Sustainable management of petrochemical wastewater using algal-bacterial granules followed by biogas and biochar production: A techno-economic perspective

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-10-26 DOI:10.1016/j.jwpe.2024.106391

Hani Ezz , Mona G. Ibrahim , Manabu Fujii , Mahmoud Nasr

{"title":"Sustainable management of petrochemical wastewater using algal-bacterial granules followed by biogas and biochar production: A techno-economic perspective","authors":"Hani Ezz , Mona G. Ibrahim , Manabu Fujii , Mahmoud Nasr","doi":"10.1016/j.jwpe.2024.106391","DOIUrl":null,"url":null,"abstract":"<div><div>Despite several studies on algae-bacterial systems for treating industrial wastewater, there remains a gap in research focused on the recyclability of the resulting sludge to ensure economically sustainable waste management. Hence, this study focuses on utilizing the ABGS technique to treat petrochemical wastewater laden with mono-ethylene glycol (MEG), then managing the produced sludge using the anaerobic digestion and pyrolysis processes. The bioreactor containing ABGS (R<sub>A-B</sub>) was operated by increasing the MEG loading rates (GLR) from 2 to 8 kg/m<sup>3</sup>/d for 90 days, and its performance was compared with the bioreactor including bacterial granular sludge (R<sub>B</sub>). The chemical oxygen demand (COD), ammonia nitrogen, total inorganic nitrogen, and phosphorus removal efficiencies for R<sub>A-B</sub> were better than the R<sub>B</sub> unit by 6.23 %, 8.13 %, 37.67 %, and 19.24 %, respectively, at GLR = 4 kg/m<sup>3</sup>/d. The anaerobic digestion of the exhausted R<sub>A-B</sub> granules for 40 days obtained a biogas recovery of 220 ± 11.25 mL/g VS, higher than the R<sub>B</sub> digestion scenario by 13.4 %. The sludge digestate was thermally treated to yield 0.68 g biochar/g, with an O:C molar ratio < 0.2 and P content of 23 %. The economic feasibility of the combined ABGS/digestion/pyrolysis scheme could earn profits from pollutants' shadow price, biogas sales, biochar marketing, and carbon credits, achieving 8.93-year payback period. Because the R<sub>A-B</sub> granules could fulfill sustainable development goals related to climate change mitigation, and human health and aquatic life protection, future studies should focus on understanding the microbial consortia responsible for MEG degradation and determining the different biochar applications.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"68 ","pages":"Article 106391"},"PeriodicalIF":6.3000,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714424016234","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Despite several studies on algae-bacterial systems for treating industrial wastewater, there remains a gap in research focused on the recyclability of the resulting sludge to ensure economically sustainable waste management. Hence, this study focuses on utilizing the ABGS technique to treat petrochemical wastewater laden with mono-ethylene glycol (MEG), then managing the produced sludge using the anaerobic digestion and pyrolysis processes. The bioreactor containing ABGS (R_A-B) was operated by increasing the MEG loading rates (GLR) from 2 to 8 kg/m³/d for 90 days, and its performance was compared with the bioreactor including bacterial granular sludge (R_B). The chemical oxygen demand (COD), ammonia nitrogen, total inorganic nitrogen, and phosphorus removal efficiencies for R_A-B were better than the R_B unit by 6.23 %, 8.13 %, 37.67 %, and 19.24 %, respectively, at GLR = 4 kg/m³/d. The anaerobic digestion of the exhausted R_A-B granules for 40 days obtained a biogas recovery of 220 ± 11.25 mL/g VS, higher than the R_B digestion scenario by 13.4 %. The sludge digestate was thermally treated to yield 0.68 g biochar/g, with an O:C molar ratio < 0.2 and P content of 23 %. The economic feasibility of the combined ABGS/digestion/pyrolysis scheme could earn profits from pollutants' shadow price, biogas sales, biochar marketing, and carbon credits, achieving 8.93-year payback period. Because the R_A-B granules could fulfill sustainable development goals related to climate change mitigation, and human health and aquatic life protection, future studies should focus on understanding the microbial consortia responsible for MEG degradation and determining the different biochar applications.

Abstract Image

查看原文本刊更多论文

利用藻类细菌颗粒以及沼气和生物炭生产对石油化工废水进行可持续管理：技术经济视角

尽管对用于处理工业废水的藻类-细菌系统进行了多项研究，但在对所产生污泥的可回收性进行研究以确保经济上可持续的废物管理方面仍存在差距。因此，本研究的重点是利用 ABGS 技术处理含单乙二醇（MEG）的石化废水，然后利用厌氧消化和热解工艺处理产生的污泥。将 MEG 加载率（GLR）从 2 kg/m3/d 提高到 8 kg/m3/d 后，含 ABGS 的生物反应器（RA-B）运行了 90 天，并将其性能与含细菌颗粒污泥（RB）的生物反应器进行了比较。当 GLR = 4 kg/m3/d 时，RA-B 的化学需氧量（COD）、氨氮、无机氮总量和磷去除率分别比 RB 设备高出 6.23 %、8.13 %、37.67 % 和 19.24 %。对耗尽的 RA-B 颗粒进行厌氧消化 40 天后，沼气回收率为 220 ± 11.25 mL/g VS，比 RB 消化方案高出 13.4%。污泥消化液经热处理后产生 0.68 克生物炭/克，O:C 摩尔比为 0.2，P 含量为 23%。ABGS/消化/热解组合方案的经济可行性可从污染物影子价格、沼气销售、生物炭销售和碳信用额度中获利，投资回收期为 8.93 年。由于 RA-B 颗粒可以实现与减缓气候变化、保护人类健康和水生生物有关的可持续发展目标，未来的研究应侧重于了解负责 MEG 降解的微生物群，并确定不同的生物炭应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies