Remediation of sewage and industrial effluent using bacterially assisted floating treatment wetlands vegetated with Typha domingensis

2016 ◽  
Vol 74 (9) ◽  
pp. 2192-2201 ◽  
Author(s):  
Amna Ijaz ◽  
Zafar Iqbal ◽  
Muhammad Afzal
Keyword(s):  
Environmental Quality ◽  
Industrial Wastewater ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Sewage Water ◽  
Quality Parameters ◽  
Treatment Wetlands ◽  
Polluted Water ◽  
Typha Domingensis ◽  
Floating Treatment Wetlands

This investigation reports the quantitative assessment of endophyte-assisted floating treatment wetlands (FTWs) for the remediation of sewage and industrial wastewater. Typha domingensis was used to vegetate FTWs that were subsequently inoculated with a consortium of pollutant-degrading and plant growth-promoting endophytic bacteria. T. domingensis, being an aquatic species, holds excellent potential to remediate polluted water. Nonetheless, investigation conducted on Madhuana drain carrying industrial and sewage water from Faisalabad City revealed the percentage reduction in chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) to be 87% and 87.5%, respectively, within 96 h on coupling the plant species with a consortium of bacterial endophytes. With the endophytes surviving in plant tissue, maximal reduction was obtained in not only the aforementioned pollution parameters but for other major environmental quality parameters including nutrients (N and P), ions (Na+ and K+), Cl−, and SO42− as well, which showed percentage reductions up to 90%, 39%, 77%, 91.8%, 40%, and 60%, respectively. This significant improvement in polluted wastewater quality treated with the proposed method render it safe to be discharged freely in larger water bodies as per the National Environmental Quality Standards (NEQS) of Pakistan or to be reused safely for irrigation purposes; thus, FTWs provide a sustainable and affordable approach for in situ remediation of sewage and industrial wastewater.

scholarly journals Assessment study of water quality index (WQI) for Shatt Al-arab River and its branches, Iraq

2018 ◽  
Vol 162 ◽  
pp. 05005 ◽  
Author(s):  
Ahmed Hamdan ◽  
Ammar Dawood ◽  
Douaa Naeem
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Large Scale ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
River Pollution ◽  
Sewage Water ◽  
Quality Parameters ◽  
Pollution Level

Shatt Al-Arab River (in Basrah province South of Iraq) is approximately 192 km long. It plays a key role in providing water for domestic purposes, irrigation, manufacturing, in addition to shipment. Recently the river suffers from increasing pollution, due to wastes from industries, domestic sewage and agricultural activities that find their way into water sources and result in large scale deterioration of water quality. Investigating the river size and significance, becomes necessary to perform a study to understand the water quality of this river that is considered by some experts as one of the most contaminated in Iraq. This work uses the Water Quality Index (WQI) to describe the pollution level of the river and by using Geographic Information System (GIS) to create WQI map. This study also determines the critical pollutants affecting the river water quality throughout its course. WQI has been formulated making use of several water quality parameters such as pH, temperature, Dissolved Oxygen (DO), Biological Oxygen Demand（BOD5), Chemical Oxygen Demand（COD）, Nitrate (NO3-2), Phosphate (PO4-3), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Turbidity (Tur), and Electrical Conductivity (E.C) which were measured at 37 sites along the river. Bad water quality was observed at the sites of the river branches, near the center of Basrah governorate. Furthermore, it was discovered that the main reason for river pollution was due to the high sewage water discharged into the river, especially river branches and illegal discharges of industrial effluent and sewage.

Sources of Pollution of the Estuary of the River Nervion, Spain – A Case Study

1984 ◽  
Vol 16 (5-7) ◽  
pp. 95-125 ◽  
Author(s):  
A Azkona ◽  
S H Jenkins ◽  
H M G Roberts
Keyword(s):  
Fresh Water ◽  
Hydrogen Sulphide ◽  
Industrial Wastewater ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Domestic Sewage ◽  
Septic Tank ◽  
Safety Level ◽  
Sulphide Concentration

