scholarly journals Innovations in the design of sewage treatment plants-A review

2020 ◽  
Author(s):  
Fatema Abdullah Said Al Maawali ◽  
Ryan Said Abdullah Saif Al-Sheidi ◽  
Mayasah Saud Nasser Al Risi ◽  
Fatema Ali Muhammed Al Balushi ◽  
Binumol Shahulhameed
Keyword(s):  
Waste Water ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Environmental Issues ◽  
Sustainable Utilization ◽  
Issues Management ◽  
Waste Products ◽  
Safe Environment ◽  
Innovative Methods ◽  
Planning And Design

Rapid growth in the population and development of cities led to the increase in the quantity of waste water which in turn causes critical environmental issues. Management of wastewater and sludge will affect economic growth of any nation and challenges associated led to the research in this field. Innovative methods for sewage treatment were developed in many countries to solve the problems arising as a result of enormous production in waste water and sludge. Different approaches and techniques were evolved as a result of the studies conducted in order to attain a unique solution for maintaining a safe environment. The main aim of this paper is to provide details regarding the various researches in planning and design of sewerage systems in Oman. Various regulations in the treatment of waste water and sludge as well as policies adopted for the management are discussed in detail.  Based on the discussions and related review, it is clear that over decades the sewage treatment is considered to be a major issue in Oman. Further, applications related to the better utilization of the wastewater and the sludge in agriculture and other related fields are in progress in various parts of Oman. Research projects were ongoing in different universities of Oman on the sustainable utilization of the waste products and innovative methods to be adopted in the sewage treatment process.

Waste Water Treatment Process and its Effect Analysis of Shagou Mine in Luoning County, Henan Province

2013 ◽  
Vol 726-731 ◽  
pp. 2609-2613
Author(s):  
Li Yang Li ◽  
Chen Feng ◽  
Dao Fang Liu ◽  
Yuan Cao
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Henan Province ◽  
Wastewater Discharge ◽  
Effect Analysis ◽  
Water Treatment Process ◽  
Before And After

Based on the systematically describing of the producing and living waste water treatment process in Faende Mining Co.,Ltd.,in Shagou, Luoning, Henan Province, the production and living waste water treatment effect was analyzed deeply. The comparing results of before and after treatment showed that the design of the treatment process in the mine was reasonable, the sewage treatment worked well, and the effluent concentration of has reached the first class of "integrated Wastewater Discharge Standard" (GB8978-1996), among which the concentration of the two indexes, Lead and Zinc, has achieved the specific standard which is more strict than the first class of "integrated Wastewater Discharge Standard" (GB8978-1996).

Study on Sewage Treatment Process in Stone Production

2014 ◽  
Vol 989-994 ◽  
pp. 1309-1312
Author(s):  
Min Zhao ◽  
Wei Wei Guo ◽  
Qiang Xiao ◽  
Jing Zhang
Keyword(s):  
Waste Water ◽  
Water Resources ◽  
Production Process ◽  
Theoretical Basis ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Wastewater Reuse ◽  
Traditional Treatment ◽  
High Turbidity ◽  
Stone Cutting

In the process of stone cutting and polishing, a large amount of high turbidity water is produced, which causes the waste of water resources and the pollution of the environment. The traditional treatment process is optimized, taking problems occurred in sewage treatment process by small and medium-sized enterprises and the existing technology and method into consideration. According to the production process of stone, the amount of waste water generated every day is calculated, which provides a theoretical basis for the sedimentation tank optimization and design. The necessity of stone wastewater reuse is illustrated.

Sewage Treatment in Helophyte Beds–First Experiences with a New Treatment Procedure

1987 ◽  
Vol 19 (10) ◽  
pp. 1-10 ◽  
Author(s):  
K. Bucksteeg
Keyword(s):  
Waste Water ◽  
Rural Areas ◽  
Root Zone ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Uptake Capacity ◽  
Humid Climate ◽  
Climate Conditions ◽  
Trickling Filters ◽  
Operation Conditions

Waste water treatment in helophyte beds under humid climate conditions has been favoured by some German ecologists for some years. The idea is to cause waste water to flow horizontally through the root zone of helophytes to achieve satisfactory effluent properties. There exist many highly different proposals regarding the choice of soil and helophytes to be applied, bed area, design of inlets and outlets and operation conditions. A few plants have been operated in practice for some years. It appears that clogging is one of the main problems occurring in these plants. The hydraulic uptake capacity of soil is discussed in Darcy's law. Comparisons with observations of plants in operation are drawn. The interactions between soil properties, its uptake capacity, BOD5-, COD-, N- and P-reduction are evaluated. The effluent results of helophyte beds are compared with those of low-loaded trickling filters and of ponds used for sewage treatment in small villages in rural areas of Germany. It has been proved that the total construction costs of sewage treatment plants with helophyte beds used as the biological stage are higher when compared with those of conventional plants in general.

