含盐量对好氧颗粒污泥形成过程的影响

研究了不同含盐梯度废水下好氧颗粒污泥的形成过程.在反应器 R1 中,其含盐量一直维持 1%,其颗粒成中空结构;在 R2、R3 中,其含盐量由 1%提高到 2.5%时,其颗粒发生膨胀破碎;在 R3 中,其含盐量由 2.5%提高到 5%时,其颗粒由疏松变为密实.另外,溶解氧消耗速率(SOUR)随着含盐量的增加而降低.在含盐量为 2.5%时,好氧颗粒污泥的耐盐菌与非耐盐菌均处于不利的生长环境,此时好氧颗粒污泥处于最不稳定的状态,容易发生解体.

Influence of sodium chloride on formation of aerobic granules

The formation of aerobic granular sludge was studied using different sodium choride concentrations in the substrate. Granules in R1, where the salinity remained at 1% exhibited the inner holes of granules. In R2 and R3, when the salinity increased from 1% to 2.5%, disintegration of granules was observed. However, in R3, when the salinity increased from 2.5% to 5%, the disintegration stopped, the granules became more compact. The disintegration of granules under the salinity of 2.5% may be due to the abominable conditions both for halo tolerant and non halo tolerant bacteria.