2, C3, C4) were selected on the basis of their increasing water soluble P (H2O-P). The P speciation was assessed via sequential chemical extraction (SCE) on the same products. Moreover, the plant-available P was assessed via apparent recovery fraction approach (ARF) in a pot test on ryegrass over 21 weeks at 15 mg P kg(-)(1) of soil. An inorganic P source (P-chem) was added as a reference at the same P rate in addition to a non-fertilized control (Control)...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28006710/predicting-scale-formation-during-electrodialytic-nutrient-recovery
#8
Emma Thompson Brewster, Andrew J Ward, Chirag M Mehta, Jelena Radjenovic, Damien J Batstone
Electro-concentration of nutrients from waste streams is a promising technology to enable resource recovery, but has several operational concerns. One key concern is the formation of inorganic scale on the concentrate side of cation exchange membranes when recovering nutrients from wastewaters containing calcium, magnesium, phosphorous and carbonate, commonly present in anaerobic digester rejection water. Electrodialytic nutrient recovery was trialed on anaerobic digester rejection water in a laboratory scale electro-concentration unit without treatment (A), following struvite recovery (B), and following struvite recovery as well as concentrate controlled at pH 5 for scaling control (C)...
March 1, 2017: Water Research
https://www.readbyqxmd.com/read/27817922/characterization-of-pesticide-sorption-behaviour-of-slow-pyrolysis-biochars-as-low-cost-adsorbent-for-atrazine-and-imidacloprid-removal
#9
Abhishek Mandal, Neera Singh, T J Purakayastha
Agri-wastes biochars viz. eucalyptus bark (EBBC), corn cob (CCBC), bamboo chips (BCBC), rice husk (RHBC) and rice straw (RSBC) and acid treated RSBC (T-RSBC), were characterized for their physico-chemical properties and sorption behaviour of atrazine and imidacloprid was studied. Kinetics study suggested that except atrazine adsorption on RSBC, which was best explained by the pseudo second order model, sorption of atrazine and imidacloprid on biochars was well explained by the modified Elovich model. Among the five normal biochars, the RSBC showed the maximum atrazine (37...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27788362/innovative-approach-for-recycling-phosphorous-from-agro-wastewaters-using-water-treatment-residuals-wtr
#10
Iris Zohar, James A Ippolito, Michael S Massey, Iggy M Litaor
Phosphorus capture from polluting streams and its re-use using industrial byproducts has the potential to also reduce environmental threats. An innovative approach was developed for P removal from soil leachate and dairy wastewater using Al-based water treatment residuals (Al-WTR) to create an organic-Al-WTR composite (Al/O-WTR), potentially capable of serving as a P fertilizer source. Al-WTR was mixed with either soil leachate, or with dairy wastewater, both of which contained elevated P concentrations (e...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27692514/from-municipal-industrial-wastewater-sludge-and-fog-to-fertilizer-a-proposal-for-economic-sustainable-sludge-management
#11
Božidar Bratina, Andrej Šorgo, Janez Kramberger, Urban Ajdnik, Lidija Fras Zemljič, Janez Ekart, Riko Šafarič
After a ban on the depositing of untreated sludge in landfills, the sludge from municipal and industrial water-treatment plants can be regarded as a problem. Waste products of the water treatment process can be a problem or an opportunity - a source for obtaining raw materials. In the European Union, raw sludge and fats, oil and grease (FOG) from municipal and industrial wastewater treatment plants (WWTP) cannot be deposited in any natural or controlled environment. For this reason, it must be processed (stabilized, dried) to be used later as a fertilizer, building material, or alternative fuel source suitable for co-incineration in high temperature furnaces (power plants or concrete plants)...
December 1, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27472049/waste-recycling-by-vermicomposting-maturity-and-quality-assessment-via-dehydrogenase-enzyme-activity-lignin-water-soluble-carbon-nitrogen-phosphorous-and-other-indicators
#12
Hossein Alidadi, Ahmad Hosseinzadeh, Ali Asghar Najafpoor, Habibollah Esmaili, Jafar Zanganeh, Maryam Dolatabadi Takabi, Fardin Ghasemy Piranloo
Present study aims to examine the dynamics of maturation and qualification indicators in various vermicompost treatments and selection of the best treatment along with best maturation time in this regard. In this empirical study, dynamics of chemical (pH, electrical conductivity (EC), total nitrogen (TN), phosphorous, lignin, water soluble carbon (WSC), C/N, NH4/NO3) and biological (dehydrogenase enzyme (DEH) and DEH/WSC) properties were investigated in four various treatments, including various ratios of compost produced from municipal solid waste (MSW) and carbonaceous materials (50:50, 70:30, 85:15 and 100:0) over 100 days...
November 1, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27463402/mesocarbon-microbead-carbon-supported-magnesium-hydroxide-nanoparticles-turning-spent-li-ion-battery-anode-into-a-highly-efficient-phosphate-adsorbent-for-wastewater-treatment
#13
Yan Zhang, Xingming Guo, Feng Wu, Ying Yao, Yifei Yuan, Xuanxuan Bi, Xiangyi Luo, Reza Shahbazian-Yassar, Cunzhong Zhang, Khalil Amine
Phosphorus in water eutrophication has become a serious problem threatening the environment. However, the development of efficient adsorbents for phosphate removal from water is lagging. In this work, we recovered the waste material, graphitized carbon, from spent lithium ion batteries and modified it with nanostructured Mg(OH)2 on the surface to treat excess phosphate. This phosphate adsorbent shows one of the highest phosphate adsorption capacities to date, 588.4 mg/g (1 order of magnitude higher than previously reported carbon-based adsorbents), and exhibits decent stability...
