Anaerobic Co-Digestion of Sewage Sludge and Waste in High Solid State

Journal of Ecological Engineering

Ahmed I. Marie¹  Rehab El-hefny¹  Ahmed M. Aboulfotoh² 

[1] Environmental Engineering Department, Faculty of Engineering at Shubra, Benha University, Fareed Nada Street, Benha, Qalubiya Governorate, Egypt;Environmental Engineering Department, Faculty of Engineering, Zagazig University, 44519 Ismailia,El-Zakazik Rd, Shaibet an Nakareyah, Zagazig 2, Ash Sharqia Governorate, Egypt;

关键词: sludge;    food waste;    waste;    anaerobic co-digestion;    hydrolysis;    thermal pretreatment;   

DOI  :  10.12911/22998993/147835

来源: DOAJ

【 摘 要 】

In this study, the effect of thermal pre-treatment (TP) on the physical characteristics and co-digestion of a mixture of food waste and sludge was investigated. The food waste (FW) to sewage sludge (SS) ratio used in this research is 1:2 (VS-based) to form a final concentration of 11.20%. The inoculum to substrate ratio was set at 1:1 (Volume-based). Undoubtedly, the results show that TP has changed the physical characteristics of the food waste to sewage sludge mixture. The results show that the pretreatment increased the biogas production from 4385 ml for the untreated reactor (RB) to 5685 for the reactor R2(140) at 140°C and the improvement in biogas production reaches 29.65% in the reactor R2(140) and the removal of volatile solids was 58.90%. Therefore, after the biomethane potential test, the temperature of 140°C was found to be optimal in the production of biogas. The optimal condition is to use a mixture of pre-treated SS at the temperature of 140°C and untreated FW, so TP is recommended to be used in anaerobic digestion of the mixture of food waste and sewage sludge.

【 授权许可】

Unknown