School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, China.
College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
Waste Manag. 2018 Feb;72:161-167. doi: 10.1016/j.wasman.2017.11.025. Epub 2017 Nov 16.
Delayed addition of Nitrogen (N)-rich and acidic substrates was investigated to evaluate its effects on N loss and compost quality during the composting process. Three different delayed adding methods of N-rich (pig manure) and acidic substrates (phosphate fertilizer and rotten apples) were tested during the pig manure and wheat straw is composting. The results showed that delayed addition of pig manure and acidic materials led two temperature peaks, and the durations of two separate thermophilic phase were closely related to the amount of pig manure. Delayed addition reduced total N loss by up to 14% when using superphosphate as acidic substrates, and by up to 12% when using rotten apples as acidic substrates, which is mainly due to the decreased NH emissions. At the end of composting, delayed the addition of pig manure caused a significant increase in the HS (humus substance) content, and the highest HS content was observed when 70% of the pig manure was applied at day 0 and the remaining 30% was applied on day 27. In the final compost, the GI in all treatments almost reached the maturity requirement by exceeding 80%. The results suggest that delayed addition of animal manure and acidic substrates could prevent the N loss during composting and improve the compost quality.
延迟添加富氮（N）和酸性基质被研究用于评估其在堆肥过程中对 N 损失和堆肥质量的影响。在猪粪和小麦秸秆堆肥过程中，测试了富氮（猪粪）和酸性基质（磷肥和烂苹果）的三种不同延迟添加方法。结果表明，延迟添加猪粪和酸性物质导致了两个温度高峰，两个独立的高温阶段的持续时间与猪粪的量密切相关。当使用过磷酸钙作为酸性基质时，延迟添加可将总 N 损失减少多达 14%，当使用烂苹果作为酸性基质时，可将总 N 损失减少多达 12%，这主要是由于 NH 的排放量减少。在堆肥结束时，延迟添加猪粪导致腐殖质（HS）含量显著增加，当 70%的猪粪在第 0 天添加，其余 30%在第 27 天添加时，HS 含量最高。在最终的堆肥中，所有处理的 GI 几乎都达到了成熟要求，超过了 80%。结果表明，延迟添加动物粪便和酸性基质可以防止堆肥过程中的 N 损失，提高堆肥质量。