This paper describes part of a comprehensive multidisciplinary study of the pollution of the estuary of the River Nervion, Bilbao, Spain. The objectives of the study were to determine the sources and loads of pollution from domestic sewage and industrial wastewater; provide information on the extent of pollution; formulate hydrodynamic and predictive models capable of forecasting the effects on the estuary of the anticipated growth of population and industry; determine the amount of polluting matter that would have to be removed in order to reach defined estuary water quality standards; arrive at suitable technical methods able to attain these standards at minimum cost; determine the treatability of wastewater discharges and recommend methods for controlling industrial wastewater. These objectives necessitated a survey of the pollution loads from domestic sources and industry which were discharged to the fresh water and tidal reaches of four major tributaries in addition to the main river Nervion; the results of this part of the survey are described in this paper. The presence of iron in discharges from iron ore mining and metal processing was found to aid flocculation of organic matter and the consequent deposition of sludge in the estuary. This action and the rate of oxygen uptake during the decomposition of such deposits are also described. The domestic sewage of the study area receives treatment in septic tanks before discharging to rivers or the estuary. In spite of free hydrogen sulphide and high concentrations being present in the septic tank effluents, odour nuisance does not occur, because, as is shown in the paper, of the formation of ferrous sulphide. The hydrogen sulphide concentration in the atmosphere at a pumping station was found to be above the safety level. The industrial load of impurity was estimated to be approximately 15% higher than the domestic load, but it is extremly difficult to find a rational basis on which comparisons may be made between domestic sewage and a mixture of industrial effluents containing substances inimical to biological activity. The industrial effluent was contained in a very large volume of water, much of it taken from the estuary for cooling or process water. It is calculated that if the industrial pollutants had been contained only in the fresh water used by industry the COD of the mixture would have been 1317 mg/l; the suspended solids 2143 mg/l; the ammonia nitrogen 191 mg/l; iron 1037 mg/l; other heavy metals 118 mg/l; fluoride as F 14.5 mg/l; cyanide as CN 8.1 mg/l; oil 196 mg/l; phenols 8.1 mg/l; mercury 0.13 mg/l; and the mixture would have had an excess of acidity of 5188 mg/l. An estimate of the load of substances having an oxygen demand indicated that of the total oxygen demand discharged to the system of rivers and estuary approximately 50% entered the estuary from the main tributaries, the remainder being discharged directly to the estuary. An outline is given of the methods that would be used to determine the treatability of industrial effluents which were rendered acceptable for discharge into public sewers.

scholarly journals ENVIRONMENTAL QUALITY ON SURROUNDING COMMUNITY OF COAL MINING AREA IN SAMARINDA, EAST KALIMANTAN, INDONESIA

2019 ◽  
Vol 5 (4) ◽  
pp. 91-98
Author(s):  
Ike Anggraeni ◽  
Annisa Nurrachmawati ◽  
Riza Hayati Ifroh ◽  
Andi Anwar ◽  
Siswanto Siswanto
Keyword(s):  
Air Quality ◽  
Water Sample ◽  
Coal Mining ◽  
Environmental Quality ◽  
Normal Condition ◽  
Oxygen Demand ◽  
Mining Area ◽  
Quality Parameters ◽  
Coal Mining Area ◽  
The Impact

Background: The massive exploration of coal in Samarinda could lead to various environmental consequences, such as metal contamination of soil, toxic materials and sediments in rivers and air pollution. Scanning and exploring the impact of mining on environmental quality will strategic to develop and carry out rehabilitation on damaged ecosystems and as a preventive and adaptive action of the community in responding the threat of global environmental change.Objective: This paper mainly focused on determining environmental quality based on water and air quality parameters (sulfur dioxide/SO2, Nitrogen dioxide/NO2, Carbon monoxide CO and TSP/dust) also determining community perception about the environment.Methods: Water sample taken from Betapus river (upstream and downstream) and well. Air sample taken around residential in coal mining area. Household survey of 305 respondents conducted in five community neighborhoods in area that affected by mining activities. In general, the air quality parameters such as SO2, NO2, CO and TSP at normal condition.Result: The measurement result of wells water revealed that only the pH (power of hydrogen) at normal condition, while BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), Iron (Fe) exceed the threshold and almost all water sample exceeds the threshold in Manganese (Mn). The results of river quality in pH and COD showed that both in the upstream, midstream and downstream on normal condition, while Fe, COD exceeds the threshold. The BOD in the upper, middle parts of the river exceed the threshold.Conclusion: This study found that there had been anomaly in water environment compounds. These indicate that mining has led to the occurrence of water pollution. Therefore, needs reevaluation analysis of environmental impacts document of the mining companies in Bayur Village. It is also important to treating Mn and Fe of well or river water, especially if the water use for drinking.

