The Open Fuels & Energy Science Journal

2015, 8 : 77-80
Published online 2015 March 31. DOI: 10.2174/1876973X01508010077
Publisher ID: TOEFJ-8-77

Research on Feasibility of Mesophilic Anaerobic Digestion of Mixture of Grass Cutting’s from Greenings and Sludge from Wastewater Plants

Xie Jinliang , Zhu Tongqi , Du Hao , Hu Xiaoli and Wang Ye
School of Environmental & Municipal Engineering, Qingdao Technological University, Qingdao 266033, China.

ABSTRACT

This paper studies the feasibility of joint digestion processing of grass cuttings from city greening and sludge from wastewater plant and selects respectively 10%, 20%, 30%, 40% and 50% dry weight percent for grass cutting’s and sludge. The experimental results indicate that the gas production rate of the sludge digestion system will grow with growth of added grass cuttings. When the percentage of added grass cuttings is 50%, the gas production rate of the digestion system can reach 348 L/kg.TS, compared to the value without grass cutting. The gas production rate increases by 30%. Therefore, the joint digestion processing of the grass cuttings from sludge of wastewater plant is feasible.

Keywords:

Gas production rate, lawn grass cuttings, mesophilic digestion, sludge.