(1) Comparison of electroplating wastewater treatment process
At present, in the domestic electroplating industry, electroplating wastewater is treated by the park's investment and purchase of equipment for centralized treatment. The electroplating wastewater after treatment reaches the national third standard, and the cost of water treatment is 120 yuan / ton.
Internationally, wastewater from the electroplating industry in Yantai is usually treated on the production line. Our philosophy is to change from the original chemical decomposition method to the selective passing method, that is, only water can pass through the equipment, and other substances are intercepted and reused. The equipment investment cost is low, and the small volume basically does not require special management. The waste water is processed on-line, which not only enables the waste water to be treated in a timely manner and meets the national third standard, but also enables the waste water to be recycled and used for the secondary recovery of useful heavy metals.
(2) Analysis of Hanno's online processing advantages
The electroplating wastewater treatment method adopted by Hannover is an international online treatment method, which has the following advantages:
① Low cost
Centralized sewage treatment costs 120 yuan per ton, while online treatment only costs 30 yuan per ton.
② Small footprint
The centralized treatment of electroplating wastewater in Yantai requires the unified construction of the park. The daily treatment scale is 1200 tons, and the sewage treatment plant covers an area of about 7,500 square meters. The online treatment is based on the daily treatment scale of 100 tons. square.
(3) Benefit analysis
Hanno's online treatment, Yantai electroplating wastewater treatment costs only 30 yuan per ton, we take the daily treatment of 100 tons of electroplating cleaning wastewater as an example (calculated in 288 days of annual production days) for benefit analysis, annual sewage treatment fee of 2.304 million Compared with the centralized processing in the park, 1.152 million yuan was saved.
(4) Cooperation model
① Sale of sewage treatment equipment and additives
② Sewage treatment fee is charged, and equipment and additives are provided free of charge.