Use of Anaerobic Digestion Effluent and Secondary Treated Sewage Plant Discharge for Algal Cultivation and Prevention of Algal Pond Crash

2020 ◽  
Vol 53 (4) ◽  
pp. 177-182 ◽  
Author(s):  
Satoshi Nakai ◽  
Nur Indradewi Oktavitri ◽  
Nobuhiro Itamura ◽  
Tetsuji Okuda ◽  
Wataru Nishijima ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Plant ◽  
Treated Sewage ◽  
Algal Cultivation

Effect of anaerobic digestion at 35, 55 and 60 °C on pharmaceuticals and organic contaminants

2014 ◽  
Vol 69 (6) ◽  
pp. 1282-1288 ◽  
Author(s):  
Å. Davidsson ◽  
H. Kjerstadius ◽  
S. Haghighatafshar ◽  
J. Fick ◽  
M. Olsson ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Organic Contaminants ◽  
Wastewater Treatment Plants ◽  
Pharmaceutical Compounds ◽  
Commercial Fertilizer ◽  
Low Concentrations ◽  
Treated Sewage ◽  
Polycyclic Aromatic ◽  
Individual Pahs

The application of treated sewage sludge on farmland is a suggested method for recycling nutrients and reducing demand for commercial fertilizer. However, sludge needs to be safe from possible contaminants which can cause acute and long-term health and environmental problems. Residual pharmaceuticals and organic contaminants are mentioned as emerging threats since wastewater treatment plants are not designed to degrade these substances. The aim of this study was to screen and evaluate the presence, and reduction, of pharmaceuticals and polycyclic aromatic hydrocarbons (PAHs) during anaerobic digestion of mixed primary and waste-activated sludge at 35, 55 and 60 °C and during pasteurization at 70 °C. The study showed the difficulty of analysing pharmaceutical compounds in low concentrations in the sludge matrix. No general reduction of these compounds was seen during treatment, but for individual substances some reduction occured. The PAHs were generally not reduced during digestion or pasteurization, but for three substances (indeno[1,2,3-cd]pyrene and dibenzo[a,h]anthracene (analysed together) and benzo[g,h,i]perylene) reduction (up to 60%) during digestion was seen. Digestion at 35 and 55 °C resulted in about the same order of reduction of the three individual PAHs, which was higher than for digestion at 60 °C.

scholarly journals Effect of treated sewage effluents on plant cover and soil at Wadi Al Rummah, Qassim Region, Saudi Arabia

2017 ◽  
Vol 12 (No. 4) ◽  
pp. 246-253
Author(s):  
G.E.B. El Ghazali ◽  
A.R.A. Al-Soqeer ◽  
W.E. Abdalla
Keyword(s):  
Surface Soil ◽  
Plant Cover ◽  
Chemical Properties ◽  
Control Site ◽  
Species Dominance ◽  
Sewage Plant ◽  
Sewage Effluents ◽  
Physico Chemical ◽  
Treated Sewage ◽  
Before And After

The effect of tertiary treated sewage effluents on the plant cover and the physico-chemical properties of the surface soil (environmental characteristics) before and after the Al Rass sewage plant was investigated. The data were illustrated via TWINSPAN and canonical correspondence analysis (CCA). Five sites, 1 km apart, after the discharge point and one site (control site) before the sewage plant were examined. Eleven vegetation characteristics and ten physico-chemical properties of surface soil were studied. The obtained results revealed that discharging of treated sewage effluents altered quantitatively and qualitatively the pattern of species dominance and the physico-chemical properties of the soil. Soil electrical conductivity (EC), total dissolved solids (TDS), organic matters (OM), soluble cations, and soluble anions showed increased values compared to the control (resulting in salination), whereas soil pH decreased as a result of sewage disposal. It was also noticed that the physico-chemical values of EC, TDS, Ca<sup>++</sup>, Mg<sup>++</sup>, Na<sup>+</sup>, Cl<sup>–</sup> after the sewage plant were higher than the permissible limits for agriculture recommended by FAO, whereas K<sup>+</sup> and HCO<sub>3</sub><sup>–</sup> were within the recommended values. The dominance of Suaeda vermiculata Forssk. ex J.F.Jmel. after the sewage plant and its absolute absence before the sewage plant may be used as an environmental bioindicator of pollution.

Effect of treated sewage effluents on heavy metals contents of three dominant wild plants at Wadi Al Rummah, Qassim Region, Saudi Arabia

2016 ◽  
Vol 6 (2) ◽  
pp. 51-58
Author(s):  
Gamal E.B. El Ghazali ◽  
Abdulrahman Alsoqeer ◽  
Wail E. Abdalla
Keyword(s):  
Plant Species ◽  
Wild Plants ◽  
High Accumulation ◽  
Aerial Parts ◽  
Sewage Plant ◽  
Fe Content ◽  
Treated Sewage ◽  
Metal Contents ◽  
Before And After ◽  
Mn Concentration

A total of 132 plant samples from the aerial and underground parts of Halox-ylon salicornicum, Pulicaria undulata and Suaeda vermiculata, collected from Wadi Al Rummah, before and after Al Rass sewage Plant, were examined to assess their heavy metal contents. The results revealed highest Fe content and lowest Cd concentration in the three plant species examined. The aver-age metal concentration pattern in the aerial parts were: Fe> Mn> Zn> Cr> Cu> Ni> Pb> Cd. The concentrations of these eight elements in the aerial and underground parts were species dependant, but Mn was found to be pre-dominantly highly accumulated in the aerial parts, whereas Cu had the ten-dency to accumulate in the underground parts. The three plant species stud-ied, showed a decrease in Mn concentration and increased values in Zn, Cu, Fe, and Cr both in the aerial and underground parts after the Sewage Plant compared to their concentrations before the Sewage Plant (control.). The high accumulation of Cr in the plants examined (compared to typical concen-trations, suggested that the wild plants of the area should be used with cau-tion to feed livestock. The results also showed that P. undulata had the high-est accumulation of Zn, Cu, Ni, Fe, Mn and Cr, whereas the underground parts of H. salicornicum showed highest values for Pb and Cd.

Potential for Generation of Electrical Energy from Biogas Produced in the Anaerobic Treatment of Sewage Through Different Methodologies

2021 ◽  
Vol 47 (3) ◽  
pp. 579-589
Author(s):  
Laura Dardot Campello ◽  
Regina Mambeli Barros ◽  
Geraldo Lúcio Tiago Filho ◽  
Ivan Felipe Silva dos Santos
Keyword(s):  
Power Generation ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Local Authority ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Electrical Energy ◽  
Anaerobic Treatment ◽  
Treated Sewage ◽  
Order Of Magnitude

This study aimed to evaluate the potential for electricity generating of biogas from anaerobic digestion of sewage and sewage sludge in Wastewater Treatment Plants (WWTPs) in the state of Minas Gerais, Brazil. Four different methodologies for determining the volume of biogas produced were considered. Estimates of biogas production used actual data of the volume of treated sewage and population reached by this WWTP with sewage as presented in a report by the local authority. The results indicate some discrepancies between the methodologies employed, but in general, they all suggest a potential of electric power generation at the same order of magnitude. The most divergent results were those in which the methodologies were applied to municipalities with a population of over 250,000 inhabitants.

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