August 24, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27329062/flocculent-settling-of-food-wastes
#14
Mohammad Monirul Islam Chowdhury, Mingu Kim, Basem Mikhaeil Haroun, George Nakhla, Michael Keleman
This study evaluated the flocculent settling in water and municipal wastewater (MWW) in a 10.6 ft deep column. A total of eight runs at three different testing conditions involving MWW alone, food waste (FW) alone, and FW in MWW (FW+MWW) were conducted. Total suspended solid (TSS), total BOD (TBOD), total COD (TCOD), total nitrogen (TN), and total phosphorous (TP) removal efficiencies after 3 hours of settling were 62%, 46%, 49%, 46% and 62% for FW, and 50%, 43%, 39%, 37% and 24% for MWW. Removal efficiencies of particulate COD (PCOD) and particulate BOD (PBOD) at the lowest surface overflow rate (SOR) of 1...
July 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27260530/selective-withdrawal-optimization-in-river-reservoir-systems-trade-offs-between-maximum-allowable-receiving-waste-load-and-water-quality-criteria-enhancement
#15
Fariborz Masoumi, Abbas Afshar, Sedigheh Torabi Palatkaleh
In this paper, a new systematic approach is designed to maximize the demand coverage and receiving waste load by river-reservoir systems while enhancing water quality criteria. The approach intends to control the reservoir eutrophication while developing a trade-off between the maximum receiving load and shortage on demand coverage. To simulate the system, a hybrid process-based and data-driven model is tailored. Initially, the two-dimensional hydrodynamics and water quality simulation model (CE-QUAL-W2) is linked with an effective single and/or multiple optimization algorithms (PSO) to evaluate the proposed scenarios...
July 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27179297/enhanced-phosphorus-removal-from-wastewater-by-growing-deep-sea-bacterium-combined-with-basic-oxygen-furnace-slag
#16
Weizhi Zhou, Zhaosong Huang, Cuiping Sun, Haixia Zhao, Yuzhong Zhang
As one solid waste with potential for phosphorus removal, application of slags in water treatment merits attention. But it was inhibited greatly by alkaline solution (pH>9.5) and cemented clogging generated. To give one solution, phosphorus removal was investigated by combining deep-sea bacterium Alteromonas 522-1 and basic oxygen furnace slag (BOFS). Results showed that by the combination, not only higher phosphorous removal efficiency (>90%) but also neutral solution pH of 7.8-8.0 were achieved at wide ranges of initial solution pH value of 5...
August 2016: Bioresource Technology
https://www.readbyqxmd.com/read/26951721/phosphorous-recovery-from-sewage-sludge-ash-suspended-in-water-in-a-two-compartment-electrodialytic-cell
#17
Lisbeth M Ottosen, Pernille E Jensen, Gunvor M Kirkelund
Phosphorus (P) is indispensable for all forms of life on Earth and as P is a finite resource, it is highly important to increase recovery of P from secondary resources. This investigation is focused on P recovery from sewage sludge ash (SSA) by a two-compartment electrodialytic separation (EDS) technique. Two SSAs are included in the investigation and they contained slightly less P than phosphate rock used in commercial fertilizer production and more heavy metals. The two-compartment electrodialytic technique enabled simultaneous recovery of P and separation of heavy metals...
May 2016: Waste Management
https://www.readbyqxmd.com/read/26566540/assessment-of-microbial-populations-within-chicago-area-nearshore-waters-and-interfaces-with-river-systems
#18
Emily Sible, Alexandria Cooper, Kema Malki, Katherine Bruder, Thomas Hatzopoulos, Siobhan C Watkins, Catherine Putonti
The Chicago area locks separate and control water flow between the freshwaters of Lake Michigan and the network of Illinois waterways. Under extreme storm conditions, however, the locks are opened and storm waters, untreated waste, and runoff are released directly into the lake. These combined sewer overflow (CSO) events introduce microbes, viruses, and nutrients such as nitrogen and phosphorous into nearshore waters which likely affect the native species. We collected surface water samples from four Chicago area beaches - Gillson Park, Montrose Beach, 57th Street Beach, and Calumet Beach - every two weeks from May 13 through August 5, 2014...
December 2015: Data in Brief
https://www.readbyqxmd.com/read/26521546/performance-and-cost-evaluation-of-constructed-wetland-for-domestic-waste-water-treatment
#19
V T Deeptha, J S Sudarsan, G Baskar
Root zone treatment through constructed wetlands is an engineered method of purifying wastewater. The aim of the present research was to study the potential of wetland plants Phragmites and Typha in treatment of wastewater and to compare the cost of constructed wetlands with that of conventional treatment systems. A pilot wetland unit of size 2x1x0.9 m was constructed in the campus. 3x3 rows of plants were transplanted into the pilot unit and subjected to wastewater from the hostels and other campus buildings...
September 2015: Journal of Environmental Biology
https://www.readbyqxmd.com/read/26476058/linking-climate-change-mitigation-and-coastal-eutrophication-management-through-biogas-technology-evidence-from-a-new-danish-bioenergy-concept
#20
Bjarke Stoltze Kaspersen, Thomas Budde Christensen, Anders Michael Fredenslund, Henrik Bjarne Møller, Michael Brian Butts, Niels H Jensen, Tyge Kjaer
The interest in sustainable bioenergy solutions has gained great importance in Europe due to the need to reduce GHG emissions and to meet environmental policy targets, not least for the protection of groundwater and surface water quality. In the Municipality of Solrød in Denmark, a novel bioenergy concept for anaerobic co-digestion of food industry residues, manure and beach-cast seaweed has been developed and tested in order to quantify the potential for synergies between climate change mitigation and coastal eutrophication management in the Køge Bay catchment...
January 15, 2016: Science of the Total Environment
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