Study on the efficiency of low-load tillage wetland for purification of village sewage

doi:10.14088/j.cnki.issn0439-8114.2019.24.015

Abstract

Abstract: Low-load cultivated paddy field wetland was constructed by using paddy fields in the south, and the removal laws of COD, total phosphorus, ammonia nitrogen, total nitrogen and other pollutants under different hydraulic loads （HLR） in rice growth cycle were investigated. Fuzzy comprehensive evaluation method was used to evaluate the drainage quality of paddy field. The results showed that the purification effect of the plant increased 4%~13%; When the hydraulic load was 0.065 m³/（m²·d）, the removal rate of COD, total phosphorus, ammonia nitrogen and total nitrogen was 47.3%、84.0%、80.0%、68.5%, respectively. The fuzzy comprehensive evaluation shows that the drainage quality of paddy field is better than that of the Pollution discharge standard of urban sewage treatment plant in the GB18918-2002 of general rural sewage facilities.

Key words: tillage type wetland, nitrogen and phosphorus, paddy field, hydraulic load（HLR）

CLC Number:

X703

WANG Yi-chao, CHEN Wei-yong, SU Peng, ZHANG Wen-yi. Study on the efficiency of low-load tillage wetland for purification of village sewage[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(24): 63-67.

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