How to treat sewage in catering industry?

Recycling of contaminated waste

In advocating the development of circular economy today, as long as effective technology, management and scientific governance, we can make the sewage of the catering industry turbid and clear, and turn waste into treasure. In the discharged catering sewage, a large number of waste animal and plant oils are actually excellent chemical raw materials, which can be used to process industrial lubricants (butter), industrial detergents, leather softeners, quenching materials; Even manufacturing biodiesel, glycerin, etc.; All kinds of food residues, soup, etc., because of its rich nutrition, after disinfection, concentration and other processing can become a good feed additive; The sediment sludge can produce a good organic fertilizer, so that the environmental protection effect of recycling can be effectively achieved.

Therefore, the state promulgated the "Water Quality Standard for Sewage Discharge into Urban Sewers" (CJ 3082-1999) on September 11, 2015, and implemented it on August 1, 2016.

However, due to complex sewage composition, shortage of available sewage treatment sites, and low capital investment, the standard discharge and treatment of oily sewage in the catering industry has always been a big problem that cannot be solved. After years of research on feasible sewage treatment technology and operation plan, Shaanxi Huifeng Environmental Protection Equipment Co., Ltd. has conducted many years of practice and research on sewage treatment. The innovative introduction of integrated oil separation equipment, which can effectively solve the difficulties of catering sewage discharge and waste recycling functions.

1. Characteristics of catering sewage sewage discharged by catering units contains high concentrations of animal and plant oils, high concentrations of suspended matter and high concentrations of organic matter, among which there are various kinds of leftovers, rice, broken bones, sludge, sand and various kinds of debris discharged with sewage, large quantity, complex composition, most of them are organic substances. In addition to the oil which is difficult to degrade organic matter, there are water soluble pollutants such as salt, monosodium glutamate, sugar, gum, protein and starch in the wastewater after filter residue. After the removal of oil, BOD5/COD is about 0.45 ~ 0.62, and the biodegradability is relatively good. In addition, the discharge of catering sewage also has a large difference in the composition of sewage discharged in different catering units and different time periods, and the instantaneous flow is large.

2. Trapezoidal oil diversion device treatment technology Trapezoidal oil diversion device treatment technology is after long-term research and practice, specially used to treat the catering industry oily sewage environmental protection technology, the main function of the technical system is to implement the three-phase separation of oil and water slag, degrade COD indicators, so that the standard discharge. Comprehensive use of mechanical filtration method, gravity method, coalesce method, biofilm method, anaerobic biological filter method and other methods to strengthen the treatment of sewage, Xi 'an Environmental monitoring Center test shows that the treatment indicators have reached the standard requirements.

3. Use and maintenance services The technical facilities use electricity, without additional power, easy to operate, put into use, catering operators can operate and use according to the manual, and recycle waste oil sold to legal units. Caterers can also pay a small amount of maintenance costs, the daily cleaning, maintenance, repair, maintenance and other work of the facility all entrusted to professional environmental management company, by the professional environmental protection company's maintenance service team to carry out professional standard service, which brings great convenience to the catering industry, completely solve the hotel's worries.

4. Industrial use of waste animal and plant oil Due to the excellent oil separation effect of the trapezoidal oil diversion device treatment technology, most of the original waste animal and plant oil that is discharged into the sewer with sewage is completely separated and collected, and will be collected and disposed of by professional environmental protection companies. Under the supervision of government departments, it is strictly used for industrial purposes to prevent secondary pollution. It also controls the production of gutter oil from the source, thus ensuring the food safety and health of the people. 

The actual operation shows that the technology has fully achieved the requirements of good operation effect (high removal rate of animal and plant oil, suspended matter and COD), stable operation, small footprint, cheap price, convenient management and low operating cost. If customers can install and use this technology and use various systematic professional services, good economic, social and environmental benefits will be achieved.