What is the best way to dispose of waste slurry water at construction sites?

Bored pile construction mud slurry disposal plan: construction site.

Construction of sedimentation tanks.

First, the sewage is discharged into the sedimentation tank, the suspended solids and oil substances are removed and neutralized, and the discharge standard is detected and discharged into the river. In the process of borehole filling, the screen is used, and the small gravel, sand and other solid particles in the mud are separated, and the mud is discharged to the primary sedimentation tank, the second sedimentation tank to the third sedimentation tank, and fully precipitated. In the process of construction, the excavator is used to clean the primary sedimentation tank, the second sedimentation tank and the third sedimentation tank in time, and the cleaned ballast is transported to the evaporation pond, and then transported to the storage yard or waste slag yard after natural dehydration and solidification.

For the discarded slurry water, add flocculant to the slurry water.

Since slurry water is a suspended liquid containing a certain amount of fine mud particles in water, polymer flocculants are a class of water-soluble polymers.

When it is mixed with mud water, because the flocculant has the functions of bridging, net catching, adsorption and electrical neutralization, it can destroy the stability of the mud water, so that the mud particles can quickly condense and settle from the water, so as to achieve the effect of slurry water separation. Treatment of slurry ballast mixture: The sedimentation ballast cleaned out in the sedimentation tank is transported to the evaporation tank to allow it to be naturally dehydrated and solidified.

The dewatered ballast is either transported to the storage yard or backfilled for the soil pit. The dry mud formed after natural dehydration and solidification is backfilled with the abandoned mud pond on site. The sedimented slurry ballast is transported to the evaporation pond and the clean water is recycled.

The most trouble-free and worry-free way is to find a large suction dredge truck to pull it out, and the natural precipitation can be done.

1. First of all, the grading and precipitation are carried out. The first stage: the slurry water is injected into the sedimentation tank, and the gravity of the mud itself is used to achieve the preliminary separation of the mud and the water; The second stage: the upper wastewater after the initial precipitation is introduced into the second stage sedimentation tank, and alum is added for further precipitation.

2. Step 2: Filtering. The wastewater that has been sedimented twice is filtered through a strainer.

Different specifications of filters can be used to filter sequentially. Initial filtration is carried out through a filter with a slightly larger mesh, and then deep filtration is carried out with a filter with a small mesh. After filtration, the water is basically clear.

3. The third step: physical adsorption, add activated carbon to adsorb odors and microorganisms in the water. The slurry water is treated.

Construction site mud treatment method:

1. Use sealed tankers to be transported to a place permitted by the environmental protection department and abandoned.

2. Through gravity precipitation, physical screening and chemical flocculation and other methods, the sand and water in the slurry are separated, the sand is transported and treated, and the water is discharged to the urban pipe network (but it must meet the discharge standard).

Waste water treatment measures at the construction site:

1. There is a sedimentation tank in each section of the construction site, and after the terrazzo mud is completely settled, the sewage and rainwater will be pumped into the urban sewage system by a sewage pump.

2. Ensure that the rainwater pipe network is used separately from the sewage pipe network, and it is strictly forbidden to discharge other water bodies that are not rainwater into the rainwater pipe network.

3. A sedimentation tank of the washing table is set up at the gate, and the wastewater from the cleaning machinery and transport vehicles is discharged into the sewage pool after precipitation, and shall not flow anywhere.

4. The on-site traffic roads and materials are stacked in a unified planning drainage ditch to keep the drainage system in good condition, control the flow of sewage, and ensure that there is no stagnant water in the field.

1. Dishwashing fine treatment.

If you want to clean the grout, you can use a detergent. Apply the detergent directly to the clothing or items with the grout and continue wiping, the grout will break down, and finally rinse the items under the tap and then wash them off.

2. Hot towel compress.

If you want to clean the grout, you can use a hot towel. First prepare a basin of hot water, put the towel in it, wait for the towel to soak completely, then remove it, wring out the water, and cover the parts with cement slurry. After waiting for ten minutes, the grout will become brittle and fall off.

3. Toothpaste. Soak the garment in clean water and wait for the garment to soak, then apply toothpaste to the surface of the grout and scrub the grout with a discarded toothbrush.

For the method of construction mud treatment, the process is the first in Guangdong. The following operations are carried out by the letter of environmental protection:

1. Pretreatment: use gravity sedimentation to concentrate the original sludge, increase the concentration and reduce the volume. The sludge is mixed with a polymer flocculant, condensed into a flocculent and precipitated into sludge, which prepares the conditions for the next step of dewatering of the filter press.

2. Gravity concentration and dewatering section: the sludge after flocculation pretreatment is sent to the filter belt of the belt filter press, and under the action of gravity, the water outside the floc is filtered out from the filter belt to further reduce the water content of the sludge.

3. Wedge-shaped pre-pressure dewatering section: After gravity dewatering, the sludge has basically lost its fluidity after the pre-pressure dewatering of the wedge-shaped section, which ensures the dewatering of the sludge in the pressing and dewatering section.

4. High-pressure dewatering section of the extrusion roller: the multiple rollers of the belt filter press are reasonably arranged, and the sludge is repeatedly squeezed and sheared to gradually reduce the sludge moisture, and then through the extrusion of the fine pressure roller, a lumpy mud cake with less moisture content is formed, which is automatically discharged at the discharge port.

The construction mud treatment is more common to use Shouxin polyacrylamide flocculant as the slurry water separation agent, the flocculant is a water-soluble polymer, when it is mixed with the mud water, because the flocculant has the functions of bridging, net capture, adsorption and electrical neutralization, etc., it can destroy the stability of the mud water, so that the mud particles can quickly condense and settle from the water, so as to achieve the effect of slurry water separation.