氮磷前体物质对磷酸盐还原系统产气效能的影响

实验用泥取自污水处理厂,经培养驯化为具有磷酸盐还原功能的厌氧活性污泥,通过调整不同磷源(大豆卵磷脂、骨粉、六偏磷酸钠、磷酸氢二钾、次磷酸钠、亚磷酸钠)、氮源(氯化铵、蛋白胨)及氮磷配比,考察磷化氢产气效能及磷酸盐去除率.结果 显示:所选的磷源及氮源均能使磷酸盐还原系统产生磷化氢气体,说明磷酸盐还原系统对各种形态氮磷化合...

EFFECTS OF NITROGEN AND PHOSPHORUS PRECURSORS ON GAS PRODUCTION EFFICIENCY OF PHOSPHATE REDUCTION SYSTEMS

The experimental sludge, which was taken from a sewage treatment plant, was domesticated into anaerobic activated sludge with phosphate reduction function through cultivation. By adjusting different phosphorus sources (soybean lecithin, bone meal, sodium hexametaphosphate, dipotassium hydrogen phosphate, sodium hypophosphite and sodium phosphite), nitrogen source (ammonium chloride, peptone) and N/P ratio, the gas production efficiency of phosphine and removal rate of phosphate were measured in this research. The results showed that both the phosphorus source and nitrogen source used in this experiment could produce phosphine gas in the phosphate reduction system (PRS), which indicated that the PRS had a good adaptability to various nitrogen and phosphorus compounds. In addition, the inorganic phosphorous sodium as the single phosphorus source, had the largest gas production and the organic phosphorus represented by soybean lecithin produced the least amount of gas. The addition of bone meal and sodium hypophosphite could promote the increase of gas production in PRS. What's more, the inorganic nitrogen ammonium chloride as a nitrogen source, had a large gas production with the optimum ratio of nitrogen to phosphorus of 4:1, while the ratio was also 4:1 when peptone was used as nitrogen source. The mixing of these two nitrogen sources could promote the production of phosphine.