MUNICIPAL WASTE WATER TREATMENT PLANT DESIGN TO PRODUCE BYPRODUCTS AND RECYCLE WATER OF DRINKING WATER QUALITY

摘要

A domestic waste water plant design to replace the Activated Sludge process uses modern biochemical engineering equipment and two continuous pure culture fermentations to produce three valuable by products. The first is an anaerobic digestion of cellulosic solids from the primary clarifier by methane producing obligate anaerobes gives fuel and organic fertilizer. The second produces algae or yeast for animal/fish feed by metabolizing organics nitrogen and phosphorous in the filtered overflow of the clarifier by aerobic fermentation of a pure cultures in a side arm fermenter where filtrate is purged and cells are concentrated. The sterile filtrate is further filtered in a hollow fiber UF /RO unit to purify the microbe free water to drinking water standards and recycle it to the municipal water supply.