水处理方式和饲料种类对发酵沼液养分特征的影响

Effect of Water-saving Models and Feed Type to Biogas Slurry Nutrient Characteristics

为找出猪场最优节水处理模式,进而以其沼液低成本配制高效有机液体复合肥,以海南省海口市美兰区罗牛山农场猪栏每天用水量一水池厌氧发酵正常排出的普通沼液为对照,分别收集各节水处理猪粪尿进行厌氧发酵,而后测定沼液中养分N、P、K含量。结果表明:在节水处理条件下猪粪尿厌氧发酵后其沼液养分N、P、K含量远高于对照,池中用水量越少,其沼液养分N、P、K含量越高;留存时间越长,其沼液养分N、P、K含量越高;因饲料不同,同等条件下猪食用303青牧原饲料废水沼液养分含量高于猪食用313青牧原饲料。最优的节水收集模式为133 kg池中用水量、留存3 d、猪食用青牧原303饲料的模式。为达到沼液中较高的养分含量,建议猪栏水池中采用较少的用水量、较长的留存时间来收集原材料。

In order to find the optimal water-saving model of pig feces, and further to make up a low-cost and efficient fluid organic compound fertilizer. Used average fermented liquid which discharged normally from anaerobic fermentation by use of amount of water each day -the sink in the Luoniu Mountain pig bar in the Meilan District, Haikou as a control, various water-saving treatment pig feces were collected to anaerobic fermentation, and then N, P and K content was measured. The results showed that N, P and K content with each water-saving treatment pig feces anaerobic fermentation was much more than that of the control. The less the amount of water in pool, the higher the concentrations of N, P and K content for biogas slurry; The longer the storage, the higher the concentrations of N, P and K content for biogas slurry; Because feed was various, nutrition content of the fermented liquid from pig using the brand of Qing Muyuan 303 was higher than that of pig using the brand of Qing Muyuan 313 under the same condition. The best water-saving collected model was that 133 kg water stored for three days, then pig used feed（the brand of Qing Muyuan 303）was collected. The results suggested that little amount of water in the biogas slurry pigsty pool, longer storage time be chosen.