scholarly journals Performance of chemically resistant polyurea reverse osmosis membrane in the treatment of highly alkaline industrial wastewater containing sodium aluminate

2020 ◽  
Vol 82 (11) ◽  
pp. 2259-2270
Author(s):  
Shaik Nazia ◽  
Sugali Chandra Sekhar ◽  
Veeriah Jegatheesan ◽  
Suresh K. Bhargava ◽  
Sundergopal Sridhar
Keyword(s):  
Reverse Osmosis ◽  
Industrial Wastewater ◽  
Interfacial Polymerization ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Sodium Aluminate ◽  
Water Recovery ◽  
Cross Sectional ◽  
Feed Composition ◽  
Ro Membrane

Abstract The goal of the present study is to treat industrial wastewater containing sodium aluminate using a chemically inert polyurea (PU) based thin film composite (TFC) reverse osmosis (RO) membrane to promote water reclamation and zero liquid discharge (ZLD). Pretreatment was carried out to reduce the pH of the effluent from 12.5 to 7.1. The TFC RO membrane was fabricated by coating PU on Polyethersulfone (PES) substrate by interfacial polymerization (IP). The surface and cross-sectional morphologies of the membrane were characterized using scanning electron microscopy (SEM). The indigenously synthesized membrane was effective in the removal of total dissolved solids (TDS), chemical oxygen demand (COD), colour and electrical conductivity. The experiments were conducted by varying the feed composition of the wastewater. The maximum water recovery and flux were found to be 74% and 73.9 L/m2·h. RO process using PU membrane exhibited significant potential for cost effective, safe and pollution-free treatment of sodium aluminate industrial effluent.

scholarly journals Effluent Treatment Technologies and Cost Research

2019 ◽  
Vol 9 (1) ◽  
pp. 6752-6757
Keyword(s):  
Industrial Wastewater ◽  
Microbial Growth ◽  
Suspended Solids ◽  
Batch Reactor ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Effluent Treatment ◽  
Treatment Technologies ◽  
The Common

The Common Effluent Treatment Plants (CETP) minimizes the pollution from industrial effluents. This plant monitors the reduction of physical and biochemical parameters such as total suspended solids (TSS), biological oxygen demand (BOD), chemical oxygen demand (COD), dissolved oxygen (DO), heavy metals etc. The Sequential Batch Reactor (SBR), a variation of the ASP, combines all the treatment steps and processes into a single basin. An improved SBR process is Attached Growth Batch Reactor (AGBR) technology that provisions for microbial growth on the settled media/bed to treat the industrial wastewater using enzymes. This technology, when used to treat polluted river water, achieved about 90% of reduction of wastewater parameters. Hence the same is envisioned for the treatment of industrial effluent. In all the above methods the sludge settlement occurs. It contains biodegradable carbon content which could be used as feed for Biogas Digesters to produce Methane. The present study aims at examining the benefits of combining AGBR and Biogas Digester to implement the 3Rs (Reduce, Recycle, Reuse) [1]

Remediation of polluted river water by floating treatment wetlands

2018 ◽  
Vol 19 (3) ◽  
pp. 967-977 ◽  
Author(s):  
Munazzam Jawad Shahid ◽  
Razia Tahseen ◽  
Muhammad Siddique ◽  
Shafaqat Ali ◽  
Samina Iqbal ◽  
...  
Keyword(s):  
River Water ◽  
Oxygen Demand ◽  
Treatment Wetlands ◽  
Bacterial Strains ◽  
Aquatic Life ◽  
Polluted River ◽  
Leptochloa Fusca ◽  
Quality Guidelines ◽  
Floating Treatment Wetlands ◽  
Better Than

