TW588019B - Method for treatment of waste water by contacting activated sludge with sarcosine compounds - Google Patents

Abstract

The purpose of the present invention is to provide a treating method of waste water which enables forming activated sludge which allows excellent sedimentation and satisfactory treated water quality and reducing the amount of excess sludge generation. Sarcosine compounds are brought into contact with the activated sludge.

Description

588019 V. Description of the invention (1) [In the facility of the invention to which the invention belongs, the activated sludge that is shaped is easier to be treated. [The conventional technology to generate the amount of wastewater produced by the prior treatment of wastewater is added to the activated sludge and saved 7,1996) ° Various types of activated sludges are set on the rear section of polymer-based inorganic system Ning No. 5-253589. The Vol · 21 Ecological Research Society mentioned above produces waste sludge. However, its technical field is about Seeking Wastewater Treatment Alchemy] Let's add a medium, a pre-form technology, a universal energy source of sludge ", Tian Tian, Additive Bulletin as an aggregating agent, etc.]. Then set up digestion tank, dirt in mud method, No. 2, 1997, microbiology method, for the amount of energy, try and may not be economically applicable. It also has the ability to reduce the capacity of sludge, but it can not reduce the sludge aggregation in industrial wastewater treatment facilities and public wastewater treatment, and it has excellent sedimentability to reduce the amount of excess sludge generated and maintain good tube formation activity. What is known in sludge and reduction of residual sewage is the method of using microbial agents or enzymes, [for example, "microbial treatment of Chinese opera, Dai Rongyi, energy saving, V 〇 1. 4 8, reduction of residual sludge Method, using organic flocculant or polyaluminum chloride as the method, [for example, Japanese patent special; = 1 Lu 'through the thin film method or the active, to reduce sludge "[" Deficiency of mud / Ni-Ni production ", Hao Xiong Xiong, monthly publication Shimonoseki or" make changes and control "micro-ecology of water 1 1, Institute of Publishing Center]. In order to maintain good microbial activity, and to reduce the use of microbial agents or enzymes, etc. to obtain the desired effect, there are a variety of high-molecular agglutinating agents, etc. to produce a variety of ferries, and improve the deposition The stop of features, the amount of mud produced by J 5 cannot be mentioned.

588019 V. Description of the invention (5) The reduction rate of the remaining sludge in the tank, and the sedimentability and BOD removal rate of the sludge indicated in the SVI index, in order to obtain the information about the dryness of the tiles and make the investigation Impact on wastewater treatment capacity. The test results described above are shown in Table 丨 'As a result of the addition of muscles, the residual sludge can be greatly reduced. s ^ he bet on minus). In addition, the intimacy of sludge can be improved, and the removal rate of B 0 D is also covered; Shihuai, γgan also meets the standards, and Yake understands that there is no obstacle to the wastewater treatment function. Table 1 Reduction rate of additive residual sludge (° / 〇) SV I (m 1 / g) B 0 D removal rate (%) Sarcosine 35 152 97 Sodium sarcosine 33 155 ------ 98 muscle Amino acid hydrochloride 28 150 98 None 161 97 [Example 2] ---------- In the first embodiment, the concentration of sodium sarcosine added to the sludge weight of the aeration tank, per 1 Table 2 shows the results of adding waste water at daily ratios of 0.01 and 5% by weight. According to the results of this test, when the added concentration is 0.011% by weight, the remaining sludge is only slightly reduced, and when the added concentration is less than 0.01% by weight, a good addition effect cannot be expected. On the other hand, it was found that the addition amount of 5% by weight had a significant sludge reduction effect, but the BOD removal rate was slightly reduced. Therefore, if it exceeds 5% by weight, the performance of the wastewater treatment is lowered, which is not preferable. ,

V. Description of the invention (6) Table 2

Example 3]

