Modelling the link amongst fine-pore diffuser fouling, oxygen transfer efficiency, and aeration energy intensity

被引：28

作者：

Garrido-Baserba, Manel ^{[1
,2
]}

Sobhani, Reza ^{[3
]}

Asvapathanagul, Pitiporn ^{[1
,4
]}

McCarthy, Graham W. ^{[5
]}

Olson, Betty H. ^{[1
,2
]}

Odize, Victory ^{[6
]}

Al-Omari, Ahmed ^{[6
]}

Murthy, Sudhir ^{[6
]}

Nifong, Andrea ^{[7
]}

Godwin, Johnnie ^{[8
]}

Bott, Charles B. ^{[8
]}

Stenstrom, Michael K. ^{[9
]}

Shaw, Andrew R. ^{[10
]}

Rosso, Diego ^{[1
,2
]}

机构：

[1] Univ Calif Irvine, Dept Civil & Environm Engn, Irvine, CA 92697 USA

[2] Univ Calif Irvine, Water Energy Nexus Ctr, Irvine, CA 92697 USA

[3] Orange Cty Sanitat Dist, 10844 Ellis Ave, Fountain Valley, CA 92708 USA

[4] Calif State Univ Long Beach, Dept Civil Engn & Construct Engn Management, Long Beach, CA 90840 USA

[5] Santa Margarita Water Dist, 26111 Antonio Pkwy, Ladera Ranch, CA 92688 USA

[6] DC Water, 5000 Overlook Ave SW, Washington, DC 20032 USA

[7] World Water Works, 4000 SW 113th St, Oklahoma City, OK 73173 USA

[8] Hampton Roads Sanitat Dist, Virginia Beach, VA 23471 USA

[9] Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA

[10] Black & Veatch Consulting Engineers, 8400 Ward Pkwy, Kansas City, MO 64114 USA

来源：

WATER RESEARCH | 2017年 / 111卷

基金：

美国国家环境保护局;

关键词：

Aeration efficiency; Fouling; Fine pore diffuser; Energy projection; Activated sludge process; ACTIVATED-SLUDGE BIOREACTOR; WASTE-WATER TREATMENT; SYSTEMS; RETENTION; PLANT; TIME;

D O I：

10.1016/j.watres.2016.12.027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This research systematically studied the behavior of aeration diffuser efficiency over time, and its relation to the energy usage per diffuser. Twelve diffusers were selected for a one year fouling study. Comprehensive aeration efficiency projections were carried out in two WRRFs with different influent rates, and the influence of operating conditions on aeration diffusers' performance was demonstrated. This study showed that the initial energy use, during the first year of operation, of those aeration diffusers located in high rate systems (with solids retention time - SRT-less than 2 days) increased more than 20% in comparison to the conventional systems (2 > SRT). Diffusers operating for three years in conventional systems presented the same fouling characteristics as those deployed in high rate processes for less than 15 months. A new procedure was developed to accurately project energy consumption on aeration diffusers; including the impacts of operation conditions, such SRT and organic loading rate, on specific aeration diffusers materials (i.e. silicone, polyurethane, EPDM, ceramic). Furthermore, it considers the microbial colonization dynamics, which successfully correlated with the increase of energy consumption (r(2):0.82 +/- 7). The presented energy model projected the energy costs and the potential savings for the diffusers after three years in operation in different operating conditions. Whereas the most efficient diffusers provided potential costs spanning from 4900 USD/Month for a small plant (20 MGD, or 74,500 m(3)/d) up to 24,500 USD/Month for a large plant (100 MGD, or 375,000 m3/d), other diffusers presenting less efficiency provided spans from 18,000USD/Month for a small plant to 90,000 USD/Month for large plants. The aim of this methodology is to help utilities gain more insight into process mechanisms and design better energy efficiency strategies at existing facilities to reduce energy consumption. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：127 / 139

页数：13

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