Scholarlink

<p>High BOD content in domestic wastewaters impact water effluent quality and minimizes oxygen availability utilized by aerobic bacteria to break organic matters (OMs). This study analyzes the characteristics and biodegradability of OMs associated with quality parameters, including oxygen demand or dissolved oxygen (DO), BOD, and COD. Existing OMs concentrations, molecular weights, and corresponding oxidation reactions were considered to find ThOD (mg O<sub>2</sub>/mg Substrate). Results showed that VFAs require twice as much O<sub>2</sub> as sugars, confirmed by the 50% increase in VFAs COD, TOC, and BOD. Total organic carbon was estimated to be TOC<sub>t</sub> = 365&#xa0;mg&#xa0;C/L, whereas those available constitutes were found to have BOD<sub>5</sub>, CBOD, NBOD, and UBOD around 485, 845, 89, 934&#xa0;mg&#xa0;O<sub>2</sub>/L, respectively. Perfect symmetries were found between the [CBOD] and [DO] for OMs by applying a proposed model for BOD balance, with fibers and inorganics requiring fourfold DO, as compared to sugars. Errors ranged from 10 to 15%, primarily due to differences in model inputs. Specific errors were 12.7% for BOD<sub>5</sub>, 12.5% for CBOD, 14% for NBOD, and 14.7% for UBOD. The analysis demonstrates how the established models bridge the gap between scientific research and industry practices, facilitating better control of organic and inorganic contamination in domestic wastewater.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Oxygen uptake of organic matters correlated to ThOD of carbonaceous and nitrogenous compounds in domestic wastewaters

  • 期刊论文

  • 发表日期：

    2025年2月10日

查看全文
  • H. A. Maddah

摘要

High BOD content in domestic wastewaters impact water effluent quality and minimizes oxygen availability utilized by aerobic bacteria to break organic matters (OMs). This study analyzes the characteristics and biodegradability of OMs associated with quality parameters, including oxygen demand or dissolved oxygen (DO), BOD, and COD. Existing OMs concentrations, molecular weights, and corresponding oxidation reactions were considered to find ThOD (mg O2/mg Substrate). Results showed that VFAs require twice as much O2 as sugars, confirmed by the 50% increase in VFAs COD, TOC, and BOD. Total organic carbon was estimated to be TOCt = 365 mg C/L, whereas those available constitutes were found to have BOD5, CBOD, NBOD, and UBOD around 485, 845, 89, 934 mg O2/L, respectively. Perfect symmetries were found between the [CBOD] and [DO] for OMs by applying a proposed model for BOD balance, with fibers and inorganics requiring fourfold DO, as compared to sugars. Errors ranged from 10 to 15%, primarily due to differences in model inputs. Specific errors were 12.7% for BOD5, 12.5% for CBOD, 14% for NBOD, and 14.7% for UBOD. The analysis demonstrates how the established models bridge the gap between scientific research and industry practices, facilitating better control of organic and inorganic contamination in domestic wastewater.

Graphical abstract