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Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw

The effects of different potassium and nitrogen pretreatment strategies on the anaerobic digestion (AD) performance of rice straw (RS) were investigated. KOH, NH(3)·H(2)O and KOH + NH(3)·H(2)O combined pretreatments were applied. The results showed that KOH + NH(3)·H(2)O combined pretreatment achiev...

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Autores principales: Luo, Juan, Li, Juan, Zhang, Liang, Li, Nankun, Wachemo, Akiber Chufo, Liu, Chunmei, Yuan, Hairong, Li, Xiujin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055357/
https://www.ncbi.nlm.nih.gov/pubmed/35518629
http://dx.doi.org/10.1039/d0ra02136a
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author Luo, Juan
Li, Juan
Zhang, Liang
Li, Nankun
Wachemo, Akiber Chufo
Liu, Chunmei
Yuan, Hairong
Li, Xiujin
author_facet Luo, Juan
Li, Juan
Zhang, Liang
Li, Nankun
Wachemo, Akiber Chufo
Liu, Chunmei
Yuan, Hairong
Li, Xiujin
author_sort Luo, Juan
collection PubMed
description The effects of different potassium and nitrogen pretreatment strategies on the anaerobic digestion (AD) performance of rice straw (RS) were investigated. KOH, NH(3)·H(2)O and KOH + NH(3)·H(2)O combined pretreatments were applied. The results showed that KOH + NH(3)·H(2)O combined pretreatment achieved the highest biomethane production and TS (TS: total solid) removal rate of 274 mL g VS(−1) and 43.9%, which were 6.2–75.8% and 4.3–29.5% higher than that of single alkali pretreatments and untreated RS, respectively. The NH(3)·H(2)O groups improved the process stability, which maintained the NH(3)–N concentration in the range of 265–580 mg L(−1). It was also found that Bacteroidetes and Firmicutes were the dominant bacterial at phyla level, and the populations of acetate methanogen (Methanosarcina and Methanosaeta) were enriched in the AD system by KOH + NH(3)·H(2)O pretreatment. Furthermore, the cost of pretreatment agents can be recovered by the increased digestate nutritional value due to the K and N remaining in the digestate after AD. The results indicated that the KOH + NH(3)·H(2)O combined pretreatment might be a promising method for efficient AD of straw in future industrial applications.
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spelling pubmed-90553572022-05-04 Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw Luo, Juan Li, Juan Zhang, Liang Li, Nankun Wachemo, Akiber Chufo Liu, Chunmei Yuan, Hairong Li, Xiujin RSC Adv Chemistry The effects of different potassium and nitrogen pretreatment strategies on the anaerobic digestion (AD) performance of rice straw (RS) were investigated. KOH, NH(3)·H(2)O and KOH + NH(3)·H(2)O combined pretreatments were applied. The results showed that KOH + NH(3)·H(2)O combined pretreatment achieved the highest biomethane production and TS (TS: total solid) removal rate of 274 mL g VS(−1) and 43.9%, which were 6.2–75.8% and 4.3–29.5% higher than that of single alkali pretreatments and untreated RS, respectively. The NH(3)·H(2)O groups improved the process stability, which maintained the NH(3)–N concentration in the range of 265–580 mg L(−1). It was also found that Bacteroidetes and Firmicutes were the dominant bacterial at phyla level, and the populations of acetate methanogen (Methanosarcina and Methanosaeta) were enriched in the AD system by KOH + NH(3)·H(2)O pretreatment. Furthermore, the cost of pretreatment agents can be recovered by the increased digestate nutritional value due to the K and N remaining in the digestate after AD. The results indicated that the KOH + NH(3)·H(2)O combined pretreatment might be a promising method for efficient AD of straw in future industrial applications. The Royal Society of Chemistry 2020-07-06 /pmc/articles/PMC9055357/ /pubmed/35518629 http://dx.doi.org/10.1039/d0ra02136a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Luo, Juan
Li, Juan
Zhang, Liang
Li, Nankun
Wachemo, Akiber Chufo
Liu, Chunmei
Yuan, Hairong
Li, Xiujin
Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
title Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
title_full Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
title_fullStr Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
title_full_unstemmed Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
title_short Effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
title_sort effects of different potassium and nitrogen pretreatment strategies on anaerobic digestion performance of rice straw
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055357/
https://www.ncbi.nlm.nih.gov/pubmed/35518629
http://dx.doi.org/10.1039/d0ra02136a
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