Institut International d'Ingénierie de l'Eau et de l'Environnement: 2iE, Rue de la Science, 01 BP 594, Ouagadougou 01, Burkina Faso.
Water Sci Technol. 2010;61(4):919-25. doi: 10.2166/wst.2010.959.
Accumulation rates and pathogen concentrations in primary stabilization pond sludges in developing countries are important parameters for adequate sludge management and the safeguarding of public health with sludge reuse in agriculture. An anaerobic pond has been investigated for sludge accumulation rates and helminth egg viability after four years of operation in Burkina Faso. The rate of sludge accumulation was measured at 0.037 m(3)/capita-year or 2.26 kg dry weight/capita-year. An equation describing vertical distribution of total solids in the accumulated sludge was found to be adequately represented by a regression equation. Influent helminth egg concentrations were reduced on average by 90% in the anaerobic pond effluent. Ascaris lumbricoides and Ancylostoma sp. were the most common eggs present in the sludge after four years of operation. The average concentration of helminth eggs in pond sludge was 536 eggs/g TS, and the percentages of viability ranged from 10.8% (47 viable eggs/g TS) to 57.2 (1,772 viable eggs/g TS, with an average rate of 36% (336 viable eggs/g TS). From a sludge depth and section study, egg viability was found to be randomly distributed in the sludge layer.
在发展中国家，初级稳定塘污泥的积累率和病原体浓度是污泥管理的重要参数，也是保障公众健康和农业中再利用污泥的关键。本研究在布基纳法索运行四年后，调查了一个厌氧塘的污泥积累率和寄生虫卵的存活情况。污泥积累率为 0.037m3/人年或 2.26kg 干重/人年。发现可以用回归方程很好地描述总固体在积累污泥中的垂直分布。寄生虫卵在厌氧塘出水中的平均去除率为 90%。在运行四年后，污泥中最常见的卵是蛔虫和钩虫。池塘污泥中寄生虫卵的平均浓度为 536 个/克 TS，存活率从 10.8%（47 个活卵/克 TS）到 57.2%（1772 个活卵/克 TS，平均存活率为 36%（336 个活卵/克 TS）。从污泥深度和部分研究中发现，卵的存活率在污泥层中呈随机分布。
