Kitchen sewage refers to the sewage formed in the process of processing and consuming food in families, restaurants, hotels, canaries, etc., which often contains a large amount of leftovers, expired food, scraps, wastes and other wastes.At present, the treatment of kitchen sewage mainly focuses on landfill as domestic garbage after centralized collection. On the one hand, such treatment wastes recyclable resources in kitchen sewage, and on the other hand, the characteristics of kitchen sewage with high oil and salt are not suitable for landfill treatment.
The technical problem to be solved is to provide a kitchen sewage treatment method, which can recycle the kitchen sewage and avoid waste and environmental pollution.
The invention relates to a treatment method of kitchen sewage, which is to filter by precipitation after adding flocculant to kitchen sewage.After crushing and deodorizing, the filter residue is used to make fertilizer;After the filtrate is standing for 12 ~ 24 hours, the oil on the upper layer is collected, and the water on the lower layer is discharged after being disinfected by ultraviolet radiation.
In the above technical solutions:
Further, the deodorization process is as follows: add 10 to 20 grams of deodorant per cubic meter of material and mix it for 5 to 10 days. The deodorant is a microbial carrier loaded with a mixture of denitrifying microbial flora and EM microbial flora.
Further, the microbial carriers are vermiculite, sawdust and clay mixed with a weight ratio of 1:2 ~ 5:0.1 ~ 0.5, and pressed into granular form after adding aluminum chromium phosphate adhesive.
Described further, made into fertilizer process is: will the residue after deodorization treatment and crop straw mixed piled in 80 ~ 120 centimeters high stock pile, the residue after deodorization treatment and crop straw weight ratio of 100:50-80, heap dump when spraying EM bacteria agent in windrow outer layer and a 1 ~ 2 cm thick layer of diatomite, and then coated, control for 60 ~ 70 ℃ fermentation temperature, carbon and nitrogen ratio for 20 or less, fermentation in 10 ~ 20 days, with 0.01% ~ 0.1% of the crop straw weight copper sulfate after mixing with fertilizers.
Further, the flocculant is prepared from the following raw materials by weight: sodium silicate 1-5 parts, magnesium chloride 1-5 parts, ethanol 5-10 parts, polyacrylamide 1-5 parts, titanium tetrachloride 1-5 parts, diatomite 0.1-0.5 parts, aluminum sulfate 1-5 parts, water 10-20 parts, hydrochloric acid 0.1-0.5 parts.
Further, the preparation process of the flocculant is as follows: 1) mix sodium silicate and magnesium chloride in proportion, then add ethanol and stir evenly;2) mix and grind polyacrylamide, titanium tetrachloride, diatomite and aluminum sulfate into powder, and then add water to mix evenly;3) mix the products obtained in step 1) and step 2), and continuously add hydrochloric acid to stir evenly.
The beneficial effects of the invention are:
1) split the kitchen sewage from the source to avoid the problems of large water consumption, large treatment capacity and high treatment cost brought by centralized treatment, and realize the resource recycling and utilization of grease and filter residue, so as to realize the purpose of resource recycling and utilization;
2. After flocculation treatment with flocculant, the precipitation is used to prepare fertilizer. The flocculant has special composition, which not only has flocculation effect, but also can add trace elements to the fertilizer of the following steps.