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Related Experiment Video

Updated: Jul 12, 2026

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation

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Published on: July 13, 2012

Simultaneous organic stabilization and nitrogen removal in multi-stage biodrum system.

C Chiemchaisri¹, C Liamsangoun

¹Department of Environmental Engineering, Kasetsart University, Chatuchak, Bangkok 10900, Thailand. fengccc@ku.ac.th

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|November 13, 2004

Summary

This study optimized domestic wastewater treatment using a biodrum system, finding a 6-hour hydraulic retention time (HRT) maximizes organic and nitrogen removal. Lower speeds require more stages for similar effluent quality.

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Area of Science:

Environmental Engineering
Water Treatment Technologies
Bioreactor Design

Background:

Domestic wastewater treatment requires efficient organic stabilization and nitrogen removal.
Biodrum systems offer a potential solution for advanced wastewater treatment.
Optimizing operational parameters is crucial for maximizing system performance.

Purpose of the Study:

To evaluate the performance of a multi-stage biodrum system for domestic wastewater treatment.
To investigate the impact of hydraulic retention time (HRT) and rotational speed on organic and nitrogen removal efficiencies.
To determine the optimal HRT and rotational speed for effective wastewater treatment.

Main Methods:

A multi-stage biodrum reactor was employed for domestic wastewater treatment.
Experiments were conducted at varying hydraulic retention times (12, 6, and 3 hours).
Biodrum rotational speeds were tested at 2, 4, and 8 revolutions per minute (rpm).

Main Results:

Average organic removal efficiencies ranged from 90.9% to 96.3% across different HRTs.
Average nitrogen removal efficiencies varied from 81.0% to 91.5%.
An optimal HRT of 6 hours was identified; rotational speed significantly impacted nitrogen removal at lower HRTs.

Conclusions:

A 6-hour HRT is optimal for the biodrum system, achieving high organic and nitrogen removal.
While effluent nitrogen concentrations were similar across speeds, lower speeds required more biodrum stages.
The biodrum system demonstrates effective domestic wastewater treatment, with optimized HRT and rotational speed crucial for performance.