Comparison of multi-enzyme and thermophilic bacteria on the hydrolysis of mariculture organic waste (MOW).
Mariculture organic waste (MOW) is rich in organic matter, which is a potential energy resource for anaerobic digestion. In order to enhance the anaerobic fermentation, the MOW was hydrolyzed by multi-enzyme and thermophilic bacteria. It was advantageous for soluble chemical oxygen demand (SCOD) release at MOW concentrations of 6 and 10 g/L with multi-enzyme and thermophilic bacteria pretreatments. For multi-enzyme, the hydrolysis was not obvious at substrate concentrations of 1 and 3 g/L, and the protein and carbohydrate increased with hydrolysis time at substrate concentrations of 6 and 10 g/L. For thermophilic bacteria, the carbohydrate was first released at 2-4 h and then consumed, and the protein increased with hydrolysis time. The optimal enzyme hydrolysis for MOW was determined by measuring the changes of SCOD, protein, carbohydrate, ammonia and total phosphorus, and comparing with acid and alkaline pretreatments.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China E-mail: geletu@ouc.edu.cn; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China and Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, China.
Liang
L
Guo
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China E-mail: geletu@ouc.edu.cn.
Mei
M
Sun
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China E-mail: geletu@ouc.edu.cn.
Yan
Y
Zong
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China E-mail: geletu@ouc.edu.cn.
Yangguo
Y
Zhao
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China E-mail: geletu@ouc.edu.cn.
Mengchun
M
Gao
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China E-mail: geletu@ouc.edu.cn.
Zonglian
Z
She
D000641:Ammonia; D000693:Anaerobiosis; D017756:Aquaculture; D001419:Bacteria / Q000145:classification / Q000201:enzymology*; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D004798:Enzymes / Q000737:chemistry / Q000378:metabolism*; D005285:Fermentation; D015964:Gene Expression Regulation, Bacterial / Q000502:physiology; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007220:Industrial Waste; D010758:Phosphorus; D013696:Temperature; D013997:Time Factors
D004798:Enzymes; D007220:Industrial Waste; D010758:Phosphorus; D000641:Ammonia