scholarly journals Mercury speciation transformation in sewage of the sewage treatment process

2021 ◽  
Vol 770 (1) ◽  
pp. 012069
Author(s):  
Yunpeng Li ◽  
Yan Wang ◽  
Ruhai Liu ◽  
Long Shao ◽  
Xiaoyu Liu ◽  
...  
Keyword(s):  
Treatment Process ◽  
Sewage Treatment ◽  
Mercury Speciation

Occurrence and elimination of antibiotics at four sewage treatment plants in Japan and their effects on bacterial ammonia oxidation

2009 ◽  
Vol 59 (4) ◽  
pp. 779-786 ◽  
Author(s):  
Gopal Chandra Ghosh ◽  
Takashi Okuda ◽  
Naoyuki Yamashita ◽  
Hiroaki Tanaka
Keyword(s):  
Oxygen Uptake ◽  
Nalidixic Acid ◽  
Removal Efficiency ◽  
Treatment Process ◽  
Ammonia Oxidation ◽  
Oxygen Uptake Rate ◽  
Sewage Treatment ◽  
Secondary Treatment ◽  
Mixed Condition ◽  
Sewage Treatment Plants

The occurrence and elimination of seventeen antibiotics (three macrolides: azithromycin, clarithromycin and roxithromycin; five quinolones: ciprofloxacin, enrofloxacin, levofloxacin, nalidixic acid and norfloxacin; five sulfonamides: sulfadimethoxine, sulfadimizine, sulfamerazine, sulfamethoxazole and sulfamonomethoxine; and others: tetracycline, lincomycin, salinomycin and trimethoprim) were investigated at four full-scale sewage treatment plants in Japan. The highest concentration was recorded for clarithromycin (1,129 to 4,820 ng/L) in influent, followed by azithromycin (160 to 1,347 ng/L), levofloxacin (255 to 587 ng/L) and norfloxacin (155 to 486 ng/L). A vary inconsistence picture was obtained with negative to over 90% removal. Nalidixic acid (53 to100%) exhibited higher removal efficiency followed by norfloxacin (75 to 95%), levofloxacin (40 to 90%), ciprofloxacin (60 to 83%) and enrofloxacin (38 to 74%). Among macrolides, clarithromycin (50 to 88%) and azithromycin (34 to 86%) showed relatively higher removal efficiency than roxithromycin (−32 to 59%). For most of the antibiotics removal efficiency was higher in A2O and AO based secondary treatment process than CAS process. The effect of the antibiotics on bacterial ammonia oxidation determined by oxygen uptake rate presented that there was no significant effect below 0.05 mg/L of each antibiotics. Even at the same concentration, antibiotics in mixed condition had higher inhibition effects than individuals.

Water reuse for irrigation from waste water treatment plants with seasonal varied operation modes

2004 ◽  
Vol 50 (2) ◽  
pp. 47-53 ◽  
Author(s):  
P. Cornel ◽  
B. Weber
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Treated Wastewater ◽  
Nitrifying Bacteria ◽  
Water Treatment Plants ◽  
Operation Modes ◽  
Waste Water Treatment Plants

Irrigation periods are usually limited to vegetation periods. The quality requirements for treated wastewater for disposal and for reuse are different. The reuse of water for irrigation allows partly the reuse of the wastewater's nutrients (N and P). Outside the irrigation period the water must be treated for disposal, thus nutrient removal is often required in order to avoid detrimental effects on the receiving surface water body. Only wastewater treatment plants with different operation modes for different seasons can realise these requirements. The nitrification is the most sensitive biological process in the aerobic wastewater treatment process. At low water temperatures the nitrifying bacteria need several weeks to re-start full nitrification after periods without NH4-removal. Therefore it is necessary to develop options for waste water treatment plants which allow a fast re-start of the nitrification process. Based on theoretical considerations and computer simulations of the activated sludge treatment process, one possibility for implementing a wastewater treatment plant with different seasonal operation modes is evaluated.

Anaerobic-Aerobic Combined Process for the Treatment of Sewage with Nutrient Removal: The Ananox® Process

1992 ◽  
Vol 25 (7) ◽  
pp. 383-394 ◽  
Author(s):  
G. Garuti ◽  
M. Dohanyos ◽  
A. Tilche
Keyword(s):  
Organic Matter ◽  
Nutrient Removal ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Warm Season ◽  
Combined Process ◽  
Water Treatment Process ◽  
A Value ◽  
N Removal

Results of a three year experience on a combined anaerobic-anoxic-oxic municipal waste water treatment process - named ANANOX® - are presented. This process demonstrated to be highly efficient, with 89.6% CODt, 89.2% TSS and 81.2% N removal, and a sludge production of only 0.2 kg TSS.kg COD removed−1, a value which is roughly 50% less if compared with traditional nitrification/denitrification processes. Sulphates play a very significant role in the process because, after being reduced in the anaerobic step, where they give a contribution to the organic matter degradation, they are reoxidized in the anoxic step by nitrates, reducing the organic matter need for denitrification. Due to the high dependence of efficiency on temperature, the system proposed has advantageous uses for sewage treatment, particularly in warm climates and in tourist and recreational areas where the population increases during the warm season.

