Pharmaceutical and chemical wastewater including pharmaceutical intermediates, pesticide intermediates, antibiotics, etc. has characteristics of high toxicity, high nitrogen, high phosphorus, high salinity, and high COD. Usually, the nutrient source required by microorganisms is seriously unbalanced, and sludge expansion is particularly likely to cause secondary sedimentation tank Running mud, the long hydraulic retention time leads to increased capital investment costs, long process flow, high-end oxidation of Fenton and electrocatalysis at the front end, and ozone oxidation and drugization at the back end, leading to a huge increase in hazardous waste, high processing costs, and general water intake It can only reach about 40% of the designed amount.
Customize the production of inoculants and carriers based on actual field data, re-form the C: N: P (carbon-nitrogen-phosphorus) ratio, and solve the nutritional imbalance required by the microorganisms. The process flow can also be greatly reduced (in addition to the original poison such as high cyanide content), advanced oxidation (Fenton, electrocatalytic ozone) and other processes are reduced, and the generation of hazardous waste is greatly reduced. At the same time, the problem of not reaching the original designed water volume was solved.
Plant liquid deodorants can effectively decompose malodorous gas molecules such as ammonia, organic amines, sulfur dioxide, hydrogen sulfide, and methyl mercaptan in malodorous environments. Certified by the Chemical Testing Center and the Safety Production Inspection Center, it is non-explosive and non-flammable dangerous goods; non-oxidant and non-corrosive; non-toxic.
Plant-type deodorant refers to deodorant processed with plant extract or plant extract as the main raw material. This product is harmless to humans and animals, non-toxic, and harmless to soil and plants. Non-flammable and explosive, free of Freon and ozone, safe to use.
Growth of mud age: Use of recommended technologies can lengthen the mud age of biochemical systems. The total mud age of biochemical aerobic ponds in the textile printing and dyeing industry can be controlled above 80 days; the total mud age of aerobic ponds in the papermaking industry can be controlled above 70 days; The total mud age of the biochemical aerobic pond in the industry can be controlled above 150 days; the total mud age of the biochemical aerobic pond in the food industry can be controlled above 120 days; the total mud age of the biochemical aerobic pond in the brewing industry is controlled above 160 days; the leather industry has good biochemical The total mud age of the oxygen pond is controlled above 180 days.
A large-scale sewage treatment plant with a daily processing design capacity of 150,000 tons / d in a papermaking enterprise has three major problems with the original process: the papermaking enterprise has a high COD and the impact on the biochemical system; when the summer temperature exceeds 38 ° C, Impact on the biochemical system; the daily processing capacity is 60,000-70,000 tons / d, and the daily water flow index is unstable.
Sludge reduction: When the treatment capacity is significantly enhanced, the amount of treated substances such as COD, BOD, NH3-N, TN, TP, etc. in the wastewater is very low, and a large number of protozoa such as bellworms, rotifers, etc. appear. The total sludge volume of endogenous consumption of microorganisms produced by the mediation of DO has also decreased significantly. Biochemical sludge can be reduced by more than 80% in dozens of cases in six industries.
Using biochemical system synergy technology, compound methanogens, compound COD bacteria, and bio-enhanced carriers were added to the anaerobic section (UASB or IC) reactor. Due to toxicity problems, the first 7 days to kill the enemy The method of loss 600 allows the added microorganisms to first adapt to the water environment, establish a preliminary biosphere, and then continue to add bacteria and carriers. Generally, it takes 45-60 days to complete the formation of methane and anaerobic granular sludge. It has the characteristics of fine molecularization of open-loop broken bonds and stable anaerobic system. At the same time, the biochemical indicators of the facultative and aerobic stages are improved, and high MLSS and MLVSS counteract pharmaceutical and chemical and high wastewater with high concentrations.
The total nitrogen problem requires a denitrification section at the site of the sewage station. If the old sewage station does not have a denitrification section, then a denitrification section must be created in the facultative or aerobic section, and the recommended technique is used to form the nitrifying mixture. , Mixed into the denitrification zone, the ratio of the nitrification solution entering the denitrification zone can be controlled between 1: 200-300, and the HRT of the denitrification zone is controlled within 3.5-8 hours, specifically adjusted according to the TN concentration and emission standards, compared with ordinary activated sewage The denitrification effect of the mud denitrification section or the biological filter and the contact oxidation pond is more significant, which provides favorable conditions for the creation and transformation of denitrification in old sewage treatment stations. After hanging the film successfully, the total nitrogen removal rate is between 65% -85%, depending on the industry and the total nitrogen concentration.