scholarly journals Effect of the Use Treated Wastewater on Microbial Contamination of Soils of Urban Landscapes

2019 ◽  
Vol 7 (1) ◽  
pp. 42-52
Author(s):  
Afsaneh Khamisabadi ◽  
Kamran Parvanak ◽  
Mahnaz Nasrabadi ◽  
◽  
◽  
...  
Keyword(s):  
Microbial Contamination ◽  
Treated Wastewater ◽  
Urban Landscapes ◽  
Contamination Of Soils

Comparable levels of microbial contamination in soil and on tomato crops after drip irrigation with treated wastewater or potable water

2016 ◽  
Vol 215 ◽  
pp. 140-150 ◽  
Author(s):  
Ezra Orlofsky ◽  
Nirit Bernstein ◽  
Mollie Sacks ◽  
Ahuva Vonshak ◽  
Maya Benami ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Microbial Contamination ◽  
Potable Water ◽  
Treated Wastewater

Application of real treated wastewater to starch production by microalgae: Potential effect of nutrients and microbial contamination

2021 ◽  
Vol 169 ◽  
pp. 107973
Author(s):  
Mana Noguchi ◽  
Ryo Aizawa ◽  
Daisuke Nakazawa ◽  
Yoshiki Hakumura ◽  
Yasuhiro Furuhashi ◽  
...  
Keyword(s):  
Microbial Contamination ◽  
Potential Effect ◽  
Treated Wastewater ◽  
Starch Production

scholarly journals Reclaimed Water Project: Effects of High Na Concentration in Soil and Plant Tissues

2020 ◽  
Vol 9 (4) ◽  
pp. 1181-1187
Keyword(s):  
Sodium Content ◽  
Organic Content ◽  
Treated Wastewater ◽  
Plant Tissues ◽  
Urban Landscapes ◽  
Sodium Accumulation ◽  
High Sodium ◽  
Fine Grained ◽  
Treated Effluent ◽  
Long Time

Clark Water Corporation (CWC) intends to reclaim its treated wastewater (WW) for turf grass irrigation in golf courses and other urban landscapes. CWC’s treated effluent meets the DA (DAO 26) irrigation standard except for sodium which exceed by an average of 17%; creating the need to study the effects of high Na concentration of WW in soils and plant tissues. Soil samples were compiled from 3 sites; 2 from target irrigation sites, P.Balagtas and Korea CC and 1 from the final pond of the Wastewater Treatment Plant’s (WWTP) to replicate long-time irrigated soils. Soils were transferred to experimental plots, planted with foliage and irrigated for 5 months with equal amounts of WW. Results indicate that soils from the target sites are fine grained sandy soils and that WW irrigation have improved their structure and porosity. Calcium and magnesium levels spiked with calcium increasing 60 folds while magnesium levels surging by more than 1000 folds. Soil sodium levels increased by an average of 70% while organic content dropped by an average of 119%. Variances between the former and latter parameters were more prominent with the Korea CC soils. Planted foliage have exhibited tolerance from the high sodium content of irrigation water. Foliage taken from the Korea CC plots generally performed better in the uptake of nutrients as compared to those harvested from P. Balagtas. Disturbingly, all harvested foliage exhibited uptake of arsenic which can be attributed to soil background contamination. Although it cannot be inferred in the experiment, potential problems associated with long-term nutrient build up may arise. Ideally, these effects can be countered by the amount of rainfall and its associated leeching. This anticipation is backed-up by the lack of sodium accumulation from 3rd soil sample taken in proximity of the WWTP final pond

scholarly journals An estimate of the willingness to pay for treated wastewater for irrigation in Oman

2016 ◽  
Vol 21 ◽  
pp. 57 ◽  
Author(s):  
Slim Zekri ◽  
Samiha Al Harthi ◽  
Hemesiri Kotagama ◽  
Shekar Bose
Keyword(s):  
Wastewater Treatment ◽  
Willingness To Pay ◽  
Wastewater Treatment Plants ◽  
Contingent Valuation Method ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Urban Landscapes ◽  
Private Companies ◽  
Face To Face ◽  
Valuation Method

