The main outputs of the sewage treatment plant for the slag, sludge, effluent, of which the production of slag is less, can be directly paved, brick-making. Sludge treatment affects the entire sewage treatment plant work, you can focus on anaerobic digestion of sludge; small and medium-sized sewage treatment plants can choose belt-type sludge filter press dewatering machine, which will greatly reduce infrastructure costs, reduce the footprint, convenient operation and management, but also can be stored to a certain amount of anaerobic digestion; with extensive land resources in the region can also be used to sludge drying beds, composting, land use and vegetation planting beds and other Low-cost sludge treatment system.
Two, the preferred treatment process.
The selection of sewage treatment process to a large extent determines the investment and operating costs of sewage treatment equipment, but also determines the amount of energy consumption and emissions of the equipment, so the selection of the process must be technologically advanced, high efficiency and low investment and operating costs, while energy consumption and emissions less, operation and maintenance of the characteristics of a simple.
Third, the use of efficient sewage treatment devices.
The power consumption of sewage treatment equipment in the operating costs generally accounted for about 40%, if the power-consuming equipment from the start, to take appropriate measures to improve the energy-saving will be promising. The power consumption parts of the equipment is mainly conveying pumps, aeration devices and other devices, including sewage lifting power consumption accounts for about 10% to 20% of the total energy consumption, lifting pumps facilities are mainly the first lifting pumps, sludge return pumps, residual sludge pumps, reflux pumps, as well as water lifting pumps; aeration system of the power consumption accounts for about 40% of the total energy consumption to 70% of the total energy consumption accounted for the vast majority of the total energy consumption. Oxygen transfer efficiency is related to the size of the bubbles, the depth of the reactor, the degree of turbulence of the liquid and the contact time between the bubbles and the liquid; in addition, the power consumption of other equipment also accounts for a large part. By taking reasonable energy-saving measures for these parts, it will greatly save the manpower, material and financial resources of the sewage treatment plant, and achieve the effect of energy saving and emission reduction.
Four, the use of harmless and efficient treatment chemicals.
General water treatment chemicals, including flocculants, coagulants, scale inhibitors, corrosion inhibitors, biocides, detergents, defoamers, decolorants and ion exchange resins, etc., mostly chemically synthesized organic polymer body. China's existing water treatment chemicals manufacturers, many types of products. The nature and concentration of pretreatment pollutants in the water, water temperature, pH, *** storage impurities and other factors **** with the decision of the selection and dosage of chemicals. But at the same time should also consider the high efficiency of the agent in order to minimize; consider its harmlessness, in order to prevent secondary pollution; consider its cheapness, in order to reduce operating costs.