Sludge reduction rate SVI (ml / g) BOD removal rate (%)-~~~~ ---- (° / 〇) ______ 160 97 33 ---- ~-~~ -1-155 98 42 150 90 1 161 97 Salty low residual sludge test. In the same factory treatment, "the operating conditions are based on the water volume of 1000 m3 / said, the volume of the aeration tank is 1000 m3," the Shen Dian trough is 600 m3, and the heart% is 500. 〇 [11§ / 1, b〇d The sludge load was 0.220 ~ 0.25 kg-BOD / kg-SS. The test period was 4 months, and the surface of the noodles was investigated for 2 months 'without the addition of sarcosinate, and the next 2 months' was administered once a week at a rate of sarcosine in the aeration tank sludge 30 kg of 1% by weight is added to the aeration tank to compare the treatment status of wastewater before and after the input. The above test results are shown in Table 3. The amount of dehydrated lumps was reduced to 27% after the injection. In addition, the processing capacity of BOD removal and the like and the sludge depositability tend to be significantly improved. C: \ 2D-CODE \ 90-06 \ 90106617.ptd Page 9 588019 V. Description of the invention (7) Table 3 Before analysis of the project's pharmaceutical input (2 months after the pharmaceutical input (2 months 1)) __ Inflow water treatment water Removal rate Inflow water treatment water removal rate_ pH 7.3 7.4 7.3 7.3 BOD (mg / 1) 940 26 97.2 950 15 98.4 COD (mg / 1) 320 25 92.2 380 19 95 MLSS (mg / 1) 5200 5100 SV30 (%) 98 88 SVI (ml / g) 188 173 Dehydrated block production (kg / day) 4800 3500 (reduction rate 27.1%) Dehydrated block water content (%) 87.8 85.5 Dehydrated block solid content (kg / day) 586 508 BOD sludge change rate (%) 62.3 53.4

(Note) Change rate of B0D sludge: solid content of dehydrated block / B0D of inflow water [Example 4] Inflow water volume is 8 0 0 0 m3 / day, aeration tank volume is 3 0 0 0 m3, and MLSS B0D sludge with a load of 2 0 0 0 mg / l and a load of 0.2 kg-B0D / kg-SS were run in a sewer treatment plant. Sodium sarcosine was added to the aeration tank sludge at a weight of 0 · 1 per day. The ratio of weight% is continuously added to the sludge return line by means of a fixed-rate pump. Table 4 shows the results of comparing the wastewater treatment status for each two months before and after the administration of sodium sarcosinate. According to the test results obtained, it has obvious effects of reducing the remaining sludge.

C: \ 2D-CODE \ 90-06 \ 90106617.ptd Page 10 588019 V. Description of the invention (8) In addition, before and after the dosage of the agent, observe the activated sludge phase with a microscope, there are fewer filamentous bacteria and radiation ii after the dosage. On the other hand, benign metazoans and protozoa such as ph 丨 1 〇 ^ 丨 na and vorti cel la have proliferation phenomena. That is, as a result of the addition of sarcosine, it can be known that in the wastewater treatment, due to the proliferation of useful higher-order microorganisms, the predation effect of activated sludge can be enhanced, and the reduction of excess sludge can be promoted. Table 4 Analysis project before pharmaceutical input (2 months after pharmaceutical input (2 months) Inflow water treatment water removal rate Inflow water treatment water removal rate pH 6.8 7 6.8 7 BOD (mg / 1) 150 5 96.7 165 4 97.6 C0D (mg / l) 125 4 96.8 133 4 97_ MLSS (mg / l) 2000 1900 _ SV30 (%) 26 24 _ SVI (ml / g) 130 126 _ Dehydrated mass production (kg / day) 5210 3880 (Reduction rate 25 _—- Dehydrated block moisture content (%) 79.5 78.1 Dehydrated block solid content (kg / day) 1068 850 (Reduction rate 20.4@i_ Philodina-vort icel la + _ + + _ — Epi stylis +. + + + A radioactive bacterium 3) + — _ —- — filamentous bacteria (021N) + (Note)-not found + less + + more + + + quite a lot

C: \ 2D-CODE \ 90-06 \ 90106617.ptd Page 11 588019 V. Description of the invention (9) [Effects of the invention] According to the method of the present invention, the activated sludge is brought into contact with sarcosine compounds. As a result of the increase in predation, the capacity of wastewater treatment can be improved. In addition, the amount of excess sludge can be reduced drastically, and the maintenance and management of wastewater treatment equipment is easier, and the cost of maintenance and management can be greatly reduced .

C: \ 2D-raDE \ 90-06 \ 90106617.ptcl page 12 588019 Schematic description C: \ 2D-CODE \ 90-06 \ 90106617.ptd page 13

Claims (1)

588 pl9— Repair yy. Correction and replacement on the date of 90106617 ... Fan Guiyi 1. A method of wastewater treatment, characterized in that when activated sludge is contacted with sarcosine-based compounds, for activated sludge 01〜5 重量 ％ 的 比 接触。 (Solid conversion), every 1 day with a sarcosine-based compound 0. 01 ~ 5% by weight ratio of contact. \\ A326 \ Total files \ 90 \ 90106617 \ 90106617 (replace) -l.ptc Page 14