Resource recovery from septic tank effluent using duckweed-based tilapia aquaculture

被引：6

作者：

El-Shafai, Saber A. ^{[1
,2
]}

Abdel-Gawad, Fagr Kh. ^{[1
]}

Samhan, Farag ^{[1
]}

Nasr, Fayza A. ^{[1
]}

机构：

[1] Natl Res Ctr, Cairo, Egypt

[2] King Saud Univ, Coll Engn, Dept Civil Engn, Riyadh 11421, Saudi Arabia

来源：

ENVIRONMENTAL TECHNOLOGY | 2013年 / 34卷 / 01期

关键词：

duckweed wastewater; micronucleus; nutrients; septic tank; Nile tilapia; TROUT ONCORHYNCHUS-MYKISS; NUTRIENT RECOVERY; IMMUNE-RESPONSE; SEWAGE EFFLUENT; WATER; NITRITE; QUALITY; PERFORMANCE; RETENTION; AEROMONAS;

D O I：

10.1080/09593330.2012.689357

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two parallel duckweed ponds were deployed to utilize nutrients from the effluent of a septic tank treating domestic wastewater. The effluent and fresh biomass of duckweed pond were fed to two subsequent fish ponds stocked with Nile tilapia (Oreochromis niloticus). Fish ponds receiving freshwater and commercial feed were used as control. The results of specific growth rate and feed conversion ratio showed no significant difference between the control ponds and treatment ponds. On the other hand, the total and net fish yields were significantly higher in the control. Microbial analysis revealed contamination of gills, intestine and liver of fish in the treatment ponds. The activity of the immune response genes was up-regulated in the brain and liver of the treatment samples. A micronucleus assay revealed a similar percentage of micronuclei in the polychromatic erythrocytes of blood in the control and treatment samples, while the treatment samples a had higher incidence of micronuclei in the polychromatic erythrocytes of gills, compared with the control.

引用

页码：121 / 129

页数：9

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