将反相发酵应用于初沉污泥、二沉污泥和混合污泥时，可溶性化学需氧量和铵的差异。

Differences in soluble COD and ammonium when applying inverted phase fermentation to primary, secondary and mixed sludge.

作者信息

Negral L, Marañón E, Castrillón L, Fernández-Nava Y

机构信息

Department of Chemical and Environmental Engineering, University Institute of Industrial Technology of Asturias, Campus of Gijón, University of Oviedo, 33203 Gijón, Spain E-mail:

出版信息

Water Sci Technol. 2015;72(8):1390-7. doi: 10.2166/wst.2015.351.

DOI:10.2166/wst.2015.351

PMID:26465310

Abstract

Primary, secondary and mixed sludge were treated by inverted phase fermentation. This treatment results in solid-liquid separation of sludge after endogenous enzymatic hydrolysis (anaerobic conditions: 42°C, 48 hours). The soluble chemical oxygen demand (sCOD) was increased in the solid phase up to 1,800%, 21,300% and 260% in primary, secondary and mixed sludge, respectively. The corresponding increase in sCOD in the liquid phase accordingly reached values of up to 440%, 5,100% and 140%. Phase separation led to an enrichment of volatile solids in the solid phase (89-358% primary sludge, 80-102% secondary sludge and 29-133% mixed sludge). The NH4+-N values increased notably after the endogenous enzymatic hydrolysis itself. To investigate the short-term evolution following the treatment, the variation in sCOD, NH4+-N and solids was also monitored after keeping the hydrolysate at 37°C under anaerobic conditions for 24 hours. This stage showed no generalized pattern in terms of sCOD.

摘要

对初沉污泥、二沉污泥和混合污泥进行了反相发酵处理。该处理在内源酶水解后（厌氧条件：42℃，48小时）实现了污泥的固液分离。在初沉污泥、二沉污泥和混合污泥中，固相中的溶解性化学需氧量（sCOD）分别增加了高达1800%、21300%和260%。液相中sCOD的相应增加量分别达到440%、5100%和140%。相分离导致固相中的挥发性固体富集（初沉污泥为89 - 358%，二沉污泥为80 - 102%，混合污泥为29 - 133%）。内源酶水解后，NH₄⁺ - N值显著增加。为了研究处理后的短期演变情况，还在厌氧条件下将水解产物在37℃保持24小时后，监测了sCOD、NH₄⁺ - N和固体的变化。在sCOD方面，该阶段未呈现出普遍规律。