scholarly journals Decentralised wastewater treatment effluent fertigation: preliminary technical assessment

Water SA ◽  
2018 ◽  
Vol 44 (2 April) ◽  
Author(s):  
W Musazura ◽  
AO Odindo ◽  
EH Tesfamariam ◽  
JC Hughes ◽  
CA Buckley
Keyword(s):  
Wastewater Treatment ◽  
Agricultural Land ◽  
Irrigation System ◽  
Tap Water ◽  
Block Design ◽  
Phosphorus Uptake ◽  
Chemical Properties ◽  
Nitrogen And Phosphorus ◽  
Wastewater Treatment Effluent ◽  
Nitrogen And Phosphorus Uptake

The Decentralised Wastewater Treatment System (DEWATS) can provide a potential sanitation solution to residents living in informal settlements with the effluent produced being used on agricultural land. This paper reports on a first step to assess the technical viability of this concept. To do so a pilot DEWATS plant was connected to 83 houses in the eThekwini Municipality. An experiment was conducted in a randomised complete block design with 2 treatments (DEWATS effluent irrigation and tap water irrigation + fertiliser) and 3 blocks. Banana and taro crops were irrigated using an automated drip irrigation system. Data on the weather, crop growth, nitrogen and phosphorus uptake and soil chemical properties were collected. Irrigation with DEWATS effluent was comparable to tap water + fertiliser especially for banana growth and biomass production. Banana and taro required 3 514 mm of irrigation effluent. About 0.0117 ha·household−1 (23.3 m2·person−1) was found to be an adequate area for effluent reuse. Wet-weather storage requirements were calculated to be about 9.2 m3·household−1. DEWATS effluent, after passing through a horizontal flow wetland, was unable to meet banana and taro nitrogen and phosphorus requirements. Nutrient monitoring is required when using anaerobic filter effluent from a DEWATS for irrigating banana and taro. 

scholarly journals Method of biochar application affects growth, yield and nutrient uptake of cowpea

2020 ◽  
Vol 5 (1) ◽  
pp. 352-360
Author(s):  
Edward Yeboah ◽  
Gideon Asamoah ◽  
Patrick Ofori ◽  
Ben Amoah ◽  
Kwaku Osei Adu Agyeman
Keyword(s):  
Nutrient Uptake ◽  
Block Design ◽  
Phosphorus Uptake ◽  
Growth Yield ◽  
Growth And Yield ◽  
Shoot Biomass ◽  
Nitrogen And Phosphorus ◽  
Yield Data ◽  
Nitrogen And Phosphorus Uptake ◽  
Methods Of Application

AbstractBiochar produced from pyrolysis of organic materials has been found to improve plant growth by improving the physical and chemical characteristics of the soil as well as enhancing the sequestration of carbon dioxide that would release into the atmosphere through the decomposition of organic residues. However, there is scanty information on the methods used to apply biochar in order to optimize the benefits of biochar use for agricultural production. In view of this, a field study was carried out at the experimental field of CSIR – Soil Research Institute, Kumasi, to assess the effect of method of biochar application on the growth, yield and nutrient uptake of cowpea (Vigna unguiculata) in a moderately acidic sandy Ferric Acrisol. The experiment was set up using a Randomized Complete Block Design with three replications. The treatments imposed were as follows: control, broadcasting, spot and ring methods of application. The parameters assessed included growth and yield data as well as nitrogen and phosphorus uptake in shoots and grains. The data collected were subjected to analysis of variance using Genstat 12th edition. The results showed that the spot and ring methods of application significantly enhanced height, girth, nodule number and dry weight, shoot biomass and grain yield as well as nitrogen and phosphorus contents in shoots and grains when compared with the broadcasting method and control. This study therefore recommends the spot and ring methods of biochar application for adoption in cowpea production for enhanced growth, yield and nitrogen and phosphorus uptake.

scholarly journals Short-Rotation Willows as a Wastewater Treatment Plant: Biomass Production and the Fate of Macronutrients and Metals

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 554
Author(s):  
Darja Istenič ◽  
Gregor Božič
Keyword(s):  
Wastewater Treatment ◽  
Biomass Production ◽  
Biomass Yield ◽  
Wastewater Treatment Plants ◽  
Phosphorus Uptake ◽  
Woody Biomass ◽  
Nutrient Recovery ◽  
Nitrogen And Phosphorus ◽  
Shoot Number ◽  
Nitrogen And Phosphorus Uptake

