Your search found 4 records
1 Kurosawa, K.; Hai, D. N.; Thanh, N. H.; Tra, H. T. L.; Ha, T. T. L.; Huy, T. Q.; Egashira, K. 2007. Monitoring of inorganic nitrogen in surface and groundwater at the intensive farming villages of the Red River Delta, Vietnam. Bulletin of the Institute of Tropical Agriculture, Kyushu University, 30: 29-38.
Water quality ; Monitoring ; Ammonium ; Nitrates ; Fertilizers ; Groundwater ; Surface water ; Canals ; Ponds ; Irrigation water ; Drinking water / Vietnam / Red River Delta
(Location: IWMI HQ Call no: P 8004 Record No: H041179)
2 Chinnasamy, Pennan; Hubbart, J. A. 2015. Stream and shallow groundwater nutrient concentrations in an Ozark forested riparian zone of the central USA. Environmental Earth Sciences, 73(10):6577-6590. [doi: https://doi.org/10.1007/s12665-014-3880-7]
Groundwater ; Surface water ; Stream flow ; Nutrients ; Nitrates ; Phosphorus ; Potassium ; Ammonium ; Hydrology ; Riparian zones ; Case studies / Central USA / Ozark Forest
(Location: IWMI HQ Call no: e-copy only Record No: H046717)
(1.12 MB)
Characterizing spatiotemporal variations in surface water (SW)–shallow groundwater (GW) nutrient concentrations is important to predict stream ecosystem responses to disturbance. Unfortunately, there is a lack of such information from mixed-deciduous semi-karst hydro-geological regions. Nitrate (NO3 -), total phosphorous (P), potassium (K) and ammonium (NH4 +) concentrations were monitored in a case study between an Ozark stream and riparian hardwood forest GW over the 2011 water year in the central USA. Average SW NO3 -, P, K and NH4 + concentrations were 0.53, 0.13, 3.29 and 0.06 mg L-1, respectively. Nine meters from the streambank, average GW NO3 -concentration was 0.01 mg L-1, while P, K and NH4 + concentrations were 0.03, 1.7 and 0.04 mg L-1, respectively. Hyperbolic dilution model results indicated that NO3 - and K exhibited dilution behavior, while NH4 + had a concentration effect and P was hydrologically constant. Observed seasonal NO3 - concentration patterns of winter maxima and summer minima in SW (1.164 and 0.133 mg L-1) and GW (0.019 and 0.011 mg L-1) were supported by previous studies yet exhibited distinct semi-karst characteristics. Results indicate that in addition to relatively low residence time, lower nutrient concentrations in GW (relative to SW) may suggest that shallow GW flow processes are important for vegetation removal and retention of nutrients from streams in semi-karst shallow groundwater systems of the central USA.
3 Drechsel, Pay. 2017. The Food-Energy Nexus is Closer to our Heart than we might think. Urban Agriculture Magazine, 32:3.
(Location: IWMI HQ Call no: e-copy only Record No: H048412)
http://www.ruaf.org/food-energy-nexus-closer-our-heart-we-might-think
https://vlibrary.iwmi.org/pdf/H048412.pdf
https://vlibrary.iwmi.org/pdf/H048412.pdf
Reflecting on the food-energy nexus, my first thought went to the Haber–Bosch process. Perhaps no other human invention has had a more dramatic impact on our wellbeing and mother Earth than the Haber-Bosch chemistry. As the reader might know, and I am citing here largely from Wikipedia, the Haber-Bosch process is the main industrial procedure for the production of ammonia fertiliser today. It is named after its inventors, the German chemists Fritz Haber and Carl Bosch, who developed it in the first half of the 20th century.
4 Ali, M.; Hong, P.-Y.; Mishra, H.; Vrouwenvelder, J.; Saikaly, P. E. 2022. Adopting the circular model: opportunities and challenges of transforming wastewater treatment plants into resource recovery factories in Saudi Arabia. Water Reuse, 12(3):346-365. [doi: https://doi.org/10.2166/wrd.2022.038]
Circular economy ; Models ; Resource recovery ; Wastewater treatment plants ; Water reuse ; Freshwater ; Municipal wastewater ; Water resources ; Water scarcity ; Water demand ; Technology ; Sludge ; Seawater ; Bioplastics ; Cellulose ; Ammonium ; Phosphates ; Infrastructure / Saudi Arabia
(Location: IWMI HQ Call no: e-copy only Record No: H051475)
https://iwaponline.com/jwrd/article-pdf/12/3/346/1113980/jwrd0120346.pdf
https://vlibrary.iwmi.org/pdf/H051475.pdf
https://vlibrary.iwmi.org/pdf/H051475.pdf
(1.28 MB) (1.28 MB)
With the ever-growing population, water, energy, and resources need to be used carefully, reused, and renewed. There is an increasing global interest in resource recovery from ‘waste’, which is driven by sustainability and environmental concerns and motivated by the potential for economic benefits. A new era in waste (water) management is being realized where wastewater treatment is becoming part of the circular economy by integrating the production of reusable water with energy and resource recovery. In this new perspective, wastewater is no longer seen as a waste to be treated with energy expenditure but rather as a valuable source of freshwater, energy, nutrients (nitrogen and phosphorous), and materials (e.g., bioplastics, cellulose fibres, and alginate). In this review paper, the conversion of wastewater treatment plants (WWTPs) into resource recovery factories (RRFs) is presented as one of the ways forward to achieve a circular economy in the water sector for the Kingdom of Saudi Arabia (KSA). The advanced technologies, some highlighted in the article, can be installed, integrated, or retrofitted into existing WWTPs to create RRFs enabling the recovery of freshwater, cellulose, alginate-like exopolymers (bio-ALE), and biogas from municipal wastewater achieving climate neutrality, decarbonization, and production of new and promising resources. The article highlights the need for modular, adaptive, and/or decentralized approaches using sustainable technologies such as aerobic granular sludge (AGS)-gravity-driven membrane (AGS-GDM), anaerobic electrochemical membrane bioreactor (AnEMBR), and anaerobic membrane bioreactor (AnMBR) for conducive localized water reuse. The increase in reuse will reduce the pressure on non-renewable water resources and decrease dependency on the energy-intensive desalination process. This article also outlines the water challenges that are arising in KSA and what are the major water research programmes/themes undertaken to address these major challenges.
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