Mould Contamination Experimental Study in Public Building Environment

Xin Zhang,Guojie Chen,Yaqian Huang,Huaihao Wang,Xuanhao Ran,Lijiao Tang

doi:10.1051/e3sconf/201911804004

Abstract

This paper is aimed at the experimental study on mould contamination status. Mold contamination has seriously threatened residents’ physical and mental health and buildings. However, few experimental studies on mold contamination was made in the built environment under hot and humid climate. We firstly prepared the Sabaurauds agar(SAB) with reference to the national standard and set sampling points by the five-point sampling method in a classroom of USC. Then, we cultured the sample in 28 °C constant temperature condition, counted mould number with plate counting method and referred to the Omeilianski formula to calculate indoor mould concentration. The study found that the average concentration of mould spore in the typical public building was 629cfu/m3, and the exceeding rate was up to 25.8%. The results show that the typical public building environment in Hengyang has serious mould contamination, thus further environmental optimization research is urgently needed.

Highlights

With the rapid development of China's construction industry in recent years, building environment problems have become increasingly prominent, among which mould contamination is a key problem, especially in the humid and hot climate areas in south China
The counting method was in accordance with the plate counting method in GB/T 18204.4-2013 EMPP [12]
No.3 and No.4 sampling points are close to the corridor and ventilated, and the results show that No.3 and No.4 have a small number of mould colonies

Summary

Introduction

With the rapid development of China's construction industry in recent years, building environment problems have become increasingly prominent, among which mould contamination is a key problem, especially in the humid and hot climate areas in south China. The humid and hot climate in the south provides favorable conditions for mould breeding. Mould contamination in building environment has a detrimental effect to buildings and residents. Long-term exposure to mould environment can cause respiratory diseases and allergic symptoms, such as bronchitis, asthma and allergic pneumonia. For the elderly and children with low immunity, mould may cause headache, fever, inflammation of skin or mucous membrane and other diseases [5]. The mycotoxin produced by mould in the process of metabolism is more harmful to human body and damages human nervous and immune system

Objectives

Findings

Conclusion