The Experiment Of Anaerobic-Aerobic Waste-Water Treatment Of Cities And Towns

In present dissertation, research work target on reducing the cost of living waste-water treatment came from cities and towns was carried out using anaerobic biological filter - aerobic aeration continuous treatment method. Experiment upon various waste-water which came from campus living, brewery malt processing, animal slaughtering and aquatic product processing was devised and conducted. Based on result analysis, the decrement of COD of campus living waste-water may exceed 80% after 6h of anaerobic biological filter treatment and 1h of continuous aerobic aeration, which satisfied the standard of national waste-water discharging.Down stream anaerobic biological filter where waste-water poured from top was used as anaerobic processing device in which bacteria colloid was found on padding in biological membrane form. Sampling holes designed to analysis the characteristic of different altitude water was opened on the filter in which slag with diameter of 5mm~10mni was used as padding.Reaction pool, subsidence pool and sludge renew pool was designed in aerobic processing device, in which gas-lift unit was used to lead sludge reflux from subsidence pool to renew pool. In this device, underwater pump can be cut down to reduce power consume. The probability of sludge expansion was also reduced because of the adsorption-renew technique.Benefit from the anaerobic biological filter-aerobic aeration combination treatment, the capacity of waste-water treatment was raised and the time of aerobic processing was reduced. This method also extends the adaptability of various kind of waste-water, which can greatly cut down the cost of waste-water treatment by reducing the power consumption.Deodorization bacteria were added into the anaerobic filter to reduce the foul smell production in anaerobic process, and to avoid secondary smell pollution in the treatment process. Superior bacteria were added into the aerobic reaction pool to advance the nitrification reaction which saves the aerobic process time and reduces the cost of waste-water treatment while keeping the dislodge rate of ammonia and nitrogen.