scholarly journals Performance comparison of plant root biofilm, gravel attached biofilm and planktonic microbial populations, in phenol removal within a constructed wetland wastewater treatment system

Water SA ◽  
2016 ◽  
Vol 42 (1) ◽  
pp. 166 ◽  
Author(s):  
Eyal Kurzbaum ◽  
Felix Kirzhner ◽  
Robert Armon
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Plant Root ◽  
Performance Comparison ◽  
Treatment System ◽  
Microbial Populations ◽  
Phenol Removal ◽  
Wastewater Treatment System

scholarly journals Economic feasibility for wastewater treatment system composed of wetlands for the wastewater reuse: a case study

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Robson Muniz McMahon Waite ◽  
Eduardo Gomes Salgado ◽  
Dirlane De Fátima do Carmo
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Subsurface Flow ◽  
Treatment System ◽  
Rate Of Return ◽  
Internal Rate Of Return ◽  
Wastewater Treatment System ◽  
Internal Rate ◽  
Financial Feasibility ◽  
Subsurface Flow Constructed Wetland

Water is an asset that is becoming scarce and its reuse is an alternative to preserve it. Social and environmental feasibility motivate the adoption of reuse, but the financial factor can be limited to its use. The objective of this study was to evaluate the economic and financial feasibility for the investment in a domestic wastewater treatment system in which the constructed wetlands could be used aiming at the reuse for irrigation. Instruments such as the minimum attractiveness rate, discounted payback, the internal rate of return and the profitability index were used. The treatment system composed of an equalization tank, a septic tank, horizontal subsurface flow constructed wetland, subsurface flow constructed wetland, and a maturation pond comprising 52 m², demonstrating that it is able to meet the criteria required for reuse. The organic load affluent to the system was projected to 220 mg L-1 at a flow rate of 600 L day-1 of sewage, obtaining removal efficiency above 98% for all parameters, except nitrogen and phosphorus. In the analysis of economic and financial feasibility, it was found that the internal rate of return found for the cash flow considered was 98% and the profitability index according to the present value was 3.28. It was found that the total employed would be recovered in up to two years. With the use of the system, 180 m³ of water would be saved annually, reducing the pressure on the public supply system, in addition to the sewage treatment and the scenic beauty provided by wetlands. Therefore, the system is not limited only to economic gains, but also to social and environmental gains.

Removal efficiency of the constructed wetland wastewater treatment system at Bainikeng, Shenzhen

1995 ◽  
Vol 32 (3) ◽  
pp. 31-40 ◽  
Author(s):  
Yang Yang ◽  
Zhencheng Xu ◽  
Kangping Hu ◽  
Junsan Wang ◽  
Guizhi Wang
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Constructed Wetland ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Design Flow ◽  
Treatment System ◽  
Wastewater Treatment System ◽  
Tennessee Valley ◽  
Wetland System

In this paper, three years study on a constructed wetland wastewater treatment system at Bainikeng, Shenzhen, is reviewed and summarized. The wetland system under study occupies an area of 8400m2, with a design flow of 3100 m3 per day. The study was conducted to understand removal efficiencies of constructed wetland systems for municipal wastewaters from small or medium scale towns in the sub-tropics. Such parameters as biological oxygen demand, chemical oxygen demand, suspended solids, total nitrogen, and total phosphorus in the influent and effluent of the wetland system are examined, and their removal rates are determined. It is shown that the system is very effective in removing organic pollutants and suspended solids and its removal efficiency is much similar to those of the constructed wetlands at Tennessee Valley Authority (TVA) (Choate et al., 1990) while better than those of conventional secondary biochemical treatments.

Cloning of Environmental Genomic Fragments as Physical Markers for Monitoring Microbial Populations in Coking Wastewater Treatment System

2006 ◽  
Vol 53 (1) ◽  
pp. 163-172 ◽  
Author(s):  
Xing Yan ◽  
Zhengmao Xu ◽  
Xiaoxi Feng ◽  
Yongdi Liu ◽  
Binbin Liu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Treatment System ◽  
Microbial Populations ◽  
Coking Wastewater ◽  
Wastewater Treatment System
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