A Study of the Behaviour of a Single-Bladed Waste-Water Pump

2006 ◽  
Vol 220 (2) ◽  
pp. 79-87 ◽  
Author(s):  
J Keays ◽  
C Meskell
Keyword(s):  
Waste Water ◽  
Power Consumption ◽  
Turbulence Model ◽  
Numerical Models ◽  
Sewage Treatment ◽  
Computational Cost ◽  
Primary Source ◽  
Pressure Head ◽  
Primary Objective ◽  
Pump Efficiency

A single-vaned centrifugal pump, typical of the kind employed in waste-water applications (e.g. sewage treatment), has been investigated numerically. The primary objective was to identify a modelling approach that was accurate, but at an acceptable computational cost. A test program has been executed to provide data to validate the numerical models. The global performance of the pump was assessed in terms of the pressure head, the mass flowrate, the power consumption, and the pump efficiency. In addition, time-resolved surface-pressure measurements were made at the volute wall. Five combinations of three modelling approximations (two or 3D; k-ε or Reynolds stress model turbulence model; unsteady or quasi-steady) were investigated and compared with the experimental results. It was found that the choice of turbulence model did not have a significant effect on the predictions. In all cases, the head-discharge curve was well predicted. However, it was found that only the quasi-steady models could capture the trend of the power consumption curve, and hence that of the efficiency. Discrepancies in the magnitude of the power consumption can be accounted for by the lack of losses such as leakage in the numerical models. Qualitative analysis of the numerical results identifies the trailing edge of the impeller as the primary source of power loss, with the flow in the region of the cut water also contributing significantly to the poor overall efficiency of the design.

scholarly journals Biosolids conditioning and the availability of Cu and Zn for rice

2003 ◽  
Vol 60 (1) ◽  
pp. 161-166 ◽  
Author(s):  
Adriana Marlene Moreno Pires ◽  
Maria Emília Mattiazzo
Keyword(s):  
Treatment Process ◽  
Oryza Sativa L ◽  
Sewage Treatment ◽  
Statistical Design ◽  
Test Plant ◽  
Before And After ◽  
Year 2000 ◽  
Zn Availability ◽  
Cu And Zn ◽  
Metal Phytoavailability

Sewage treatment process is a factor to be considered for biosolid use in agriculture. The greatest sewage treatment facility of São Paulo State (Barueri/SP) altered in the year 2000 of its sludge treatment. The addition of ferric chloride and calcium oxide was substituted by the addition of polymers. This change can modify heavy metal phytoavailability. A green house experiment, using 2 soils treated with biosolids (three with and one without polymers with and without polymers) was performed to evaluate Cu and Zn phytoavailability using rice (Oryza sativa L.) as test plant. Three kilograms of two soils (Haphorthox abd Hapludox) were placed in pots and the equivalent to 50 Mg ha-1 (dry basis) of biosolid was added and incorporated. The statistical design adopted was completely randomized experiment, with five treatments (control plus four different biossolids) each soil and four replications. Soil pH before and after harvesting, Cu and Zn concentrations in shoot were evaluated. Tukey (5%) was used to compare the results. DTPA, HCl 0.1 mol L-1 and Mehlich 3 were used to estimate soil available Cu and Zn. Amounts extracted were correlated to those presented in rice shoot, to evaluate the efficiency of predicting Cu and Zn phytoavailabilities. Biosolids with polymers presented higher Cu and Zn phytoavailabilities, possibly due to the lower pH of these residues. In this case soil presented lowest values of pH and plant shoot had highest. All extractants were representative of Cu and Zn availability to rice plants.

scholarly journals Unravelling diversity and metabolic potential of microbial consortia at each stage of leather sewage treatment

RSC Advances ◽  
2017 ◽  
Vol 7 (66) ◽  
pp. 41727-41737 ◽  
Author(s):  
Hebin Liang ◽  
Dongdong Ye ◽  
Lixin Luo
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Microbial Consortia ◽  
Biological Wastewater Treatment ◽  
Metabolic Potential ◽  
Ecological Functions ◽  
Wastewater Treatment Process ◽  
System P

Activated sludge is essential for the biological wastewater treatment process and the identification of active microbes enlarges awareness of their ecological functions in this system.

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