Performance and kinetics of algal-bacterial photobioreactor (AB-PBR) treating septic tank effluent

被引：9
作者：
Chaiwong, Chawalit [1 ]
Koottatep, Thammarat [1 ]
Surinkul, Nawatch [2 ]
Polprasert, Chongrak [3 ]
机构：
[1] Asian Inst Technol, Sch Environm Resources & Dev, Environm Engn & Management, Pathum Thani, Thailand
[2] Mahidol Univ, Fac Engn, Dept Civil & Environm Engn, Salaya, Nakorn Pathom, Thailand
[3] Thammasat Univ, Fac Engn, Dept Civil Engn, Pathum Thani, Thailand
来源：
WATER SCIENCE AND TECHNOLOGY | 2018年 / 78卷 / 11期
基金：
比尔及梅琳达.盖茨基金会;
关键词：
algal-bacterial photobioreactor; kinetic model; on-site sanitation system; septic tank effluent; WASTE-WATER TREATMENT; BIOFILM PHOTOBIOREACTORS; CHLORELLA-VULGARIS; REMOVAL; BIOREACTOR; NITROGEN; BIOMASS; GROWTH; SLUDGE; CARBON;
D O I：
10.2166/wst.2018.519
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Septic tank effluent contains high organic and nutrient contents. This study aimed to evaluate treatment performance of an algal-bacterial photobioreactor (AB-PBR) treating the septic tank effluent. The experimental unit employed a transparent plastic medium made from recycled drinking water bottles for attached-growth biofilm. Red LED lamp (light intensity similar to 100 mu mol/m(2)/s) was applied as an energy source for the growth of algal-bacterial biofilm in the AB-PBR. The experimental results showed that AB-PBR operated at the hydraulic retention time (HRT) of 3 days gave the highest chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) removal efficiencies of 64, 45 and 35%, respectively, by which the effluent COD concentrations could meet the effluent standards of Thailand, but the effluent TN and TP concentrations needed to be further removed. The Stover-Kincannon model was applied to determine the kinetic values of COD and TN removals with R-2 values greater than 0.8. Microbiological examinations indicated Chlorella sp. is the predominant algal species growing in the AB-PBR, while the amplicon sequencing information analytical results revealed the bacterial phylum of Proteobacteria to be the predominant bacterial group.
引用
收藏
页码：2355 / 2363
页数：9
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