Area-based speciation kinetic analysis of the multipollutant removal in Constructed Wetlands to enhance its treatment efficiency

2021 ◽  
Author(s):  
Manoj Kumar ◽  
Rajesh Singh
Keyword(s):  
Wastewater Treatment ◽  
Kinetic Analysis ◽  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Zero Order ◽  
Pollutant Removal ◽  
Municipal Wastewater Treatment ◽  
Treatment Efficiency ◽  
First Order ◽  
Present Study Area

In the present study area-based, pollutant removal kinetic analysis was considered using the Zero-order, first-order decay and efficiency loss (EL) models in the constructed wetlands (CWs) for municipal wastewater treatment....

Treatment of the Domestic Sewage by the Lab-Scale Sub-Surface Horizontal-Flow Wetland

2011 ◽  
Vol 374-377 ◽  
pp. 1036-1039 ◽  
Author(s):  
Meng Lin ◽  
Yun Han
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Primary Standard ◽  
Treatment Plant ◽  
Shaanxi Province ◽  
Horizontal Flow ◽  
Municipal Wastewater Treatment ◽  
Isotherm Equation

Abstract：The constructed wetland is a new kind of wastewater treatment developing in recent years, which is very suitable for the regional characteristics of Shaanxi province. The design of the constructed wetlands is developed from the traditional sub-surface horizontal-flow wetlands (SSHFW). Two groups of wetlands were designed in parallel, and each single wetland can also became the vertical-flow wetland system. Aerating in front of the constructed wetlands is to study the removal efficiency of the organics. Test indicators contain SS、COD、Nitrogen、Phosphor and the rate of nitrification and de-nitrification. According to the experiments of the self-designed SSHFW, the removal efficiency of the SS, COD, NH4+-N、TN and TP were 92%, 82%, 40%, 46.2% and 70% respectively. The strength of nitrification and de-nitrification of the packing reached to 0.35mg/(kg.h) and 3.32mg/(kg.h). On the basis of the Langmuir adsorption isotherm equation, the adsorption quantity of coarse sand and gravel were 405.2mg/kg and 498.6mg/kg. The quality of the effluent met the primary standard of B-standard in the discharge standards of pollutants for municipal wastewater treatment plant (GB18918-2002).

scholarly journals Sewage Flow Conditions in a Hydroponic Lagoon in Terms of Quality of Treated Wastewater

2021 ◽  
Vol 232 (7) ◽  
Author(s):  
K. Marek ◽  
K. Pawęska ◽  
A. Bawiec ◽  
J. Baran
Keyword(s):  
Wastewater Treatment ◽  
Cross Sections ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Pollutant Removal ◽  
Treated Wastewater ◽  
Municipal Wastewater Treatment ◽  
Flow Conditions ◽  
Wastewater Samples ◽  
The Impact

AbstractThe aim of this study was to analyse the impact of velocity in the hydroponic lagoon used as the 3rd stage of municipal wastewater treatment on washing out of the particles suspended in the sewage as well as settled on the bottom of the hydroponic ditch. In order to analyse the flow velocity in the lagoon, 12 cross-sections were determined at points where the speed and motion of particles can change. Wastewater samples were taken in the summer month from each of the 12 sampling points (the depth of 0.1 m) and the basic physicochemical parameters of sewage were determined (BOD5, COD, TOC, TSS, turbidity). In selected cross-sections, a granulometric analysis of particles was made to determine the characteristics of suspended solids in the wastewater flow path. Based on the analysis, it was found that velocities in the lagoon during aeration can be ten times higher (0.070 m·s−1) than those assumed by designers (0.006 m·s−1). Such a large difference means that the sedimentation conditions assumed in the project cannot be met, which may result in an increase in the total suspended solids and organic matter concentrations at the outflow to the receiving water body. During the flow through the hydroponic ditch, the highest efficiency of pollutant removal was indicated for BOD5 — 88.7% and TSS — 80%, while the COD removal occurred with the lowest efficiency — 34.1%. Improving flow conditions as designed in the hydroponic lagoon technological project may increase the efficiency of wastewater treatment at the third stage of treatment.

A concept for planning and management of on-site and centralised municipal wastewater treatment systems, a case study in Bangkok, Thailand. I: Pollutant discharge indicators and pollutant removal efficiency functions

2013 ◽  
Vol 67 (9) ◽  
pp. 1923-1933 ◽  
Author(s):  
Yoshiaki Tsuzuki ◽  
Thammarat Koottatep ◽  
Thitiphon Sinsupan ◽  
Supattra Jiawkok ◽  
Chira Wongburana ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Oxygen Demand ◽  
Pollutant Removal ◽  
Municipal Wastewater Treatment ◽  
Planning And Management ◽  
Pollutant Discharge ◽  
Wastewater Treatment Systems ◽  
Pollutant Removal Efficiency

The concept of pollution load indicators for planning and management of the mixture conditions of centralised and on-site wastewater treatment systems has not been discussed in detail so far. In this paper, pollutant discharge (load) indicators and pollutant removal efficiencies were quantitatively analysed to develop a part of a strategy for planning and management of municipal wastewater treatment systems (WWTSs) under the mixture conditions in Bangkok, Thailand, as a case study. Pollutant discharge indicators of on-site WWTSs were estimated based on the relevant literature. Three kinds of pollutant removal efficiency function at centralised wastewater treatment plants (CWWTPs) were empirically developed for biological oxygen demand, chemical oxygen demand, total nitrogen, total phosphorus, total coliforms and faecal coliforms based on the existing CWWTP management data. These results will be integrated into the scenario-based analysis in the second paper in the series. The results will be base datasets, and the concept and estimation methods can be applied for wastewater treatment planning and management in other areas.

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