The volume of Treated Wastewater (TW) produced in Oman is increasing, due to increased connection of houses to the sewage network and increased construction of wastewater treatment plants. Despite 68% of the TW been used for irrigating urban landscapes, 10.3 Mm3 TW has been discharged to the sea in 2014. Wastewater treatment plants are owned and operated by private companies, which aspire to sell excess TW, particularly to farmers, in order to recover cost of wastewater treatment. This paper has used the Contingent Valuation Method (CVM) to estimate the farmers’ Willingness to Pay (WTP) for TW for farm irrigation. Seventy two farmers responded to a face-to face interview on eliciting WTP to purchase TW as irrigation water, out of a total population of 400 farmers in Seeb region who have farms in proximity to a wastewater treatment plant. The results indicated that farmers’ WTP for TW was on average 0.111 OR/m3. WTP for TW was significantly affected by the income of farmers and whether the farm is a market oriented or non-market hobby oriented farm. The percentage of farmers willing to pay the average price or higher was 38%. Most farmers are not willing to pay the price currently charged by the wastewater treatment company for landscaping irrigation (0.220 OR/m3) given the large volumes required for farm irrigation. Even rich farmers maintaining hobby farms are willing to pay only 0.128 OR/m3 versus 0.087 OR/m3 by the market oriented farmers. The WTP for TW is higher than the prices reported (OR 0.005 to 0.023 OR/ m3) for groundwater used in agriculture in Oman. . 

scholarly journals Possible Use of Treated Wastewater as Irrigation Water at Urban Green Area

2014 ◽  
Vol 3 (1) ◽  
pp. 35 ◽  
Author(s):  
Elif Bozdoğan
Keyword(s):  
Water Resources ◽  
Plant Growth ◽  
Fresh Water ◽  
Irrigation Water ◽  
Growth Parameters ◽  
Treated Wastewater ◽  
Urban Landscapes ◽  
Monthly Basis ◽  
Negative Impacts ◽  
Positive Impacts

Ever increasing demands for fresh water resources have brought the reuse of treated wastewater into agendas. Wastewater has year-long potential to be used as an irrigation water source. Therefore, treated wastewater is used as irrigation water over agricultural lands and urban landscapes, as process water in industrial applications, as back-up water in environmental applications in water resources and wetlands of dry regions. The present study was conducted to investigate the possible use of domestic wastewater treated through pilot-scale constructed wetland of Adana-Karaisalı with dominant Mediterranean climate in irrigation of marigold (Tagetes erecta), commonly used over urban landscapes. Experiments were carried out between the dates May-November 2008 for 7 months with fresh water and treated wastewater. Plant growth parameters (plant height, plant diameter, number of branches) and flowering parameters (number of flowers, flower diameter, flower pedicle thickness) were monitored in monthly basis. Results revealed positive impacts of treated wastewater irrigations on plant growth during the initial 5 months between May-September but negative impacts in October and November. Similarly, treated wastewater irrigations had positive impacts on flowering parameters during the initial 3 months but had negative impacts during the subsequent 4 months. Such a case indicated shortened visual efficiencies of marigold. Therefore, treated wastewater can be used as an alternative water resource in irrigation of annual flowers, but better results can be attained by mixing treated wastewater with fresh water at certain ratios.

DECOLOURIZATION AND COD REMOVAL OF WASEWATER FROM ETHANOL PRODUCTION PROCESS FROM MOLASSES BY COAGULANTION USING INORGANIC ALUM

2010 ◽  
Vol 13 (3) ◽  
pp. 92-102
Author(s):  
Trung Duc Le
Keyword(s):  
Ethanol Production ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Treated Wastewater ◽  
Treatment Processes ◽  
Physico Chemical ◽  
Biological Methods ◽  
Treatment Step ◽  
Main Material

The industrial production of ethanol by fermentation using molasses as main material that generates large quantity of wastewater. This wastewater contains high levels of colour and chemical oxygen demand (COD), that may causes serious environmental pollution. Most available treatment processes in Vietnam rely on biological methods, which often fail to treat waste water up to discharge standard. As always, it was reported that quality of treated wastewater could not meet Vietnameses discharge standard. So, it is necessary to improve the treatment efficiency of whole technological process and therefore, supplemental physico-chemical treatment step before biodegradation stage should be the appropriate choice. This study was carried out to assess the effect of coagulation process on decolourization and COD removal in molasses-based ethanol production wastewater using inorganic coaglutant under laboratory conditions. The experimental results showed that the reductions of COD and colour with the utilization of Al2(SO4)3 at pH 9.5 were 83% and 70%, respectively. Mixture FeSO4 – Al2(SO4)3 at pH 8.5 reduced 82% of colour and 70% of COD. With the addition of Polyacrylamide (PAM), the reduction efficiencies of colour, COD and turbidity by FeSO4 – Al2(SO4)3 were 87%, 73.1% and 94.1% correspondingly. It was indicated that PAM significantly reduced the turbidity of wastewater, however it virtually did not increase the efficiencies of colour and COD reduction. Furthermore, the coagulation processes using PAM usually produces a mount of sludge which is hard to be deposited.

Native plants in urban landscapes: a biological imperative

2020 ◽  
Vol 21 (3) ◽  
pp. 275-280
Author(s):  
Richard Martinson
Keyword(s):  
Native Plants ◽  
Urban Landscapes
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