Abstract
A pilot cyanobacteria bio-reactor for household usage was tested to treat kitchen sewage. The bio-reactor could efficiently reduce the sewage malodor, coagulate lipids, raise its pH and clarify sewage. The sewage treated by this bio-reactor could be in line with Taiwan EPA (Environmental Protection Administration) standard for drainage. The tap water diluted 1:50 of treated sewage had been tested for using as agricultural liquid bio-fertilizer. The fertilizer had lower fly attraction rate than untreated sewage. The treated sewage diluted 1:50 has been used to raise fish tilapia (Oreochromis mossambicus) successfully. For an average four member family in Taiwan, about 3.2 kg (kilograms) of kitchen waste may produce each day, and about 40% (1.3 kg) of sewage may be sieved down. If every family can prepare two sets of this easy operative and cost effective bio-reactor tanks and operate them alternately, most family kitchen sewage can be treated at home.
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