A novel chitosan and polyferric sulfate composite coagulant for biogas slurry pretreatment by simultaneous flocculation and floatation: Performance and underlying mechanisms

絮凝作用 壳聚糖 泥浆 复合数 化学 硫酸盐 沼气 制浆造纸工业 凝结 厌氧消化 色谱法 化学工程 废物管理 环境科学 环境工程 材料科学 甲烷 工程类 复合材料 有机化学 心理学 精神科
作者
Ruohan Xia,Wancen Liu,Long D. Nghiem,Dingge Cao,Yun Li,Guoxue Li,Wenhai Luo
出处
期刊:Water Research [Elsevier BV]
卷期号:258: 121781-121781 被引量:3
标识
DOI:10.1016/j.watres.2024.121781
摘要

Biogas slurry from anaerobic digestion is rich in active nutrients but has not been fully utilized due to a high content of suspended solids (SS) causing clogging during agricultural irrigation. This study aimed to evaluate the performance of a novel chitosan and polyferric sulfate (CTS-PFS) composite coagulant for simultaneous flocculation and floatation to enhance SS removal while preserving nutrients in biogas slurry. Orthogonal method was used for experimental design to determine the optimal synthesis and operational conditions of CTS-PFS. Results show that CTS-PFS outperformed individual CTS and PFS coagulant in terms of SS removal and nutrient (nitrogen, phosphorus, and potassium) preservation. Compared to individual CTS and PFS coagulation, the combination of CTS and PFS at the mass ratio of 1:6 showed significantly higher performance by 41.5% increase in SS removal and 5.2% reduction in nutrient loss. The improved performance of CTS-PFS was attributed to its formation of polynuclear hydroxyl complexes with ferric oxide groups (e.g. Fe-OH, Fe-O-Fe, Fe-OH-Fe and COO-Fe) to strengthen charge neutralization and adsorption bridging. Data from this study further confirm that CTS-PFS enhanced the removal of small suspended particles and dissolved organic matter in the molecular weight range of 0.4 – 2.0 kDa and preserved ammonia and potassium better in biogas slurry. Bubbles were generated as hydrogen ions from coagulant hydrolysis interacted with bicarbonate and carbonate in biogas slurry for removing the produced flocs by floatation. Floc flotation was more effective in CTS-PFS coagulation due to the significant production of uniform bubbles, evidenced by the reduction in the viscosity of biogas slurry.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
1秒前
2秒前
科研助手6应助gz采纳,获得10
2秒前
彭于晏应助gz采纳,获得10
2秒前
鱼与木头发布了新的文献求助10
3秒前
绿泡泡发布了新的文献求助10
4秒前
今后应助Transition采纳,获得10
6秒前
Chelry发布了新的文献求助10
6秒前
大大怪发布了新的文献求助10
7秒前
乐乐应助lina采纳,获得10
9秒前
10秒前
10秒前
gz完成签到,获得积分10
13秒前
哲别发布了新的文献求助10
14秒前
SciGPT应助科研通管家采纳,获得10
17秒前
香蕉觅云应助科研通管家采纳,获得10
17秒前
17秒前
充电宝应助科研通管家采纳,获得10
17秒前
李健应助科研通管家采纳,获得10
17秒前
义气严青完成签到,获得积分10
17秒前
18秒前
18秒前
19秒前
23秒前
某某完成签到,获得积分20
25秒前
26秒前
Owen应助shore采纳,获得10
26秒前
小熊完成签到,获得积分10
27秒前
英姑应助丸子_2025000采纳,获得10
28秒前
yydragen应助rita_sun1969采纳,获得30
28秒前
可爱的函函应助大喵采纳,获得10
29秒前
33秒前
包李发布了新的文献求助10
33秒前
34秒前
打打应助自由的读书人采纳,获得10
38秒前
共享精神应助bbh采纳,获得10
39秒前
研友_VZG7GZ应助bbh采纳,获得10
39秒前
小小完成签到,获得积分10
39秒前
大喵发布了新的文献求助10
39秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989797
求助须知:如何正确求助?哪些是违规求助? 3531914
关于积分的说明 11255516
捐赠科研通 3270597
什么是DOI,文献DOI怎么找? 1805008
邀请新用户注册赠送积分活动 882181
科研通“疑难数据库(出版商)”最低求助积分说明 809190