Improving Wastewater-treatment Wetlands by Exogenous Carbon Earthworms

• Published in: Guanʻgai paishui xuebao Vol. 42; no. 2; pp. 117 - 122
• Main Authors: HAO Yiting, GAO Feng, MA Huanhuan, MA Tian, HU Chao, LIU Chuncheng, CUI Erping
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01-02-2023
• Subjects: aquaculture wastewater; carbon source; children love worms; constructed wetland
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2022299

【Objective】 Constructed wetland is a biotechnological technique to treat wastewater; its function depends on a multitude of biotic and abiotic factors. This paper compares the performance of eight wetlands constructed by different materials. 【Method】 The eight wetlands we studied were constructed by fine sand only (CK), fine sand + corn straw powder (JW), fine sand + industry glucose (PW), sand + corn-straw biochar (SW), fine sand + eisenia fetida (KQ), fine sand + corn straw powder + eisenia fetida (JQ), fine sand + industrial glucose + eisenia fetida (PQ), fine sand + corn stover biochar + eisenia fetida (SQ), respectively. 【Result】 Adding corn-straw biochar, industrial glucose and corn-straw power increased the COD removal rate by 81.80%, 88.58% and 85.77%, respectively, compared to CK. Adding industrial glucose combined with corn straw powder improved purification efficiency of total N (TN) and total P (TP) by 7.0% and 2.8%, respectively. Wetland with industrial glucose and corn straw powder had the best