农用制革污泥中铬的释放及其供氮能力  

Chrome liberation and nitrogen supply in tannery sludge agricultural application

作　　者：李桂菊[1] 丁绍兰[2] 章川波[2] 俞从正[2] 

机构地区：[1]齐齐哈尔大学皮革教研室,齐齐哈尔161006 [2]西北轻工业学院皮革系,咸阳712081

出　　处：《中国皮革》2001年第15期6-7,11,共3页China Leather

基　　金：联合国工发组织项目

摘　　要：利用恒温培养试验 ,测得堆肥污泥中铬的潜在释放量最大可达总输入量的 2 5% ,通过测定氮的动态变化 ,依一级反应动力学方程求得 ,在理想条件下 ,堆肥污泥中 92 %的氮可以矿化。氮的矿化量与时间的关系 ,可用回归方程 1/ Nt=1/ No+b/ t良好拟合 ,其中 Nt为在 t培养时间内氮的累积矿化量 ,t为周数 。Constant temperature culture experiments are carried out. The maximum chrome liberation content of composted tannery sludge is determined, which is 25% of the total input chrome content. According to the reaction dynamics programe of the first order, the maximum nitrogen supply content for crops growth in ideal conditions is 92%, which is obtained by the detection the variation of nitrogen mineralization amount. The relationship between nitrogen mineralization amount and time conforms to the regression equation. The equation is 1/N t=1/N o+b/t,N t is the cumulative nitrogen mineralization amount in culture time (t), t is a number of the weeks, N o is the potential nitrogen mineralization amount.

关 键 词：铬 污泥 堆肥 制革工业 供氮能力 释放量 

分 类 号：S153[农业科学—土壤学]