Abstract In this study, the potential of floating treatment wetlands (FTWs), inoculated with selected bacteria, to ameliorate polluted river water was evaluated. Floating cells were prepared by vegetating plants, Typha domingensis and Leptochloa fusca, on a floating mat. The plants were inoculated with three different pollutant-degrading rhizospheric and endophytic bacterial strains. Significantly greater decrease in chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC) was observed in inoculated FTWs than in the wetlands without bacterial inoculation. However, a slight decrease in pH and EC was seen in most of the treatments. The total nitrogen (TN), nitrate and total phosphorus (TP) contents decreased to 1.77 mg/L, 0.80 mg/L and 0.60 mg/L, respectively. Additionally, the concentration of iron (Fe), nickel (Ni), manganese (Mn), lead (Pb), and chromium (Cr) in the water lowered to 0.41, 0.16, 0.10, 0.25, and 0.08 mg/L, respectively. Overall the performance of T. domingensis was significantly better than L. fusca. The treated effluents meet the water quality guidelines for irrigation and aquatic life. This study revealed that FTWs supplemented with selective bacteria are a promising approach for the restoration and management of polluted river water.

scholarly journals IMPORTANCE OF OXYGEN REGIME INDICATORS – CASE STUDY OF THE NIŠAVA RIVER IN SERBIA

2018 ◽  
pp. 181
Author(s):  
Žarko Vranjanac ◽  
Dejan Vasović
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Environmental Protection ◽  
Environmental Quality ◽  
Oxygen Demand ◽  
Environmental Indicators ◽  
Global Perspective ◽  
Polluted Water ◽  
Sustainable Water Management ◽  
Oxygen Regime

From a global perspective, there is currently an ever-increasing problem of natural water resource pollution and daily decrease of available amounts of potable water. In addition to the definition of their ecological status, the existing problems of polluted water systems also require that parameters of the oxygen regime should be determined. The importance of monitoring the indicators of oxygen regime in rivers is aimed at achieving sustainable water management and preserving environmental quality. Oxygen regime in the Nišava river ecosystem is monitored based on specific physico-chemical indicators: biological oxygen demand (BOD), chemical oxygen demand (COD), total organic carbon (TOC), dissolved oxygen and oxygen saturation. The aim of this paper is to demonstrate the significance of oxygen regime indicators by monitoring their concentrations at measuring stations along the Nišava, which can help assess the quality of the given aquatic ecosystem. The paper relies on the Results of Surface and Ground Water Quality Testing by the Environmental Protection Agency, Ministry of Agriculture and Environmental Protection of the Republic of Serbia for two measuring stations along the Nišava in 2013. Mean annual concentrations of oxygen regime indicators for 2013 are BOD = 2.6 mg/L and COD = 4.3 mg/L, which indicates that the value of their respective ratio is 0.6, which is important for oxygen regime. A comparative analysis performed by the water supply PUC “Naissus”, based on the values of these environmental indicators, also confirmed that water quality in the Nišava corresponds to Class II surface water. Therefore, this paper highlights the importance of monitoring oxygen regime indicators of the Nišava River for the purpose of sustainable water management and environmental quality preservation.

scholarly journals Neutralization of sludge and purification of wastewater from Sindos industrial area of Thessaloniki (Greece) using natural zeolite

2017 ◽  
Vol 47 (2) ◽  
pp. 920 ◽  
Author(s):  
A. Filippidis ◽  
A. Godelitsas ◽  
N. Kantiranis ◽  
P. Gamaletsos ◽  
E. Tzamos ◽  
...  
Keyword(s):  
Natural Zeolite ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Industrial Area ◽  
Quality Parameters ◽  
Clear Water ◽  
High Quality ◽  
Type Zeolite ◽  
Zeolite Tuff

The commixture of sludge from Sindos industrial area of Thessaloniki with high quality HEU-type natural zeolite (tuff with 86 wt.% clinoptilolite-heulandite) in equal proportions, resulted in odourless and cohesive zeosludge. Also, the treatment of wastewater of pH 7.8 from the same area with high quality HEU-type natural zeolite (88 wt.% clinoptilolite-heulandite) resulted in production of clear water of pH 7.3, free of odours and improved quality parameters by 60% for the NO3 - content, 76% for the chemical oxygen demand (COD), 100% for P2O5 and Cr contents. Simultaneously, a precipitate of odourless and cohesive zeosludge was produced. The odourless and cohesive zeosludge produced either by the commixture of sludge with the natural zeolite or as precipitate from the treatment of industrial wastewater with the natural zeolite and coagulants, is suitable for safe deposition, since the fixation of the hazardous components in the micro/nano-pores of the HEU-type zeolite, as well as the meso- and macro-porous of natural zeolite, prevents their leaching by the rain water, protecting thus the quality of soils, surface and ground waters.

