Design models for adsorption systems in wastewater treatment

1981 ◽  
Vol 31 (1) ◽  
pp. 717-731 ◽  
Author(s):  
Gordon McKay
Keyword(s):  
Wastewater Treatment ◽  
Design Models ◽  
Adsorption Systems

Comparison of operational design criteria for subsurface flow constructed wetlands for wastewater treatment

2001 ◽  
Vol 43 (11) ◽  
pp. 301-308 ◽  
Author(s):  
K. M. Leonard ◽  
G. W. Swanson
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Rate Constant ◽  
Environmental Protection Agency ◽  
Reaction Rate ◽  
Subsurface Flow ◽  
Plug Flow ◽  
Reaction Rate Constant ◽  
Design Standards ◽  
Design Models

Many communities are investigating the use of constructed wetlands as a simple, viable alternative to poorly operating on-site wastewater treatment. Currently, the most popular design models in the U.S.A. for subsurface flow units are the US Environmental Protection Agency (EPA) and the Tennessee Valley Authority (TVA) methods. However, there has been limited data verifying if the operating performance is up to design standards. In order to address this problem, this paper documents the performance of such treatment systems over a broad range of conditions in North Alabama. The operational data is used to determine a best-fit value of reaction rate constant and proposes improved input parameters for both design models. According to this data, the average plug-flow reaction rate constant was calculated to be 0.70 d-1 for the EPA method, while the recommended organic loading criterion is 11.4 m2/kg BOD5 per day into the wetland for the TVA method.

scholarly journals Modified Chitosan Forms for Cr (VI) Removal

2021 ◽  
Author(s):  
Şerife Parlayıcı ◽  
Erol Pehlivan
Keyword(s):  
Wastewater Treatment ◽  
High Activity ◽  
Functional Groups ◽  
Wastewater Treatment Plants ◽  
Batch Adsorption ◽  
Modified Chitosan ◽  
Natural Substances ◽  
Modified Adsorbents ◽  
Textual Content ◽  
Adsorption Systems

The forms of utility in the wastewater treatment of chitosan-based adsorbents acquired from natural substances have attracted numerous attentions in recent years. The use of chitosan modified adsorbents for removal of the chromium has aroused great interest. When chitosan-based modified adsorbents are considered, they have got large amount of an amino (-NH2) and hydroxyl (-OH) functional groups. Such adsorbents display that they have high activity and therefore they may be extensively utilized in wastewater treatment plants to cast off chromium. In this chapter, the utility outcomes of chitosan-based substances will be explained after applying different parameters to remove Cr (VI) from the aqueous surrounding with the information obtained the use of batch adsorption systems. Application of various chitosan-based adsorbents for Cr (VI) removal application will be demonstrated in a detailed way and they will be discussed within the textual content.

RESEARCH AND EVALUATE TREATMENT EFFICIENCY ON TAPIOCA PROCESSING INDUSTRIAL WASTEWATER BY AEROBIC BIOFILTER TECHNOLOGY WITH VARIOUS MATERIALS

2010 ◽  
Vol 13 (3) ◽  
pp. 54-66
Author(s):  
Phuong Thi Thanh Nguyen ◽  
Phuoc Van Nguyen ◽  
Anh Cam Thieu
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Utilization Rate ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Research Results ◽  
Loading Rates

This study was performed to evaluate the efficiency of tapioca processing wastewater treatment using aerobic biofilter with variety of biofilter media: coir, coal, PVC plastic and Bio - Ball BB15 plastic. Research results in the lab demonstrated all four aerobic biofilter models processed can treated completely N and COD which COD reached 90-98% and N reached 61-92%, respectively, at the organic loading rates in range of 0.5, 1, 1.5 and 2 kgCOD/m3.day. The results identified coir filter was the best in four researched materials with removal COD and specific substract utilization rate can reach 98%, and 0.6 kg COD/kgVSS.day. Research results open the new prospects for the application of the cheap materials, available for wastewater treatment.

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