Evapotranspirative willow systems (EWS) are zero-discharge wastewater treatment plants that produce woody biomass and have no discharge to surface or groundwater bodies. The influence of wastewater on the growth of three clones of Salix alba (‘V 093’, ‘V 051’ and ‘V 160’) and the distribution of macronutrients and metals in a pilot EWS receiving primary treated municipal wastewater was studied under a sub-Mediterranean climate. The influent wastewater, shoot number, stem height, and biomass production at coppicing were monitored in two consecutive two-year rotations. Soil properties and the concentrations of macronutrients and metals in soil and woody biomass were analyzed after the first rotation. S. alba clones in EWS produced significantly more woody biomass compared to controls. ‘V 052’ produced the highest biomass yield in both rotations (38–59 t DM ha−1) and had the highest nitrogen and phosphorus uptake (48% and 45%) from wastewater. Nitrogen and phosphorus uptake into the harvestable woody biomass was significantly higher in all clones studied compared to other plant-based wastewater treatment plants, indicating the nutrient recovery potential of EWS. The indigenous white willow clone ‘V 160’ had the lowest biomass yield but absorbed more nutrients from wastewater compared to ‘V 093’. Wastewater composition and load were consistent with the nutrient requirements of the willows; however, an increase in salinity was observed after only two years of operation, which could affect EWS efficiency and nutrient recovery in the long term.

scholarly journals Nitrogen and phosphorus fluxes in three soils fertigated with decentralised wastewater treatment effluent to field capacity

2019 ◽  
Vol 9 (2) ◽  
pp. 142-151 ◽  
Author(s):  
W. Musazura ◽  
A. O. Odindo ◽  
E. H. Tesfamariam ◽  
J. C. Hughes ◽  
C. A. Buckley
Keyword(s):  
Wastewater Treatment ◽  
Tap Water ◽  
Low Cost ◽  
Field Capacity ◽  
P Uptake ◽  
N Leaching ◽  
Wastewater Management ◽  
Nitrogen And Phosphorus ◽  
Wastewater Treatment Effluent ◽  
P Leaching

Abstract The Decentralised Wastewater Treatment System (DEWATS) provides low cost onsite sanitation to residents living in informal settlements. Wastewater management through agriculture prevents environmental pollution and promotes sustainable agriculture. This study investigated the effects of fertigation with DEWATS effluent to field capacity in three South African soils under a banana crop. The experiment was conducted as a complete randomised design in a greenhouse with two irrigation water treatments (DEWATS effluent vs municipal tap water irrigation + fertiliser) × three soil types (Ia, Cf and Se) and four replicates over 728 days. Data were collected on crop growth, nitrogen (N) and phosphorus (P) uptake and dynamics in the soil. The DEWATS effluent significantly (p < 0.05) increased N and P uptake and soil NH+4-N and extractable P concentrations. Furthermore, DEWATS effluent fertigation significantly (p < 0.05) increased N leaching from the Ia soil and P leaching from the Cf soil. Nitrogen and phosphorus leaching from DEWATS was lower than the tap water irrigation + fertiliser treatment. There was, however, excess N and P accumulation from the DEWATS than the irrigation + fertiliser treatment, which would cause environmental concerns from runoff and leaching losses in the medium to long term.

scholarly journals Response of vegetative growth and chemical properties in tomato plant (Tariz) for organic fertilization.

2019 ◽  
pp. 51-66
Author(s):  
Halemah M. Amhamed ◽  
Ahmed. I. Sharaf ◽  
Salaheddin B. Elbelazi ◽  
Moftah A. Assofal ◽  
Amal E. Alhishni
Keyword(s):  
Tomato Plant ◽  
Agricultural Land ◽  
Block Design ◽  
Organic Fertilizer ◽  
Chemical Properties ◽  
Cattle Manure ◽  
Control Treatment ◽  
Average Weight ◽  
Organic Fertilization ◽  
And Chemical Properties

The experiment was carried out in agricultural land in Sorman between 4 - 2017 to 7 - 2017, in the design of Randomized Complete Block Design (RCBD) to study the response of vegetative traits and chemical properties in the tomato plant of Tariz for organic fertilization, by 6 treatments and 3 replicates, For SPSS statistical analysis at a significant level of LSD 0.05). The experiment included four types of semi-decomposed organic fertilizer (sheep manure, cattle manure, camel manure, horse manure) in 6 treatments, in addition to the control treatment, which included four treatments for each type of organic fertilizer as: fertilizer: soil by ratio (1: 3) that is 5Kg of fertilizer : 15 kg of soil, mixed treatment of fertilizer : soil (1: 1) (10 kg of fertilizer: 10 kg of soil), and double treatment (3: 1) (15 kg of fertilizer: 5 kg soil). The seedlings were planted in experimental units of 7.20 m2. The seedlings were treated in biological control using the garlic extract for insect protection after 15 days of planting, as well as the addition of simple proportions of hay as a cover to reduce the growth of herbs. The experiment showed that the treatment of cattle manure significantly increased most of the studied morphological traits (length of root, plant length, number of flowers, number of leafy branches), as well as significant increase in fresh and dry weight of leaves and average weight of five fruits.. There were significant differences in the content of the N, P in leaves and NPK elements in the fruits, while there was a significant increase in vitamin C content in fruits for all treatments.

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