Enzymatic pre-treatment for enhancement of primary sludge fermentation

被引：36

作者：

Bahreini, Gholamreza ^{[1
]}

Nazari, Laleh ^{[2
]}

Ho, Dang ^{[3
]}

Flannery, Christopher C. ^{[4
]}

Elbeshbishy, Elsayed ^{[5
]}

Santoro, Domenico ^{[2
,6
]}

Nakhla, George ^{[1
,2
]}

机构：

[1] Western Univ, Dept Civil & Environm Engn, London, ON N6A 5B9, Canada

[2] Western Univ, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada

[3] Suez Water Technol & Solut, Oakville, ON L6M 4B2, Canada

[4] Novozymes Biol Inc, Salem, VA 24153 USA

[5] Ryerson Univ, Civil Engn Dept, Toronto, ON M5B 2K3, Canada

[6] Trojan Technol, London, ON N5V 4T7, Canada

来源：

BIORESOURCE TECHNOLOGY | 2020年 / 305卷

关键词：

Enhanced fermentation; Enzymatic pre-treatment; Rotating belt filter; Primary clarifier; Biological nutrient removal; VOLATILE FATTY-ACIDS; WASTE ACTIVATED-SLUDGE; ACIDOGENIC FERMENTATION; SEWAGE-SLUDGE; FOOD WASTE; RECOVERY; REACTOR; WATER; TEMPERATURE; PERFORMANCE;

D O I：

10.1016/j.biortech.2020.123071

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This research showed the interrelated impact of cellulase enzyme, temperature, and SRT on enhancement of primary and rotating belt filter (PS, RBF) sludges fermentation. SRTs of 1, 2, and 4-days were tested at 25 degrees C and 35 degrees C. Enzymatic enhancement was examined using three different doses of enzyme (i.e. 0.5%, 1%, and 1.5% of the total solids in the feed). The results showed a positive impact of enzyme dose as well as temperature and SRT on VFA and soluble COD production. For the RBF sludge, enzyme addition enhanced the VFA yield of fermentation at room temperature (25 degrees C) from 52-103 mgCOD/g VS to 93-188 mgCOD/g VS, as compared with increase from 78-192 to 87-202 mgCOD/gVS in PS. Intensification of the fermentation process, particularly for the cellulose-rich RBF sludge, by enzyme addition confirms process viability as an alternative to the extraneous carbon sources for biological nutrient removal in wastewater treatment plants.

引用

页数：10

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