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废水、滤泥和蔗髓都是酒精厂和糖厂所产生的有机废物。田间试验的结果表明:以上3种物质按1:1:0.3的重量比混合施于蔗地,能使甘蔗产量增加。由于施用了这种混合废物,土壤中的 pH 值、有效磷以及可溶性钾明显地增加,当施用40吨/公顷的这种混合有机废物时,估计 N、P_2O_5、K_2O的用量将会分别减少至50、10、100公斤/公顷/造。减少了化学氮素的用量,对甘蔗植株中蔗糖含量的积累显示出良好的效果。按10—40吨/公顷(以干物为基数)量直接施用污泥饼于蔗地的试验结果表明,处理区比对照区的甘蔗产量高出11—18%。然而,当施用污泥饼从10—90吨/公顷时,土壤中的电导率(EC)随着活性污泥的比例增加而增加,增幅8.4—139.3%。建议污泥饼的用量不要超过50吨/公顷/造。把糖厂产生的有机废物用于蔗地的这种处理方法,可以收到改善污染管理和植物营养素被重复利用的双重效益。从纸浆厂排出的活性污泥,通常含有一些有毒性的化学物质,它可能对作物生长有害。因此在应用工业废物时,首先要考虑保护土壤环境免受其不良影响。
Wastewater, mud and sugar cane are all organic wastes produced by alcohol and sugar mills. The results of the field experiment showed that the above three substances were mixed and applied to the sugarcane field at the weight ratio of 1: 1: 0.3, which could increase the output of sugarcane. Due to the significant increase in pH, available P and soluble K in the soil due to the application of this mixed waste, it is estimated that the amount of N, P_2O_5, K_2O, when applied to 40 mt / ha of this mixed organic waste, will be reduced to 50,10,100 kg / ha / make. Reduce the amount of chemical nitrogen, sucrose plant sugar accumulation in the show a good effect. The results of direct application of sludge cake in sugarcane field at the rate of 10-40 t / ha (dry basis) showed that the yield of sugarcane in the treatment area was 11-18% higher than that in the control area. However, when the sludge cake was applied from 10-90 t / ha, the conductivity in the soil (EC) increased with the proportion of activated sludge increasing by 8.4-139.3%. Suggest sludge cake not more than 50 tons / ha / make. This treatment of organic waste from sugar mills for sugarcane can receive the dual benefits of improved pollution management and the reuse of plant nutrients. Activated sludge discharged from pulp mills usually contains some toxic chemicals that may be harmful to crop growth. Therefore, in the application of industrial waste, we must first consider the protection of the soil environment from its adverse effects.