利用食物垃圾和乳粪消化池生产生物肥料的营养特性及中试研究

IF 1.4 4区 农林科学 Q3 AGRICULTURAL ENGINEERING Transactions of the ASABE Pub Date : 2021-01-01 DOI:10.13031/trans.13767
Tyler J. Barzee, Abdolhossein Edalati, Joshua Rapport, H. El-mashad, Ruihong Zhang
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引用次数: 3

摘要

n, P, Ca和Mg主要定位于细消化固体(0.45µm至1 mm)。50% ~ 60%的NH4+-N存在于0.45 ~ 75µm的消化固体中。K和Na主要转移到超滤渗透膜(<0.45µm)。粗、细固体混合可优化产品中营养和盐的比例。在中试规模处理(振动筛、超滤、晒干)生产固体和液体生物肥料产品之前,在实验室对商业消化器消化的食物垃圾和奶牛粪便进行了颗粒和营养分布的表征。实验结果表明,两种消化液的元素组成不同,但有相似之处。两种消化液的粗固体组分的营养物质浓度都低于含有大部分钾和钠的液体组分。乳肥消化液中0.4 ~ 75µm的细固体含量高于餐厨垃圾消化液,但TKN主要存在于两种消化液的细固体中。优化分析表明,消化物组分的最佳组合包括70%以上的粗固体,以获得理想的营养和盐比。从中试规模加工中获得的固体和液体肥料产品与实验室规模调查的预期产品相似。关键词:生物肥料配方,消化,养分分配,中试处理,超滤,增值产品
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Characterization of Nutrients and Pilot Biofertilizer Production from Food Waste and Dairy Manure Digestates
HighlightsN, P, Ca, and Mg were mainly localized to fine digestate solids (0.45 µm to 1 mm).50% to 60% of NH4+-N was found in digestate solids between 0.45 and 75 µm.K and Na were mainly transferred to the ultrafiltration permeate (<0.45 µm).Mixing of coarse and fine solids can optimize nutrient and salt ratios in products.Abstract. Food waste and dairy manure digestates from commercial digesters were characterized in the lab for particle and nutrient distributions before pilot-scale processing (vibratory screen, ultrafiltration, sun drying) to produce solid and liquid biofertilizer products. Experimental results showed that the elemental compositions of the two digestates were different but shared similarities. The coarse solids of both digestates had lower concentrations of nutrients than the liquid fractions, which contained most of the K and Na. The dairy manure digestate had a higher amount of fine solids between 0.4  and 75 µm than the food waste digestate, but the majority of TKN was contained in the fine solids of both digestates. An optimization analysis concluded that optimal combinations of digestate fractions included over 70% coarse solids to obtain desired nutrient and salt ratios. The solid and liquid fertilizer products derived from the pilot-scale processing were similar to those expected from the lab-scale investigation. Keywords: Biofertilizer formulation, Digestate, Nutrient distribution, Pilot-scale processing, Ultrafiltration, Value-added products.
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来源期刊
Transactions of the ASABE
Transactions of the ASABE AGRICULTURAL ENGINEERING-
CiteScore
2.30
自引率
0.00%
发文量
0
审稿时长
6 months
期刊介绍: This peer-reviewed journal publishes research that advances the engineering of agricultural, food, and biological systems. Submissions must include original data, analysis or design, or synthesis of existing information; research information for the improvement of education, design, construction, or manufacturing practice; or significant and convincing evidence that confirms and strengthens the findings of others or that revises ideas or challenges accepted theory.
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