cotton and cotton blend fabric plants produce high volumes of wastewater relatively low in organic load. the usual method of wastewater treatment is a combination of an aerobic and chemical system. by segregating and treating this warm stream by anaerobic filters the total treatment cost could be drastically reduced wastewater from such processes was successfully treated in an upflow anaerobic filter. in order to design a full-scale anaerobic filter a study was undertaken to determine the appropriate media for optimum performance. 7 refs