Related Experiment Video
Updated: Apr 15, 2026

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation
Published on: July 13, 2012
Soil infiltration bioreactor incorporated with pyrite-based (mixotrophic) denitrification for domestic wastewater
Zhe Kong1, Lu Li2, Chuanping Feng1
1Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences, Beijing), Ministry of Education, No. 29 Xueyuan Road, Haidian District, Beijing 100083, China; School of Water Resources and Environment, China University of Geosciences (Beijing), No. 29 Xueyuan Road, Haidian District, Beijing 100083, China.
Abstract:
In this study, an integrated two-stage soil infiltration bioreactor incorporated with pyrite-based (mixotrophic) denitrification (SIBPD) was designed for domestic wastewater treatment. Benefited from excellent adsorption ability and water-permeability, soil infiltration could avoid clogging, shorten operating time and lower maintenance cost. Respiration and nitrification were mostly engaged in aerobic stage (AES), while nitrate was majorly removed by pyrite-based mixotrophic denitrification mainly occurred in anaerobic stage (ANS). Fed with synthetic and real wastewater for 120days at 1.5h HRT, SIBPD demonstrated good removal performance showing 87.14% for COD, 92.84% for NH4(+)-N and 82.58% for TP along with 80.72% of nitrate removed by ANS. TN removal efficiency was 83.74% when conducting real wastewater. Compared with sulfur-based process, the effluent pH of SIBPD was maintained at 6.99-7.34 and the highest SO4(2-) concentration was only 64.63mgL(-1). This study revealed a promising and feasible application prospect for on-site domestic wastewater treatment.
Related Concept Videos
Bioreactor Design and Operational System
Microbial Bioremediation of Uranium
Bioremediation
Bioreactor Controls-I
Bioreactor Controls-II
Environmental Applications of Microorganisms

