Influence of phosphogypsum on composting process and quality of wine residue
In order to explore a new way of solid waste recycling of wine residue and phosphogypsum,wine residue and corn straw were used as the substrates for composting,and different mass fractions (based on the dry weight of organic substrates) of phosphogypsum were added as the treatments,namely,0 (G0 ),15％(G15 ),30％ (G30 ),50％ (G50 ),75％ (G75 ),and 100％ (G100 ),to explore the effect of phosphogypsum addition on fcomposting process and quality.The results showed that,compared with the G0 treatment,the addition of phosphogypsum short-ened the high temperature period by 4-5 d and increased the highest temperature during composting by 1.8-6.6℃.During the composting process,the largest decrease of the carbon/nitrogen ratio was found under the G15 and G30 treatments.After the composting,the bulk density,porosity,total nutrients content,heavy metal content,seed ger-mination index of the G15 and G30 treatments all fitted the corresponding criteria.The composting products of all treat-ments were used as the substrate for cucumber cultivation.By principle component analysis,it was revealed that the highest comprehensive score was achieved under the G30 treatment,which was followed by the G15 treatment,while the comprehensive score of G50,G75,G100 treatments was negative.In general,adding 30％ phosphogypsum into wine residue and corn straw composting showed the best performance when used as the matrix,while excessive addi-tion of phosphogypsum would cause negative effect.
万方数据
维普