Removal of Copper (II) Ion: Effect of Polysulfone Support Thickness

2019 ◽  
Vol 797 ◽  
pp. 29-38
Author(s):  
Norin Zamiah Kassim Shaari ◽  
Nurul Aida Sulaiman ◽  
Soraya Nanis Hamdan
Keyword(s):  
Thin Layer ◽  
Environmental Quality ◽  
Composite Membrane ◽  
Industrial Wastewater ◽  
Industrial Effluent ◽  
Copper Ion ◽  
Hybrid Membrane ◽  
Wastewater Sample ◽  
Polysulfone Membrane ◽  
Pre Treatment

This study was conducted to characterize the industrial wastewater containing Copper (II) ion and to evaluate the effect of different thickness of polysulfone as the support membrane in the fabrication of thin film composite membrane (TFC), on the removal of Copper (II) ion. From the wastewater analysis, it showed that the concentration of copper (II) ion are out of the acceptable range of Environmental Quality (Industrial Effluent) Regulations 2009. For the TFC, the polysulfone support membrane was prepared at two thicknesses, 60μm and 90μm. For each thickness, two formulations of thin layer were coated on it; i) A polymer blend of Polyvinyl Alcohol and Chitosan, and ii) Hybrid membrane as thin layer. Before undergo the treatment process, the pH of the wastewater sample was altered to 7 as the pre-treatment. The final result shows that composite membrane with hybrid membrane as thin layer with 90μm thickness of polysulfone membrane was the best membrane because it could remove 99.67% of copper (II) ion. Finally, the treated water can be discharged to the groundwater because the concentration of copper ion is less than 1 ppm, which it has fulfilled the Environmental Quality regulations. Keywords— Chitosan, Copper ion, composite membrane, hybrid membrane, industrial wastewater

scholarly journals Constructed Floating treatment wetlands: can they improve water quality in a northern USA climate?

2021 ◽  
Vol 5 (6) ◽  
pp. 317-325
Author(s):  
Mattias Oddsson ◽  
Emily Deering ◽  
Ren Ortega ◽  
Joe Magner
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Management Practice ◽  
Quality Parameters ◽  
Treatment Wetlands ◽  
Limiting Factor ◽  
Spatial Coverage ◽  
Improve Water Quality ◽  
Study Sites ◽  
Floating Treatment Wetlands

Constructed floating treatment wetlands (FTWs) are a best management practice (BMP) applied in aquatic environments to improve water quality by mitigating nutrient pollution. We evaluated the efficacy of FTWs in Minnesota, USA as a tool for the removal of excess nutrients in surface water to enhance water quality. We began with a 2015 outdoor mesocosm study to quantify the removal efficiency of total phosphorus (TP), ortho-phosphate-P (PO4-P), nitrate-N, and ammonia-N. The FTWs were each planted with wetland plants Juncus effusus, Eleocharis acicularis, and Glyceria canadensis. A paired controlled TP budget was prepared to identify mesocosm sources and sinks. Mesocosm FTWs showed higher PO4-P reduction efficiencies than the control mesocosms. Mesocosms with FTWs had significantly lower pH and dissolved oxygen (DO) concentrations. Water quality measurements were made along with qualitative observations, such as durability, at two different field scales where FTWs were installed in a pond and lake in 2016. Field deployed FTWs showed measurable changes in several water quality parameters over the study period. Statistically significant reductions were observed in PO4-P, DO, and pH for the pond site but not at the lake site. Though positive results were observed, factors other than FTWs may better explain the field deployed FTW results. Overall, the high FTW spatial coverage (15%) in the mesocosms showed clear PO4-P removal, whereas low FTW spatial coverage (<1%) of the field scale surface water was likely the most limiting factor to achieving optimal water quality at the study sites and rather than individual FTW performance.

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